| Scientific Name | English Common Name |
| Aaptos simplex | Sponge |
| Abagrotis alternata | Greater Red Dart |
| Abagrotis brunneipennis | Yankee Dart |
| Abagrotis cupida | Brown Climbing Cutworm |
| Abagrotis dickeli | Moth |
| Abagrotis discoidalis | Moth |
| Abagrotis dodi | Moth |
| Abagrotis duanca | Moth |
| Abagrotis forbesi | Moth |
| Abagrotis hermina | Moth |
| Abagrotis mirabilis | Moth |
| Abagrotis nanalis | Moth |
| Abagrotis nefascia | Moth |
| Abagrotis reedi | Moth |
| Abagrotis turbulenta | Moth |
| Abagrotis vittifrons | Moth |
| Abdera firma | False Darkling Beetle |
| Aberenicola claparedi oceanica | Rough-Skinned Lugworm |
| Aberenicola claparedi vagabunda | Vagabond Lugworm |
| Abraeus bolteri | Clown Beetle |
| Abraliopsis felis | Squid |
| Abrostola urentis | Spectacled Nettle Moth |
| Abstrusomyzus phloxae | Aphid |
| Acallis gripalis | Moth |
| Acalymma vittatum | Striped Cucumber Beetle |
| Acalypta cooleyi | Lace Bug |
| Acalypta elegans | Lace Bug |
| Acalypta lillianis | True Bug |
| Acalypta parvula | True Bug |
| Acalypta saundersi | True Bug |
| Acalyptus carpini | Minute Seed Weevil |
| Acanthephyra curtirostris | Peaked Shrimp |
| Acanthocinus obliquus | Flat-faced Longhorn |
| Acanthocinus princeps | PonderosPine Bark Borer |
| Acanthocinus pusillus | Flat-faced Longhorn |
| Acanthococcus greeni | True Bug |
| Acanthodoris brunnea | Brown Spiny Doris |
| Acanthodoris lutea | Yellow Dorid |
| Acantholiparis caecus | Fanged Snailfish |
| Acantholiparis opercularis | Spiny Snailfish |
| Acantholomidea porosa | True Bug |
| Acantholycosa solituda | Thinlegged Wolf Spider |
| Acanthonotozoma rusanovae | Amphipod |
| Acanthonus armatus | Bony-eared Assfish |
| Acanthopteroctetes aurulenta | Moth |
| Acanthoscelides aureolus | Large-horned Bruchid |
| Acanthoscelides fraterculus | Large-horned Bruchid |
| Acanthoscelides obtectus | Bean Weevil |
| Acanthoscelides pauperculus | Large-horned Bruchid |
| Acanthoscelides pullus | Bean Weevil |
| Acanthoscelidius acephalus | Minute Seed Weevil |
| Accedomoera melanopthalma | Amphipod |
| Accedomoera vagor | Amphipod |
| Acentrella insignificans | Mayfly |
| Aceroides latipes | Amphipod |
| Achrotile distincta | True Bug |
| Achrotile stylata | True Bug |
| Achrotile subarctica | True Bug |
| Acidostoma hancocki | Amphipod |
| Acidota quadrata | Ocellate Rove Beetle |
| Acinopterus viridis | True Bug |
| Acirsa costulata | Chalky Wentletrap |
| Acleris aenigmana | Moth |
| Acleris arcticana | Moth |
| Acleris bowmanana | Moth |
| Acleris braunana | Moth |
| Acleris britannia | Brittania Moth |
| Acleris caliginosana | Moth |
| Acleris celiana | Moth |
| Acleris cervinana | Moth |
| Acleris comariana | Strawberry Tortrix |
| Acleris cornana | Moth |
| Acleris effractana | Hook-winged Tortrix |
| Acleris foliana | Moth |
| Acleris forbesana | Forbes' Acleris |
| Acleris forsskaleana | Maple Leaftier |
| Acleris fragariana | Moth |
| Acleris fuscana | Moth |
| Acleris hudsoniana | Moth |
| Acleris implexana | Moth |
| Acleris inana | Moth |
| Acleris maccana | Moth |
| Acleris maculidorsana | Stained-back Leafroller |
| Acleris maximana | Moth |
| Acleris minuta | Yellowheaded Fireworm Moth |
| Acleris nigrolinea | Moth |
| Acleris okanagana | Moth |
| Acleris oxycoccana | Moth |
| Acleris paracinderella | Moth |
| Acleris placidana | Black-headed Birch Leaffolder |
| Acleris ptychogrammos | Moth |
| Acleris rhombana | Rhomboid Tortrix |
| Acleris robinsoniana | Robinson's Acleris |
| Acleris scabrana | Gray Rough-wing Moth |
| Acleris schalleriana | Moth |
| Acleris semiannula | Moth |
| Acleris senescens | Moth |
| Acleris subnivana | Moth |
| Acleris variana | Eastern Black-headed Budworm Moth |
| Aclypea bituberosa | Carrion Beetle |
| Acmaeodera idahoensis | Metallic Wood-boring Beetle |
| Acmaeopsoides rufula | Elderberry Longhorn Beetle |
| Acmaeopsoides rufulus | Longhorned Beetle |
| Acolpenteron catostomi | Parasite |
| Acompocoris lepidus | True Bug |
| Acopa perpallida | Moth |
| Acritus nigricornis | Clown Beetle |
| Acrobasis betulella | Birch Tubemaker Moth |
| Acrobasis indigenella | Leaf Crumpler Moth |
| Acrobasis rubrifasciella | Alder Tubemaker Moth |
| Acrobasis suavella | Moth |
| Acrobasis vaccinii | Cranberry Fruitworm Moth |
| Acrocercops astericola | Moth |
| Acrocercops pnosmodiella | Moth |
| Acrocheilus aleutaceus | Chiselmouth |
| Acrocirrus columbianus | Polychaete Worm |
| Acrocirrus occipitalis | Polychaete Worm |
| Acrolocha angustior | Rove Beetle |
| Acrolocha crenulata | Rove Beetle |
| Acrolocha diffusa | Rove Beetle |
| Acrolocha helferi | Rove Beetle |
| Acrolocha leechi | Rove Beetle |
| Acrolocha minuta | Rove Beetle |
| Acromacer bombifrons | Snout and Bark Beetle |
| Acronicta cyanescens | Blue-gray Dagger |
| Acronicta hasta | Speared Dagger Moth |
| Acronicta impressa | Willow Dagger Moth |
| Acronicta insularis | Marsh Dagger |
| Acronicta lanceolaria | Lanceolatre Dagger Moth |
| Acronicta lupini | The Little Bear |
| Acronicta mansueta | Gentle Dagger Moth |
| Acronicta marmorata | Marble Dagger Moth |
| Acronicta quadrata | Quadrate Dagger Moth |
| Acronicta strigulata | Dagger Moth |
| Acronicta superans | Splendid Dagger |
| Acrotrichis aspera | Beetle |
| Acrotrichis castanea | Feather-Winged Beetle |
| Acrotrichis cognata | Feather-Winged Beetle |
| Acrotrichis diffinis | Feather-Winged Beetle |
| Acrotrichis grandicollis | Water-penny Beetle |
| Acrotrichis henrici | Feather-Winged Beetle |
| Acrotrichis insularis | Feather-Winged Beetle |
| Acrotrichis intermedia | Water-penny Beetle |
| Acrotrichis josephi | Feather-Winged Beetle |
| Acrotrichis parallelopipeda | Feather-Winged Beetle |
| Acrotrichis parva | Water-penny Beetle |
| Acrotrichis silvatica | Water-penny Beetle |
| Acrotrichis vicina | Feather-Winged Beetle |
| Acrotrichis volans | Water-penny Beetle |
| Acrotrichis xanthocera | Featherwing[ed] Beetle |
| Acrulia crenulata | Rove Beetle |
| Acrulia tumidula | Rove Beetle |
| Actebia balanitis | Moth |
| Acteocina culcitella | Pillow Barrel-Bubble |
| Acteocina eximia | Intermediate Barrel-Bubble |
| Acteocina inculta | Rude Barrel-Bubble |
| Actidium crotchianum | Feather-Winged Beetle |
| Actinobdella triannulata | Freshwater Leech |
| Actium fastosum | Rove Beetle |
| Actizona trifoveata | Rove Beetle |
| Aculepeira packardi | Orbweaver |
| Acupalpus carus | False Bombardier Beetle |
| Acupalpus meridianus | False Bombardier Beetle |
| Acylophorus pronus | Large Rove Beetle |
| Acyrthosiphon caraganae | Caragana Aphid |
| Acyrthosiphon malvae malvae | Aphid |
| Acyrthosiphon malvae rogersi | Aphid |
| Acyrthosiphon pisum | Aphid |
| Acyrthosiphon pseudodirhodus | Aphid |
| Acyrthosiphon purshiae | Aphid |
| Adaina cinerascens | Ashy Plume Moth |
| Adaina montanus | Mountain Plume Moth |
| Adalaria evincta | Crowned Dorid |
| Adalaria jannae | Nudibranch |
| Adalaria proxima | Yellow False Doris |
| Adela purpurea | Moth |
| Adelges abietis | True Bug |
| Adelges lariciatus | True Bug |
| Adelges nordmannianae | True Bug |
| Adelges oregonensis | True Bug |
| Adelges piceae | True Bug |
| Adelges tsugae | True Bug |
| Adelphocoris rapidus | True Bug |
| Adelphocoris superbus | True Bug |
| Admete couthouyi | Northern Admete |
| Admetovis oxymorus | Moth |
| Admetovis similaris | Moth |
| Adocia dubia | Sponge |
| Adocia gellindra | Sponge |
| Adontorhina cyclia | Circle Axinopsid |
| Adontorhina sphaericosa | Inflated Axinopsid |
| Adota maritima | Rove Beetle |
| Adula californiensis | California Datemussel |
| Aedes aboriginis nipponii | Mosquito |
| Aedes aloponotum | Mosquito |
| Aedes campestris | Mosquito |
| Aedes canadensis | Mosquito |
| Aedes cataphylla | Mosquito |
| Aedes communis | Mosquito |
| Aedes diantaeus | Mosquito |
| Aedes euedes | Mosquito |
| Aedes excrucians | Mosquito |
| Aedes fitchii | Mosquito |
| Aedes flavescens | Mosquito |
| Aedes hendersoni | Mosquito |
| Aedes hexodontus | Mosquito |
| Aedes impiger | Mosquito |
| Aedes implicatus | Mosquito |
| Aedes increpitus | Mosquito |
| Aedes intrudens | Mosquito |
| Aedes japonicus | Asian Bush Mosquito |
| Aedes melanimon | Mosquito |
| Aedes mercurator | Mosquito |
| Aedes nevadensis | Mosquito |
| Aedes nigripes | Mosquito |
| Aedes pionips | Mosquito |
| Aedes provocans | Mosquito |
| Aedes pullatus | Mosquito |
| Aedes riparius | Mosquito |
| Aedes spencerii | Mosquito |
| Aedes sticticus | Mosquito |
| Aedes vexans | Mosquito |
| Aega plebia | Isopod |
| Aega symmetrica | Isopod |
| Aegialia blanchardi | Hide Beetle |
| Aegialia conferta | Hide Beetle |
| Aegialia crassa | Hide Beetle |
| Aegialia criddlei | Scarab Beetle |
| Aegialia cylindrica | Scarab Beetle |
| Aegialia lacustris | Hide Beetle |
| Aegialia montana | Scarab Beetle |
| Aegialia opaca | Scarab Beetle |
| Aegialia rufescens | Scarab Beetle |
| Aegialia terminalis | Scarab Beetle |
| Aegialites californicus | Narrow-waisted Bark Beetle |
| Aegialites canadensis | Narrow-waisted Bark Beetle |
| Aegialites charlottae | Narrow-waisted Bark Beetle |
| Aegialites latus | Narrow-waisted Bark Beetle |
| Aelia americana | True Bug |
| Aeolothrips fasciatus | Thrip |
| Aeolus mellillus comis | Click Beetle |
| Aeropedellus clavatus | Club-horned Grasshopper |
| Aeropsis fulva | Oblong Sea Urchin |
| Aetea anguina | Bryozoa |
| Aetea ligulata | Bryozoa |
| Aetea truncata | Bryozoa |
| Aethes biscana | Moth |
| Aethes deutschiana | Moth |
| Aethes monera | Moth |
| Aethes promptana | Moth |
| Aethes razowskii | Razowski's Aethes |
| Aethes rutilana | Moth |
| Aethes smeathmanniana | Smeathmann's Aethes |
| Aetole extraneella | Moth |
| Afrogethes canadensis | Pollen Beetle |
| Agabinus glabrellus | Predaceous Diving Beetle |
| Agabus adpressus | Predacious Diving Beetle |
| Agabus ajax | Predaceous Diving Beetle |
| Agabus ambiguus | Predaceous Diving Beetle |
| Agabus ancillus | Predaceous Diving Beetle |
| Agabus approximatus | Predaceous Diving Beetle |
| Agabus arcticus | Predaceous Diving Beetle |
| Agabus audeni | Predaceous Diving Beetle |
| Agabus bicolor | Predaceous Diving Beetle |
| Agabus bifarius | Predaceous Diving Beetle |
| Agabus bjorkmanae | Predaceous Diving Beetle |
| Agabus clavicornis | Predaceous Diving Beetle |
| Agabus confertus | Predacious Diving Beetle |
| Agabus confinis | Predaceous Diving Beetle |
| Agabus coxalis | Predacious Diving Beetle |
| Agabus crassipes | Beetle |
| Agabus discolor | Predaceous Diving Beetle |
| Agabus discors | Predacious Diving Beetle |
| Agabus elongatus | Predaceous Diving Beetle |
| Agabus erichsoni | Predacious Diving Beetle |
| Agabus fuscipennis | Predaceous Diving Beetle |
| Agabus griseipennis | Predaceous Diving Beetle |
| Agabus infuscatus | Predaceous Diving Beetle |
| Agabus inscriptus | Predaceous Diving Beetle |
| Agabus leptapsis | Predaceous Diving Beetle |
| Agabus lugens | Predacious Diving Beetle |
| Agabus nectris | Predacious Diving Beetle |
| Agabus obliteratus nectris | Predaceous Diving Beetle |
| Agabus oblongulus | Predacious Diving Beetle |
| Agabus opacus | Predacious Diving Beetle |
| Agabus phaeopterus | Predaceous Diving Beetle |
| Agabus pisobius | Predaceous Diving Beetle |
| Agabus punctulatus | Predaceous Diving Beetle |
| Agabus semipunctatus | Predaceous Diving Beetle |
| Agabus smithi | Predaceous Diving Beetle |
| Agabus thomsoni | Predacious Diving Beetle |
| Agabus verisimilis | Predaceous Diving Beetle |
| Agabus wasastjernae | Predacious Diving Beetle |
| Agallia quadripunctata | True Bug |
| Agalliopsis abietaria | True Bug |
| Agalliopsis ancistra | True Bug |
| Agalma elegans | Jellyfish |
| Agapetus taho | Caddisfly |
| Agasphaerops niger | Snout Beetle |
| Agathidium angulare | Round Fungus Beetle |
| Agathidium angustoperculum | Round Fungus Beetle |
| Agathidium athabascanum | Round Fungus Beetle |
| Agathidium californicum | Round Fungus Beetle |
| Agathidium cavisternum | Round Fungus Beetle |
| Agathidium columbianum | Round Fungus Beetle |
| Agathidium concinnum | Round Fungus Beetle |
| Agathidium conjunctum | Round Fungus Beetle |
| Agathidium contiguum | Round Fungus Beetle |
| Agathidium depressum | Small Carrion Beetle |
| Agathidium difforme | Small Carrion Beetle |
| Agathidium estriatum | Round Fungus Beetle |
| Agathidium exiguum | Round Fungus Beetle |
| Agathidium maculosum | Small Carrion Beetle |
| Agathidium marae | Round Fungus Beetle |
| Agathidium obtusum | Round Fungus Beetle |
| Agathidium omissum | Round Fungus Beetle |
| Agathidium picipes | Round Fungus Beetle |
| Agathidium pulchrum | Small Carrion Beetle |
| Agathidium rotundulum | Round Fungus Beetle |
| Agathidium sexstriatum | Round Fungus Beetle |
| Agelenopsis actuosa | Grass Spider |
| Agelenopsis oklahoma | Grass Spider |
| Agelenopsis oregonensis | Grass Spider |
| Agelenopsis utahana | Grass Spider |
| Agenotettix deorum | White-whiskered Grasshopper |
| Aglaja ocelligera | Spotted Aglajid |
| Aglaophamus rubella anops | Polychaete Worm |
| Aglossa cacamica | Moth |
| Aglossa caprealis | Stored Grain Moth |
| Aglossa electalis | Moth |
| Agnippe prunifoliella | Moth |
| Agnocoris rubicundus | True Bug |
| Agnocoris utahensis | True Bug |
| Agnorisma bugrai | Collared Dart |
| Agnyphantes arboreus | Spider |
| Agoliinus albertanus | Scarab Beetle |
| Agoliinus aleutus | Scarab Beetle |
| Agoliinus aquilonarius | Scarab Beetle |
| Agoliinus bidentatus | Scarab Beetle |
| Agoliinus canadensis | Hide Beetle |
| Agoliinus congregatus | Hide Beetle |
| Agoliinus corruptor | Hide Beetle |
| Agoliinus guttatus | Scarab Beetle |
| Agoliinus hatchi | Scarab Beetle |
| Agoliinus incommunis | Scarab Beetle |
| Agoliinus leopardus | Hide Beetle |
| Agoliinus piceatus | Scarab Beetle |
| Agoliinus sigmoideus | Hide Beetle |
| Agonoleptus conjunctus | False Bombardier Beetle |
| Agonopterix antennariella | Moth |
| Agonopterix arenella | Moth |
| Agonopterix arnicella | Moth |
| Agonopterix canadensis | Canadian Agonopterix |
| Agonopterix clarkei | Moth |
| Agonopterix conterminella | Moth |
| Agonopterix flavicomella | Moth |
| Agonopterix gelidella | Moth |
| Agonopterix nubiferella | Moth |
| Agonopterix oregonensis | Moth |
| Agonopterix posticella | Moth |
| Agonopterix rosaciliella | Moth |
| Agonopterix sabulella | Moth |
| Agonopterix thelmae | Thelma's Agonopterix |
| Agonum affine | Long-necked Ground Beetle |
| Agonum belleri | Ground Beetle |
| Agonum bicolor | Ground Beetle |
| Agonum consimile | Long-necked Ground Beetle |
| Agonum decorum | Long-necked Ground Beetle |
| Agonum exaratum | Ground Beetle |
| Agonum harrisii | Long-necked Ground Beetle |
| Agonum limbatum | Long-necked Ground Beetle |
| Agonum melanarium | Long-necked Ground Beetle |
| Agonum metallescens | Ground Beetle |
| Agonum mutatum | Long-necked Ground Beetle |
| Agonum picicornoides | Ground Beetle |
| Agonum quinquepunctatum | Ground Beetle |
| Agonum retractum | Long-necked Ground Beetle |
| Agonum simile | Ground Beetle |
| Agonum subsericeum | Ground Beetle |
| Agonum suturale | Long-necked Ground Beetle |
| Agonum variolatum | Ground Beetle |
| Agraylea multipunctata | Caddisfly |
| Agraylea saltesea | Caddisfly |
| Agrilus anxius | Bronze Birch Borer |
| Agrilus crataegi | Metallic Wood-boring Beetle |
| Agrilus granulatus liragus | Beetle |
| Agrilus granulatus populi | Metallic Wood-boring Beetle |
| Agriotella columbiana | Click Beetle |
| Agriotella occidentalis | Click Beetle |
| Agriotes apicalis | Brown Wireworm |
| Agriotes criddlei | Click Beetle |
| Agriotes ferrugineipennis | Brown Wireworm |
| Agriotes hoodi | Click Beetle |
| Agriotes limosus | Brown Wireworm |
| Agriotes lineatus | Lined Click Beetle |
| Agriotes obscurus | Click Beetle |
| Agriotes opaculus | Brown Wireworm |
| Agriotes sparsus | Brown Wireworm |
| Agriotes stabilis | Brown Wireworm |
| Agriotes thevenetii | Brown Wireworm |
| Agriotes thevenetti | Click Beetle |
| Agriphila attenuatus | Moth |
| Agriphila plumbifimbriellus | Moth |
| Agriphila straminella | Moth |
| Agriphila vulgivagellus | Vagabond Crambus Moth |
| Agrius cingulata | Pink-spotted Hawk Moth |
| Agroeca pratensis | Liocranid Sac Spider |
| Agronus carri | White-fringed Weevil |
| Agrotis antica | Moth |
| Agrotis buchholzi | Moth |
| Agrotis gravis | Moth |
| Agrotis ruta | Moth |
| Agrotis venerabilis | Venerable Dart |
| Agrotis volubilis | Voluble Dart |
| Agrypnia deflata | Caddisfly |
| Agrypnia sahlbergi | Caddisfly |
| Agrypnia vestita | Large Caddisfly |
| Agulla arizonica | Snakefly |
| Agyneta allosubtilis | Sheetweb Spider |
| Agyneta aquila | Sheetweb Spider |
| Agyneta bucklei | Sheetweb Spider |
| Agyneta danielbelangeri | Sheetweb Spider |
| Agyneta darrelli | Sheetweb Spider |
| Agyneta emertoni | Dwarf Spider |
| Agyneta fabra | Dwarf Spider |
| Agyneta fillmorana | Dwarf Spider |
| Agyneta flibuscrocus | Sheetweb Spider |
| Agyneta fratrella | Sheetweb Spider |
| Agyneta lophophor | Sheetweb Spider |
| Agyneta manni | Sheetweb Spider |
| Agyneta maritima | Sheetweb Spider |
| Agyneta nigripes | Sheetweb Spider |
| Agyneta olivacea | Sheetweb Spider |
| Agyneta ordinaria | Dwarf Spider |
| Agyneta perspicua | Sheetweb Spider |
| Agyneta protrudens | Dwarf Spider |
| Agyneta simplex | Dwarf Spider |
| Agyneta uta | Sheetweb Spider |
| Agyneta watertoni | Sheetweb Spider |
| Agyrtes longulus | Primitive Carrion Beetle |
| Ahasverus advena | Foreign Grain Beetle |
| Airora aequalis | Bark-gnawing Beetle |
| Akanthophoreus longiremis | Isopod |
| Akephorus obesus | Round Sand Beetle |
| Akiodoris salacia | Sea Goddess Dorid |
| Alaus melanops | Click Beetle |
| Alcyonidium gelatinosum | Gelatinous Leather Bryozoan |
| Alcyonidium mammillatum | Bryozoa |
| Alderina brevispina | Bryozoa |
| Aldisa albomarginata | White-lined Aldisa |
| Aldisa cooperi | Cooper's Aldisa |
| Aldisa tara | Tara's Aldisa |
| Aldrovandia oleosa | Halosaur |
| Aleochara assiniboin | Rove Beetle |
| Aleochara bilineata | Rove Beetle |
| Aleochara bimaculata | Rove Beetle |
| Aleochara carmanah | Rove Beetle |
| Aleochara castaneipennis | Rove Beetle |
| Aleochara curtidens | Rove Beetle |
| Aleochara curtula | Rove Beetle |
| Aleochara fumata | Rove Beetle |
| Aleochara gracilicornis | Rove Beetle |
| Aleochara lacertina | Rove Beetle |
| Aleochara lanuginosa | Rove Beetle |
| Aleochara laramiensis | Rove Beetle |
| Aleochara lata | Rove Beetle |
| Aleochara litoralis | Staphylinid Beetle |
| Aleochara littoralis | Rove Beetle |
| Aleochara pacifica | Rove Beetle |
| Aleochara quadrata | Rove Beetle |
| Aleochara rubricalis | Rove Beetle |
| Aleochara suffusa | Rove Beetle |
| Aleochara sulcicollis | Rove Beetle |
| Aleochara tahoensis | Rove Beetle |
| Aleochara verna | Rove Beetle |
| Aleochara villosa | Rove Beetle |
| Alepocephalus tenebrosus | Slickhead |
| Aletopauropus lentus | Pauropod |
| Aleuroplatus berbericolus | True Bug |
| Aleyrodes spiraeoides | True Bug |
| Alfocalea montana | Rove Beetle |
| Alia tuberosa | Variegate Dovesnail |
| Aligia californica | True Bug |
| Allandrus populi | Fungus weevil |
| Alle alle | Dovekie |
| Allintoshius nycticeius | Parasite |
| Allocosmoecus partitus | Caddisfly |
| Allocreadium isoporum | Parasite |
| Allocyttus folletti | Oxeye Oreo |
| Allolumpenus hypochromus | Y-Prickleback |
| Allomengea dentisetis | Sheetweb Spider |
| Allomyia bifosa | Caddisfly |
| Allomyia cascadis | Caddisfly |
| Allomyia cidoipes | Caddisfly |
| Allomyia tripunctata | Caddisfly |
| Alloniscus perconvexus | Isopod |
| Allopauropus broelemanni | Pauropod |
| Allopauropus marshalli | Pauropod |
| Alloperla delicata | Stonefly |
| Alloperla fraterna | Stonefly |
| Alloperla medveda | Stonefly |
| Alloperla serrata | Stonefly |
| Alloperla severa | Stonefly |
| Allopoda californica | False Flower Beetle |
| Allorchestes angusta | Amphipod |
| Allorchestes bella bella | Amphipod |
| Allorchestes pacifica | Amphipod |
| Allorchestes parva | Amphipod |
| Allorchestes urocarinata | Amphipod |
| Allosirocallus angulatus | Weevil |
| Allosirocallus disturbatus | Weevil |
| Allosirocalus angulatus | Minute Seed Weevil |
| Allosirocalus disturbatus | Minute Seed Weevil |
| Allosmerus elongatus | Whitebait Smelt |
| Allygus mixtus | True Bug |
| Alniphagus hirsutus | Bark And Ambrosia Beetle |
| Alocentron attenuatum | Pear-shaped Weevil |
| Aloconota cambrica | Rove Beetle |
| Aloconota carmanah | Rove Beetle |
| Alopecosa aculeata | Wolf Spider |
| Alopecosa pictilis | Wolf Spider |
| Alopias vulpinus | Thresher Shark |
| Alosa sapidissima | American Shad |
| Alphitobius diaperinus | Lesser Mealworm |
| Alphitobius laevigatus | Black Fungus Beetle |
| Alsophila pometaria | Fall Cankerworm Moth |
| Altica ambiens | Alder Flea Beetle |
| Altica ambiens ambiens | Beetle |
| Altica bimarginata | Skeletonizing Leaf Beetles and Flea Beetle |
| Altica bimarginata bimarginata | Beetle |
| Altica carduorum | Leaf Beetle |
| Altica caurina | Skeletonizing Leaf Beetles and Flea Beetle |
| Altica corni | Leaf Beetle |
| Altica lazulina | Leaf Beetle |
| Altica prasina | Leaf Beetle |
| Altica prasina prasina | Beetle |
| Altica probata | Leaf Beetle |
| Altica subcostata | Leaf Beetle |
| Altica subplicata | Leaf Beetle |
| Altica tincta | Leaf Beetle |
| Altica tombacina | Leaf Beetle |
| Alydus calcaratus | True Bug |
| Alydus conspersus conspersus | True Bug |
| Alydus conspersus infuscatus | True Bug |
| Alydus eurinus eurinus | True Bug |
| Alydus scutellatus | True Bug |
| Alypia ridingsii | Mountain Forester |
| Amaena occidentalis | Polychaete Worm |
| Amage anops | Polychaete Worm |
| Amalus scortillum | Minute Seed Weevil |
| Amara aenea | Ground Beetle |
| Amara alpina | Seed-Eating Ground Beetle |
| Amara angustata | Seed-Eating Ground Beetle |
| Amara anthobia | Seed-Eating Ground Beetle |
| Amara apricaria | Seed-Eating Ground Beetle |
| Amara aurata | Seed-Eating Ground Beetle |
| Amara avida | Seed-Eating Ground Beetle |
| Amara blanchardi | Seed-Eating Ground Beetle |
| Amara bokori | Ground Beetle |
| Amara californica | Seed-Eating Ground Beetle |
| Amara californica californica | Beetle |
| Amara carinata | Seed-Eating Ground Beetle |
| Amara coelebs | Seed-Eating Ground Beetle |
| Amara conflata | Ground Beetle |
| Amara confusa | Seed-Eating Ground Beetle |
| Amara convexa | Seed-Eating Ground Beetle |
| Amara cupreolata | Seed-Eating Ground Beetle |
| Amara discors | Seed-Eating Ground Beetle |
| Amara ellipsis | Seed-Eating Ground Beetle |
| Amara emancipata | Ground Beetle |
| Amara erratica | Seed-Eating Ground Beetle |
| Amara exlineae | Ground Beetle |
| Amara familiaris | Seed-Eating Ground Beetle |
| Amara farcta | Seed-Eating Ground Beetle |
| Amara gibba | Sun Beetle |
| Amara glacialis | Seed-Eating Ground Beetle |
| Amara hyperborea | Seed-Eating Ground Beetle |
| Amara lacustris | Seed-Eating Ground Beetle |
| Amara laevipennis | Seed-Eating Ground Beetle |
| Amara latior | Seed-Eating Ground Beetle |
| Amara littoralis | Seed-Eating Ground Beetle |
| Amara longula | Ground Beetle |
| Amara lunicollis | Seed-Eating Ground Beetle |
| Amara merula | Ground Beetle |
| Amara musculis | Seed-Eating Ground Beetle |
| Amara obesa | Seed-Eating Ground Beetle |
| Amara ovata | Seed-Eating Ground Beetle |
| Amara pallipes | Seed-Eating Ground Beetle |
| Amara patruelis | Seed-Eating Ground Beetle |
| Amara pseudobrunnea | Seed-Eating Ground Beetle |
| Amara quenseli | Seed-Eating Ground Beetle |
| Amara quenseli quenseli | Beetle |
| Amara rugulifera | Ground Beetle |
| Amara sanjuanensis | Ground Beetle |
| Amara scitula | Seed-Eating Ground Beetle |
| Amara sinuosa | Seed-Eating Ground Beetle |
| Amara spuria | Sun Beetle |
| Amara tenax | Sun Beetle |
| Amara thoracica | Ground Beetle |
| Amara torrida | Seed-Eating Ground Beetle |
| Amara transberingiensis | Sun Beetle |
| Amaurobius borealis | Hackledmesh Weaver |
| Ambesa laetella | Moth |
| Ambesa walsinghami | Moth |
| Amblopusa borealis | Rove Beetle |
| Amblopusa brevipes | Rove Beetle |
| Amblyderus obesus | Antlike Flower Beetle |
| Amblyderus owyhee | An Antlike Flower Beetle |
| Amblyderus pallens | pseudo |
| Amblyopone oregonense | Dracula Ant |
| Amblyraja badia | Broad Skate |
| Amblysellus grex | True Bug |
| Amblysellus punctatus | True Bug |
| Amblysellus wyomus | True Bug |
| Amblytylus nasutus | True Bug |
| Ameiurus natalis | Yellow Bullhead |
| Ameletus celer | Mayfly |
| Ameletus cooki | Mayfly |
| Ameletus oregonensis | Mayfly |
| Ameletus pritchardi | Mayfly |
| Ameletus shepherdi | Mayfly |
| Ameletus similior | Mayfly |
| Ameletus sparsatus | Mayfly |
| Ameletus subnotatus | Mayfly |
| Ameletus suffusus | Mayfly |
| Ameletus validus | Mayfly |
| Ameletus vancouverensis | Mayfly |
| Ameletus velox | Mayfly |
| Ameletus vernalis | Mayfly |
| Americhelidium pectinatum | Amphipod |
| Americhelidium rectipalmum | Amphipod |
| Americhelidium setosum | Amphipod |
| Americhelidium shoemakeri | Amphipod |
| Americhelidium variabilum | Amphipod |
| Amerizus oblonguloides | Ground Beetle |
| Amerizus oblongulus | Ground Beetle |
| Amerizus spectabilis | Round Sand Beetle |
| Amerocerus confusus | Soft-Winged Flower Beetle |
| Amerocerus glabratus | Soft-Winged Flower Beetle |
| Amerocerus olympianus | Soft-Winged Flower Beetle |
| Amerocerus plenus | Soft-Winged Flower Beetle |
| Amerocerus provincialis | Soft-Winged Flower Beetle |
| Amerocerus quadricollis | Soft-Winged Flower Beetle |
| Amerocerus robustus | Soft-Winged Flower Beetle |
| Ametor latus | Giant Water Scavenger Beetle |
| Amiantis callosa | White Venus |
| Amidostomum acutum | Parasite |
| Amidostomum anseris | Parasite |
| Amidostomum cygni | Parasite |
| Amidostomum fulicae | Parasite |
| Amidostomum spatulatum | Parasite |
| Amiocentrus aspilus | Caddisfly |
| Amnestus pallidus | True Bug |
| Amorbia humerosana | White-line Leafroller |
| Amorophaga cryptophori | Moth |
| Ampedus anthracinus | Brown Wireworm |
| Ampedus antracinus | Click Beetle |
| Ampedus apicatus | Brown Wireworm |
| Ampedus atripennis | Brown Wireworm |
| Ampedus deletus | Click Beetle |
| Ampedus dimidiatus | Brown Wireworm |
| Ampedus laurentinus | Click Beetle |
| Ampedus melinus | Brown Wireworm |
| Ampedus nigrinus | Brown Wireworm |
| Ampedus occidentalis | Brown Wireworm |
| Ampedus phelpsi | Click Beetle |
| Ampedus phoenicopterus | Brown Wireworm |
| Ampedus quebecensis | Brown Wireworm |
| Ampedus subtilis | Click Beetle |
| Ampedus varipilis | Brown Wireworm |
| Ampelisca birulai | Amphipod |
| Ampelisca brevisimulata | Amphipod |
| Ampelisca careyi | Amphipod |
| Ampelisca cristata | Amphipod |
| Ampelisca hancocki | Amphipod |
| Ampelisca pugetica | Amphipod |
| Ampelisca unsocolae | Amphipod |
| Ampharete acutifrons | Polychaete Worm |
| Ampharete finmarchica | Polychaete Worm |
| Ampharete goesi | Polychaete Worm |
| Ampharete labrops | Polychaete Worm |
| Amphicercidus pulverulens | True Bug |
| Amphichroum floribundum | Rove Beetle |
| Amphicosmoecus canax | Caddisfly |
| Amphicteis florida | Polychaete Worm |
| Amphicteis mucronata | Polychaete Worm |
| Amphicteis scaphobranchiata | Polychaete Worm |
| Amphictene moorei | Polychaete Worm |
| Amphilectus laxus | Sponge |
| Amphilectus vancouverensis | Sponge |
| Amphilepis patens | Brittle Star |
| Amphilina bipunctata | Parasite |
| Amphimallon majale | Beetle |
| Amphinema platyhedos | Jellyfish |
| Amphinemura linda | Stonefly |
| Amphiodia urtica | Long-Armed Burrowing Brittle Star |
| Amphiophiura bullata pacifica | Scaly Brittle Star |
| Amphiophiura superba | Scaly Brittle Star |
| Amphiopholis pugetana | Long-Armed Burrowing Brittle Star |
| Amphiopholis squamata | Long-Armed Burrowing Brittle Star |
| Amphioplus euryaspis | Long-Armed Burrowing Brittle Star |
| Amphioplus macraspis | Long-Armed Burrowing Brittle Star |
| Amphioplus strongyloplax | Long-Armed Burrowing Brittle Star |
| Amphipoea americana | American Ear Moth |
| Amphipoea interoceanica | Interoceanic Ear Moth |
| Amphiporus cruenatus | Ribbon Worm |
| Amphiporus gelatinosus | Ribbon Worm |
| Amphiporus imparispinosus | Ribbon Worm |
| Amphiporus tigrinus | Ribbon Worm |
| Amphipyra glabella | Smooth Amphipyra |
| Amphisamytha bioculata | Polychaete Worm |
| Amphissa reticulata | Reticulate Amphissa |
| Amphissa versicolor | Variegate Amphissa |
| Amphistichus rhodoterus | Redtail Surfperch |
| Amphitrite cirrata | Polychaete Worm |
| Amphiura arcystata | Long-Armed Burrowing Brittle Star |
| Amphiura carchara | Long-Armed Burrowing Brittle Star |
| Amphiura diomedeae | Long-Armed Burrowing Brittle Star |
| Amphivectura monticola | Soft-Winged Flower Beetle |
| Amphizoa lecontei | Trout-Stream Beetle |
| Amphorophora agathonica | True Bug |
| Amphorophora forbesi | True Bug |
| Amphorophora geranii | True Bug |
| Amphorophora parviflori | True Bug |
| Amphorophora rossi | True Bug |
| Amphorophora rubitoxica | True Bug |
| Amphorophora stachyophila | True Bug |
| Amphorophora tigwatensa | True Bug |
| Amphorophora urtica | True Bug |
| Ampithoe dalli | Amphipod |
| Ampithoe kussakini | Amphipod |
| Ampithoe lacerota | Amphipod |
| Ampithoe plumulosa | Amphipod |
| Ampithoe sectimanus | Amphipod |
| Ampithoe simulans | Amphipod |
| Ampithoe valida | Amphipod |
| Amplicephalus inimicus | True Bug |
| Amplicephalus montanus | True Bug |
| Amplicephalus nebulosus | True Bug |
| Amydria curvistrigella | Moth |
| Amydria effrentella | Moth |
| Anaata brepha | Sponge |
| Anaata spongigartina    | Sponge |
| Anacaena limbata | Minute Mud-loving Beetle |
| Anacaena lutescens | Minute Mud-loving Beetle |
| Anacampsis conclusella | Moth |
| Anacampsis fragariella | Moth |
| Anacampsis innocuella | Dark-headed Aspen Leafroller |
| Anacampsis niveopulvella | Pale-headed Aspen Leafroller |
| Anagapetus bernea | Caddisfly |
| Anagapetus debilis | Caddisfly |
| Anagapetus hoodi | Caddisfly |
| Anagrapha falcifera | Celery Looper Moth |
| Anaitides citrina | Polychaete Worm |
| Anaitides groenlandica | Polychaete Worm |
| Anaitides maculata | Polychaete Worm |
| Anaitides madeirensis | Polychaete Worm |
| Anaitides mucosa | Polychaete Worm |
| Anametis granulata | Pine Needle Weevil |
| Anaptus major | True Bug |
| Anarsia lineatella | Peach Twig Borer |
| Anarta alta | Moth |
| Anarta columbica | Moth |
| Anarta crotchii | Moth |
| Anarta decepta | Moth |
| Anarta hamata | Moth |
| Anarta mutata | Mutant Moth |
| Anarta oregonica | Moth |
| Anaspis atrata | False Flower Beetle |
| Anaspis duryi | False Flower Beetle |
| Anaspis flavipennis | False Flower Beetle |
| Anaspis nigrina | False Flower Beetle |
| Anaspis rayi | False Flower Beetle |
| Anaspis rufa | False Flower Beetle |
| Anaspis seposita | False Flower Beetle |
| Anaspis sericea | False Flower Beetle |
| Anathix aggressa | Moth |
| Anathix puta | Puta Sallow Moth |
| Anatis lecontei | Lady Beetle |
| Anatis mali | Lady Beetle |
| Anatis rathvoni | Lady Beetle |
| Anatralata versicolor | Moth |
| Anavitrinella addendaria | Moth |
| Anchastus anthrax | Click Beetle |
| Anchastus cinereipennis | Brown Wireworm |
| Anchomenus aeneolus | Long-necked Ground Beetle |
| Anchomenus quadratus | Long-necked Ground Beetle |
| Ancula gibbosa | Atlantic Ancula |
| Ancylis apicana | Moth |
| Ancylis columbiana | Moth |
| Ancylis comptana | Moth |
| Ancylis diminuatana | Moth |
| Ancylis discigerana | Yellow Birch Leaffolder Moth |
| Ancylis mediofasciana | Moth |
| Ancylis mira | Moth |
| Ancylis nubeculana | Little Cloud Ancylis |
| Ancylis pacificana | Moth |
| Ancylis semiovana | Moth |
| Ancylis simuloides | Moth |
| Ancylis spiraeifoliana complex | Moth |
| Ancylis subaequana | Moth |
| Ancylis tenebrica | Moth |
| Ancylis tineana | Moth |
| Ancylis unguicella | Moth |
| Ancylosis albipenella | Moth |
| Ancylosis undulatella | Sugarbeet Crown Borer |
| Ancyracanthopsis bendelli | Parasite |
| Ancyracanthopsis coronata | Parasite |
| Andrenosoma fulvicaudum | Robber Fly |
| Andropolia diversilineata | Cutworm Moth |
| Anelastes drurii | False Click Beetle |
| Anelastes druryi | False Click Beetle |
| Anelpistus canadensis | False Longhorn Beetle |
| Anepsiota quadricollis | Rove Beetle |
| Anepsiota terminalis | Rove Beetle |
| Aneurus borealis | True Bug |
| Aneurus inconstans | True Bug |
| Aneurus simplex | True Bug |
| Angulosaccus tenuis | Deep-Sea Hermit Parasitic Barnacle |
| Anhimella contrahens | Cutworm Moth |
| Anhimella pacifica | Cutworm Moth |
| Anhimella perbrunnea | Cutworm Moth |
| Anicla exuberans | Moth |
| Anicla tepperi | Moth |
| Anidolyta spongotheras | Limpet-Like Yellow-Green Seaslug |
| Anisakis simplex | Parasite |
| Anisandrus dispar | Bark Beetle |
| Anisococcus oregonensis | True Bug |
| Anisococcus quercus | True Bug |
| Anisodactylus alternans | False Bombardier Beetle |
| Anisodactylus amaroides | Ground Beetle |
| Anisodactylus californicus | False Bombardier Beetle |
| Anisodactylus harrisii | False Bombardier Beetle |
| Anisodactylus kirbyi | False Bombardier Beetle |
| Anisodactylus nigrita | False Bombardier Beetle |
| Anisodactylus nivalis | Ground Beetle |
| Anisodactylus rudis | Ground Beetle |
| Anisodactylus similis | False Bombardier Beetle |
| Anisogammarus epistomus | Amphipod |
| Anisogammarus pugettensis | Amphipod |
| Anisogammarus slatteryi | Amphipod |
| Anisorchis opisthorchis | Parasite |
| Anisostena californica | Tortoise Beetles and the Hispine |
| Anisostena nigrita | Tortoise Beetles and the Hispine |
| Anisotoma amica | Small Carrion Beetle |
| Anisotoma confusa | Round Fungus Beetle |
| Anisotoma discolor | Small Carrion Beetle |
| Anisotoma errans | Small Carrion Beetle |
| Anisotoma globososa | Small Carrion Beetle |
| Anisotoma humeralis | Small Carrion Beetle |
| Anisotoma nevadensis | Round Fungus Beetle |
| Annaphila arvalis | Moth |
| Annaphila danistica | Cutworm Moth |
| Annettenia eremonoma | Moth |
| Anobium punctatum | Furniture Beetle |
| Anobothrus gracilis | Polychaete Worm |
| Anogdus fusciclavus | Round Fungus Beetle |
| Anogdus insolitus | Round Fungus Beetle |
| Anogdus mirabilis | Round Fungus Beetle |
| Anogdus potens | Round Fungus Beetle |
| Anonchohaptor anomulum | Parasite |
| Anonyx lilljeborgi | Amphipod |
| Anonyx nugax | Amphipod |
| Anopheles freeborni | Mosquito |
| Anopheles punctipennis | Mosquito |
| Anopina arizonana | Moth |
| Anopina ednana | Moth |
| Anoplagonus inermis | Smooth Alligatorfish |
| Anoplogaster cornuta | Fangtooth |
| Anoplonyx luteipes | Threelined Larch Sawfly |
| Anoscopus albifrons | True Bug |
| Anoscopus albiger | True Bug |
| Anoscopus serratulae | True Bug |
| Anostirus bipunctatus | Glowing Click Beetle |
| Anotopterus nikparini | North Pacific Daggertooth |
| Anotylus niger | Rove Beetle |
| Anotylus nitidulus | Rove Beetle |
| Anotylus rugosus | Spiny-legged Rove Beetle |
| Anotylus sobrinus | Rove Beetle |
| Anotylus tetracarinatus | Rove Beetle |
| Anstenoptilia marmarodactyla | Sage Plume Moth |
| Antaeotricha manzanitae | Moth |
| Antarctophthirius microchir | Louse |
| Antepirrhoe atrifasciata | Moth |
| Antepirrhoe fasciata | Moth |
| Anthaxia caseyi pseudotsugae | Metallic Wood-boring Beetle |
| Anthaxia retifer | Metallic Wood-boring Beetle |
| Antherophagus ochraceus | Silken Fungus Beetle |
| Antherophagus pallidivestis | Silken Fungus Beetle |
| Antherophagus suturalis | Silken Fungus Beetle |
| Anthicus bellulus | pseudo |
| Anthicus biguttulus | pseudo |
| Anthicus cervinus | pseudo |
| Anthicus coracinus | Antlike Flower Beetle |
| Anthicus cribratus | Antlike Flower Beetle |
| Anthicus ephippium | pseudo |
| Anthicus flavicans | pseudo |
| Anthicus hastatus | pseudo |
| Anthicus lecontei | pseudo |
| Anthicus lutulentus | pseudo |
| Anthicus nanus | pseudo |
| Anthicus praeceps | pseudo |
| Anthicus punctulatus | pseudo |
| Antho illgi | Sponge |
| Antho karykina | Sponge |
| Antho lambei | Sponge |
| Anthoarcuata graceae  | Sponge |
| Anthobium clarkae | Rove Beetle |
| Anthobium clarki | Rove Beetle |
| Anthobium fimetarium | Rove Beetle |
| Anthobium occiduum | Rove Beetle |
| Anthobium reflexicolle | Rove Beetle |
| Anthobium sinuosum | Rove Beetle |
| Anthocoris confusus | True Bug |
| Anthocoris musculus | True Bug |
| Anthocoris nemoralis | True Bug |
| Anthocoris tomentosus | True Bug |
| Anthocoris whitei | True Bug |
| Anthocotyle merluccii | Parasite |
| Anthomastus glandiflora | Coral |
| Anthonomus albus | Weevil |
| Anthonomus confusus | Snout Beetle |
| Anthonomus consors | Snout Beetle |
| Anthonomus corvulus | Minute Seed Weevil |
| Anthonomus deceptus | Snout Beetle |
| Anthonomus extensus | Minute Seed Weevil |
| Anthonomus haematopus | Minute Seed Weevil |
| Anthonomus hirtus | Snout Beetle |
| Anthonomus lecontei | Minute Seed Weevil |
| Anthonomus melancholicus | Snout Beetle |
| Anthonomus molochinus | Snout Beetle |
| Anthonomus nebulosus | Minute Seed Weevil |
| Anthonomus ochreopilosus | Minute Seed Weevil |
| Anthonomus quadrigibbus | Apple Curculio |
| Anthonomus quesnelensis | Snout Beetle |
| Anthonomus rubidus | Minute Seed Weevil |
| Anthonomus rubricus | Snout Beetle |
| Anthonomus signatus | Strawberry Bud Weevil |
| Anthonomus squamosus | Minute Seed Weevil |
| Anthonomus suturalis | Minute Seed Weevil |
| Anthophila alpinella | Moth |
| Anthoptilum grandiflorum | Pennatulacean |
| Anthoptilum murrayi | Pennatulacean |
| Anthrenus blanci | Carpet Beetle |
| Anthrenus lepidus | Carpet Beetle |
| Anthrenus pimpinellae | Carpet Beetle |
| Anthrenus scrophulariae scrophulariae | Beetle |
| Anthrenus verbasci | Varied Carpet Beetle |
| Anthropoides virgo | Demoiselle Crane |
| Anthus cervinus | Red-Throated Pipit |
| Antimora microlepis | Pacific Flatnose |
| Antiplanes catalinae | Sea Snail |
| Antiplanes voyi | Perverse Turret |
| Antispila freemani | Moth |
| Antistea brunnea | Hahniid Spider |
| Antrechinus drygalskii perfidus | Sea Urchin |
| Antrodiaetus cerberus | Spider |
| Antrodiaetus pugnax | Foldingdoor Spider |
| Antrostomus vociferus | Eastern Whip-poor-will |
| Anuropus bathypelagicus | Isopod |
| Anyphaena aperta | Ghost Spider |
| Anyphaena pacifica | Ghost Spider |
| Aoplonema princeps | True Bug |
| Aoplonema uhleri | True Bug |
| Aoroides columbiae | Amphipod |
| Aoroides exilis | Amphipod |
| Aoroides inermis | Amphipod |
| Aoroides intermedius | Amphipod |
| Aoroides spinosus | Amphipod |
| Apamea acera | Cutworm Moth |
| Apamea atriclava | Cutworm Moth |
| Apamea centralis | Cutworm Moth |
| Apamea cinefacta | Cutworm Moth |
| Apamea commoda | Cutworm Moth |
| Apamea contradicta | Cutworm Moth |
| Apamea genialis | Moth |
| Apamea inordinata | Cutworm Moth |
| Apamea lignicolora | Cutworm Moth |
| Apamea longula | Cutworm Moth |
| Apamea lutosa | Cutworm Moth |
| Apamea occidens | Western Apamea |
| Apamea plutonia | Cutworm Moth |
| Apamea sora | Cutworm Moth |
| Apamea spaldingi | Cutworm Moth |
| Apamea zeta | Cutworm Moth |
| Apantesis complicata | Moth |
| Apantesis doris | Doris Tiger Moth |
| Apantesis margo | Moth |
| Apantesis obliterata | Moth |
| Apantesis quenseli | Moth |
| Apantesis speciosa | Moth |
| Apantesis virgo | Virgin Tiger Moth |
| Apantesis virguncula | Little Virgin Tiger Moth |
| Apatania alberta | Caddisfly |
| Apatania shoshone | Caddisfly |
| Apatania sorex | Caddisfly |
| Apatania zonella | Caddisfly |
| Apateticus bracteatus | True Bug |
| Apatolestes comastes | Horse Fly |
| Aphaenogaster occidentalis | Ant |
| Aphalara persicariae | True Bug |
| Aphalara rumicis | True Bug |
| Aphanopus carbo | Black Scabbardfish |
| Aphelia alleniana | Allen's Tortrix |
| Aphelia koebelei | Moth |
| Aphelochaeta multifilis | Polychaete Worm |
| Aphelochaeta parvus | Polychaete Worm |
| Aphelochaeta secundus | Polychaete Worm |
| Aphelochaeta serratisetis | Polychaete Worm |
| Aphenolia monogama | Sap-Feeding Beetle |
| Aphileta microtarsa | Spider |
| Aphileta misera | Sheetweb Spider |
| Aphis asclepiadis | True Bug |
| Aphis callunae | True Bug |
| Aphis canae | True Bug |
| Aphis ceanothi | True Bug |
| Aphis chani | True Bug |
| Aphis chloris | True Bug |
| Aphis chrysothamni | True Bug |
| Aphis coweni | True Bug |
| Aphis craccae | True Bug |
| Aphis craccivora | True Bug |
| Aphis cytisorum | True Bug |
| Aphis epilobii | True Bug |
| Aphis equiseticola | True Bug |
| Aphis farinosa | True Bug |
| Aphis forbesi | True Bug |
| Aphis galiiscabri | True Bug |
| Aphis genistae | True Bug |
| Aphis hederae | True Bug |
| Aphis helianthi | True Bug |
| Aphis hermistonii | True Bug |
| Aphis idaei | True Bug |
| Aphis lugentis | True Bug |
| Aphis lupini | True Bug |
| Aphis maculatae | True Bug |
| Aphis middletonii | True Bug |
| Aphis nasturtii | True Bug |
| Aphis neilliae | True Bug |
| Aphis nigratibialis | True Bug |
| Aphis oenotherae | True Bug |
| Aphis oregonensis | True Bug |
| Aphis pomi | True Bug |
| Aphis praeterita | True Bug |
| Aphis ribiensis | True Bug |
| Aphis rumicis | True Bug |
| Aphis salicariae | True Bug |
| Aphis sambuci | True Bug |
| Aphis sedi | True Bug |
| Aphis spiraephila | True Bug |
| Aphis vaccinii | True Bug |
| Aphis valerianae | True Bug |
| Aphis varians | True Bug |
| Aphis whiteshellensis | True Bug |
| Aphodius albertanus | Scarab Beetle |
| Aphodius aleutus | Scarab Beetle |
| Aphodius aquilonarius | Scarab Beetle |
| Aphodius bidentatus | Scarab Beetle |
| Aphodius borealis | Scarab Beetle |
| Aphodius browni | Scarab Beetle |
| Aphodius congregatus | Scarab Beetle |
| Aphodius corruptor | Scarab Beetle |
| Aphodius cribratulus | Scarab Beetle |
| Aphodius decipiens | Scarab Beetle |
| Aphodius distinctus | Scarab Beetle |
| Aphodius duplex | Scarab Beetle |
| Aphodius fossor | Scarab Beetle |
| Aphodius granarius | Scarab Beetle |
| Aphodius guttatus | Scarab Beetle |
| Aphodius hamatus hamatus | Scarab Beetle |
| Aphodius hirsutus | Scarab Beetle |
| Aphodius hyperboreus | Scarab Beetle |
| Aphodius leopardus | Scarab Beetle |
| Aphodius omissus omissus | Scarab Beetle |
| Aphodius omissus torpidus | Scarab Beetle |
| Aphodius opacus | Scarab Beetle |
| Aphodius pectoralis | Scarab Beetle |
| Aphodius phaeopterus | Scarab Beetle |
| Aphodius piceatus | Scarab Beetle |
| Aphodius pinguellus | Scarab Beetle |
| Aphodius richardsonae | Scarab Beetle |
| Aphodius rogersi | Scarab Beetle |
| Aphodius sigmoideus | Scarab Beetle |
| Aphodius subaeneus | Scarab Beetle |
| Aphodius tenellus | Scarab Beetle |
| Aphodius vittatus | Scarab Beetle |
| Aphomia cephalonica | Rice Moth |
| Aphomia gularis | Stored Nut Moth |
| Aphorista laeta | Handsome Fungus Beetle |
| Aphrodes bicinctus | True Bug |
| Aphrodes costatus | True Bug |
| Aphrodite japonica | Japanese Sea-Mouse |
| Aphrodite negligens | Dishevelled Sea-Mouse |
| Aphrodite parva | Polychaete Worm |
| Aphrophora ampliata | True Bug |
| Aphrophora canadensis | True Bug |
| Aphrophora fulva | True Bug |
| Aphrophora gelida | True Bug |
| Aphrophora maculosa | True Bug |
| Aphrophora permutata | True Bug |
| Aphrophora princeps | True Bug |
| Aphrophora regina | True Bug |
| Aphthargelia symphoricarpi | True Bug |
| Aphthona cyparissiae | Leaf Beetle |
| Aphthona czwalinae | Leaf Beetle |
| Aphthona flava | Skeletonizing Leaf Beetles and Flea Beetle |
| Aphthona lacertosa | Skeletonizing Leaf Beetles and Flea Beetle |
| Aphthona nigriscutis | Skeletonizing Leaf Beetles and Flea Beetle |
| Apiomerus crassipes crassipes | True Bug |
| Apion alaskanum | Straight-Snouted Weevil |
| Apion antennatum | Straight-Snouted Weevil |
| Apion attenuatum | Straight-Snouted Weevil |
| Apion cavifrons | Straight-Snouted Weevil |
| Apion centrale | Straight-Snouted Weevil |
| Apion cyanitinctum | Straight-Snouted Weevil |
| Apion finitimum | Straight-Snouted Weevil |
| Apion longirostre | Straight-Snouted Weevil |
| Apion pennsylvanicum | Straight-Snouted Weevil |
| Apion proclive | Straight-Snouted Weevil |
| Apion punctinasum | Straight-Snouted Weevil |
| Apion simile | Straight-Snouted Weevil |
| Apistobranchus ornatus | Polychaete Worm |
| Apistobranchus tullbergi | Polychaete Worm |
| Aplectana lynae | Parasite |
| Aploderus linearis | Rove Beetle |
| Aploneura lentisci | True Bug |
| Apochthonius minimus | Pseudoscorpion |
| Apohyale anceps | Amphipod |
| Apohyale californica | Amphipod |
| Apohyale pugettensis | Amphipod |
| Apollophanes margareta | Running Crab Spider |
| Apolochus litoralis | Amphipod |
| Apolochus staudi | Amphipod |
| Apomyelois bistriatella | Moth |
| Aporocotyle macfarlani | Parasite |
| Aporocotyle theragrae | Parasite |
| Aporrectodea caliginosa | Pasture Worm |
| Aporrectodea limicola | Earthworm |
| Aporrectodea trapezoides | Southern Worm |
| Aporrectodea tuberculata | Canadian Worm |
| Apostenus ducati | Liocranid Sac Spider |
| Apote robusta | Robust Anabrus |
| Apotomis albeolana | Moth |
| Apotomis apateticana | Moth |
| Apotomis bifida | Moth |
| Apotomis deceptana | Deceptive Apotomis |
| Apotomis frigidana | Moth |
| Apotomis funerea | Funereal Apotomis |
| Apotomis infida | Moth |
| Apotomis spinulana | Moth |
| Apotomis tertiana | Moth |
| Apotomops wellingtoniana | Moth |
| Appendiseta robiniae | True Bug |
| Apristus pugetanus | Ground Beetle |
| Apteroloma caraboides | Primitive Carrion Beetle |
| Apteroloma tenuicorne | Primitive Carrion Beetle |
| Apterona helicoidella | Moth |
| Aquarius nyctalis | True Bug |
| Arabella iricolor | Polychaete Worm |
| Aradus abbas | True Bug |
| Aradus antennalis | True Bug |
| Aradus approximatus | True Bug |
| Aradus behrensi | True Bug |
| Aradus blaisdelli | True Bug |
| Aradus coarctatus | True Bug |
| Aradus compressus | True Bug |
| Aradus debilis | True Bug |
| Aradus depictus | True Bug |
| Aradus falleni | True Bug |
| Aradus funestus | True Bug |
| Aradus fuscomaculatus | True Bug |
| Aradus heidemanni | True Bug |
| Aradus insolitus | True Bug |
| Aradus intectus | True Bug |
| Aradus kormilevi | True Bug |
| Aradus lugubris lugubris | True Bug |
| Aradus lugubris nigricornis | True Bug |
| Aradus medioximus | True Bug |
| Aradus paganicus | True Bug |
| Aradus parshleyi | True Bug |
| Aradus parvicornis | True Bug |
| Aradus persimilis | True Bug |
| Aradus proboscideus | True Bug |
| Aradus quadrilineatus | True Bug |
| Aradus similis | True Bug |
| Aradus taylori | True Bug |
| Aradus tuberculifer | True Bug |
| Aradus vadosus | True Bug |
| Araecerus fasciculatus | Coffee Bean Weevil |
| Araneus iviei | Angulate & Roundshouldered Orbweaver |
| Araneus montereyensis | Angulate & Roundshouldered Orbweaver |
| Araneus nordmanni | Angulate & Roundshouldered Orbweaver |
| Araneus washingtoni | Angulate & Roundshouldered Orbweaver |
| Araniella proxima | Spider |
| Arboridia betulaspera | True Bug |
| Arboridia insigna | True Bug |
| Arboridia plena | True Bug |
| Arboridia sinua | True Bug |
| Archiboreoiulus pallidus | Millipede |
| Archilestes californicus | California Spreadwing |
| Archips alberta | Moth |
| Archips dissitana | Boldly-marked Archips |
| Archips eleagnana | Moth |
| Archips fervidana | Oak Webworm |
| Archips grisea | Gray Archips |
| Archips mortuana | Moth |
| Archips negundana | Larger Boxelder Leafroller |
| Archips oporana | Moth |
| Archips packardiana | Spring Spruce Needle Moth |
| Archips purpurana | Omnivorous Leafroller |
| Archips striana | Moth |
| Archips tsuganus | Moth |
| Arctella lapponica | Meshweaver |
| Arctia opulenta | Tiger Moth |
| Arctia yarrowii | Moth |
| Arctobius agelenoides | Hackledmesh Weaver |
| Arctobyrrhus subcanus | Pill Beetle |
| Arctocorisa convexa | True Bug |
| Arctocorisa sutilis | True Bug |
| Arctonotus lucidus | Moth |
| Arctopora pulchella | Caddisfly |
| Arctorthezia occidentalis | True Bug |
| Arctosa alpigena | Wolf Spider |
| Arctosa emertoni | Wolf Spider |
| Arctosa insignita | Thinlegged Wolf Spider |
| Arctosa littoralis | Wolf Spider |
| Arctosa raptor | Wolf Spider |
| Arcuatula senhousia | Date Mussel |
| Arcuphantes arcuatulus | Sheetweb Spider |
| Arcuphantes sylvaticus | Sheetweb Spider |
| Arcynopteryx compacta | Stonefly |
| Ardea cinerea | Gray Heron |
| Ardenna gravis | Great Shearwater |
| Arenicola marina | Polychaete Worm |
| Argas cooleyi | Swallow Tick |
| Argas persicus | Bluebug |
| Argenna yakima | Meshweaver |
| Argissa hamatipes | Amphipod |
| Argulus pugettensis | Parasite |
| Argyresthia abies | Moth |
| Argyresthia columbia | Moth |
| Argyresthia conjugella | Apple Fruit Moth |
| Argyresthia cupressella | Moth |
| Argyresthia flexilis | Moth |
| Argyresthia freyella | Moth |
| Argyresthia goedartella | Bronze Alder Moth |
| Argyresthia laricella | Larch Shoot Moth |
| Argyresthia mesocausta | Moth |
| Argyresthia monochromella | Moth |
| Argyresthia oreasella | Cherry Shoot Borer |
| Argyresthia pallidella | Moth |
| Argyresthia pedmontella | Moth |
| Argyresthia picea | Moth |
| Argyresthia pruniella | Cherry Fruit Moth |
| Argyresthia pseudotsuga | Moth |
| Argyresthia pygmaeella | Moth |
| Argyresthia quadristrigella | Moth |
| Argyresthia tsuga | Moth |
| Argyropelecus sladeni | Silvery Hatchetfish |
| Argyroploce externa | Moth |
| Argyrotaenia franciscana | Orange Tortrix |
| Argyrotaenia gogana | Moth |
| Argyrotaenia occultana | Fall Spruce Needle Moth |
| Argyrotaenia pinatubana | Pine Tube Moth |
| Argyrotaenia tabulana | Jack Pine Tube Moth |
| Argyrotaenia velutinana | Red-banded Leafroller |
| Arhopalus foveicollis | Pitted Longhorned Beetle |
| Arhyssus barberi | True Bug |
| Arhyssus crassus | True Bug |
| Arhyssus distinctus | True Bug |
| Arhyssus scutatus | True Bug |
| Arhyssus validus | True Bug |
| Aricidea assimilis | Polychaete Worm |
| Aricidea lopezi | Polychaete Worm |
| Aricidea minuta | Polychaete Worm |
| Aricidea neosuecica | Polychaete Worm |
| Aricidea quadrilobata | Polychaete Worm |
| Aricidea wassi | Polychaete Worm |
| Arion circumscriptus | Brown-Banded Arion |
| Arion distinctus | Darkface Arion |
| Arion silvaticus | Forest Arion |
| Aristias pacificus | Amphipod |
| Aristias veleronis | Amphipod |
| Aristostomias scintillans | Shining Loosejaw |
| Aristotelia devexella | Moth |
| Aristotelia fungivorella | Moth |
| Aristotelia isopelta | Moth |
| Aristotelia roseosuffusella | Moth |
| Aristotelia rubidella | Moth |
| Armadillidium vulgare | Common Pill-bug |
| Armadilloniscus holmesi | Isopod |
| Arocatus melanocephalus | Elm Seed Bug |
| Aroga websteri | Moth |
| Arpedium cribratum | Ocellate Rove Beetle |
| Arrhenopeplus tesserula | Rove Beetle |
| Arta epicoenalis | Moth |
| Arta statalis | Posturing Arta |
| Artacama conifera | Polychaete Worm |
| Arthropoma cecili | Bryozoa |
| Artochia productifrons | Rove Beetle |
| Arytainilla spartiophila | Broom Psyllid |
| Asabellides lineata | Polychaete Worm |
| Asabellides sibirica | Polychaete Worm |
| Asaphidion yukonense | Round Sand Beetle |
| Asaphocrita aphidiella | Moth |
| Asaphocrita irenica | Moth |
| Asbestopluma biserialis | Sponge |
| Ascaridia columbae | Parasite |
| Ascaridia galli | Parasite |
| Ascaridia hermaphrodita | Parasite |
| Ascaridia platyceri | Parasite |
| Ascaris suum | Parasite |
| Ascarophis sebastodis | Parasite |
| Ascelichthys rhodorus | Rosylip Sculpin |
| Aschedelphax hochae | True Bug |
| Asciodema obsoletum | True Bug |
| Asclera excavata | False Blister Beetle |
| Asclera nigra | False Blister Beetle |
| Asclerocheilus beringanus | Polychaete Worm |
| Asemobius caelatus | Rove Beetle |
| Asemoplus montanus | Montana Grasshopper |
| Asemum nitidum | Elderberry Longhorn Beetle |
| Aseptis characta | Cutworm Moth |
| Aseptis fumosa | Moth |
| Asiocnemis basalis | False Click Beetle |
| Asiocnemis hospitalis | False Click Beetle |
| Asiocnemis nitens | False Click Beetle |
| Asiphonaphis pruni | True Bug |
| Aspiculuris tetraptera | Parasite |
| Aspidophorodon longicaudus | True Bug |
| Aspitates aberrata | Moth |
| Aspitates orciferaria | Moth |
| Aspitates taylori | Moth |
| Astarte arctica | Astarte Clam |
| Astarte compacta | Compact Astarte |
| Astarte crenata | Crenulate Astarte |
| Astarte undata | Clam |
| Astenus cinctus | Spiny-legged Rove Beetle |
| Astenus longiusculus | Rove Beetle |
| Asterodiaspis variolosa | True Bug |
| Asteronyx loveni | Snake Brittle Star |
| Astroschema sublaeve | Brittle Star |
| Astrotischeria occidentalis | Moth |
| Astyris gausapata | Shaggy Dovesnail |
| Asynarchus aldinus | Caddisfly |
| Asynarchus cinnamoneus | Caddisfly |
| Asynarchus lapponicus | Caddisfly |
| Asynarchus mutatus | Caddisfly |
| Atalopedes campestris campestris | Sachem |
| Atherinops affinis | Topsmelt |
| Atheroides serrulatus | True Bug |
| Atheta basicornis | Rove Beetle |
| Atheta brumalis | Rove Beetle |
| Atheta celata | Rove Beetle |
| Atheta cheersae | Rove Beetle |
| Atheta concessa | Rove Beetle |
| Atheta districta | Rove Beetle |
| Atheta fanatica | Rove Beetle |
| Atheta formalis | Rove Beetle |
| Atheta frosti | Rove Beetle |
| Atheta graminicola | Rove Beetle |
| Atheta hampshirensis | Rove Beetle |
| Atheta holmbergi | Rove Beetle |
| Atheta irrupta | Rove Beetle |
| Atheta keeni | Rove Beetle |
| Atheta klagesi | Rove Beetle |
| Atheta longicornis | Rove Beetle |
| Atheta metlakatlana | Rove Beetle |
| Atheta nescia | rove beetle |
| Atheta pacifica | Rove Beetle |
| Atheta picipennis | Rove Beetle |
| Atheta platonoffi | Rove Beetle |
| Atheta prudhoensis | Rove Beetle |
| Atheta relicta | Rove Beetle |
| Atheta remulsa | Rove Beetle |
| Atheta ringi | Rove Beetle |
| Atheta rurigena | Rove Beetle |
| Atheta stercoris | Rove Beetle |
| Atheta strigosula | Rove Beetle |
| Atheta subrugosa | Rove Beetle |
| Atheta surgens | Rove Beetle |
| Atheta ventricosa | Rove Beetle |
| Atheta vicaria | Rove Beetle |
| Athetalia metlakatlana | Rove Beetle |
| Athetalia nimia | Rove Beetle |
| Athetota atriventris | Rove Beetle |
| Athetota wickhami | Rove Beetle |
| Atholus bimaculatus | Clown Beetle |
| Atholus falli | Clown Beetle |
| Athous rufiventris rufiventris | Glowing Click Beetle |
| Athrips rancidella | Cotoneaster Webworm |
| Athysanella acuticauda | True Bug |
| Athysanella attenuata | True Bug |
| Athysanella obesa | True Bug |
| Athysanella robusta | True Bug |
| Athysanella utahna | True Bug |
| Atimia hoppingi | Longhorned Beetle |
| Atomaria atrata | Silken Fungus Beetle |
| Atomaria capitata | Silken Fungus Beetle |
| Atomaria ephippiata | Silken Fungus Beetle |
| Atomaria kamtschatica | Silken Fungus Beetle |
| Atomaria laetula | Silken Fungus Beetle |
| Atomaria longipennis | Silken Fungus Beetle |
| Atomaria melanica | Silken Fungus Beetle |
| Atomaria nubipennis | Silken Fungus Beetle |
| Atomaria planulata | Silken Fungus Beetle |
| Atomaria pusilla | Silken Fungus Beetle |
| Atomaria quadricollis | Silken Fungus Beetle |
| Atomaria stricticollis | Silken Fungus Beetle |
| Atomaria subdentata | Silken Fungus Beetle |
| Atomaria vespertina | Silken Fungus Beetle |
| Atomoscelis onustus | True Bug |
| Atractoscion nobilis | White Seabass |
| Atractotomus atricolor | True Bug |
| Atractotomus cercocarpi | True Bug |
| Atractotomus cooperi | True Bug |
| Atractotomus kolenatii | True Bug |
| Atractotomus mali | True Bug |
| Atractotomus rubidus | True Bug |
| Atrecus macrocephalus | Crab-like Rove Beetle |
| Atrecus quadripennis | Rove Beetle |
| Attagenus pellio | Carpet Beetle |
| Attagenus schaefferi hypar | Carpet Beetle |
| Attagenus unicolor japonicus | Carpet Beetle |
| Attagenus unicolor unicolor | Beetle |
| Attalus morulus | Soft-Winged Flower Beetle |
| Attalus nigrellus | Soft-Winged Flower Beetle |
| Attalus nigrinus | Soft-winged Flower Beetle |
| Attenella marginata | Mayfly |
| Atylotus calcar | Fly |
| Atylotus tinguareus | Fly |
| Atyloyus insuetus | Fly |
| Atyloyus sublunaticornis | Fly |
| Atylus borealis | Amphipod |
| Atylus georgianus | Amphipod |
| Atylus tridens | Amphipod |
| Aufeius impressicollis | True Bug |
| Aulacorthum dorsatum | True Bug |
| Aulacorthum pterinigrum | True Bug |
| Aulacorthum solani | True Bug |
| Aulactinia incubans | Incubating Anemone |
| Auletobius congruus | Leaf And Bud Weevil |
| Auleutes epilobii | Minute Seed Weevil |
| Auleutes nebulosus | Snout Beetle |
| Aulocara elliotti | Grasshopper |
| Aulonium longum | Cylindrical Bark Beetle |
| Auridius auratus | True Bug |
| Auridius helvus | True Bug |
| Auridius ordinatus | True Bug |
| Austroneaera semipellucida | Cuspidaria Clam |
| Austrotindaria gibbsii | Clam |
| Austrotyla borealis | Millipede |
| Autalia brevicornis | Rove Beetle |
| Autalia puncticollis | Rove Beetle |
| Autalia rivularis | Rove Beetle |
| Autalia truncatula | Rove Beetle |
| Autographa buraetica | Cutworm Moth |
| Autographa flagellum | Silver Whip |
| Autographa rubidus | Cutworm Moth |
| Autographa sansoni | Cutworm Moth |
| Autographa speciosa | Moth |
| Autographa v-alba | Cutworm Moth |
| Autolytus cornutus | Polychaete Worm |
| Autolytus magnus | Noble Necklace-Worm |
| Autolytus prismaticus | Polychaete Worm |
| Autolytus verrilli | Polychaete Worm |
| Avocettina infans | Avocet Snipe-Eel |
| Axinopalpus biplagiatus | Flat-horned Ground Beetle |
| Axinotarsus pulicarius | Soft-winged Flower Beetle |
| Axocielita originalis | Sponge |
| Bactericera cockerelli | True Bug |
| Bactra furfurana | Moth |
| Bactra lancealana | Black-blotched Bactra |
| Bactra verutana | Javelin Moth |
| Bactridium ephippigerum | Minute Clubbed Beetle |
| Badister ferrugineus | Colorful Foliage Ground Beetle |
| Badister grandiceps | Colorful Foliage Ground Beetle |
| Badister obtusus | Ground Beetle |
| Badister parviceps | Colorful Foliage Ground Beetle |
| Baeocera congenera | Shining Fungus Beetle |
| Baeocera humeralis | Shining Fungus Beetle |
| Baetis bundyae | Mayfly |
| Baetis moffatti | Mayfly |
| Baetis parallelus | Mayfly |
| Baetis persecutor | Mayfly |
| Bagous nebulosus | Snout and Bark Beetle |
| Bagous restrictus | Snout and Bark Beetle |
| Bagous transversus | Snout and Bark Beetle |
| Bakerella muscotana | True Bug |
| Balanus balanus | Northern Barnacle |
| Balcanocerus provancheri | True Bug |
| Balclutha confluens | True Bug |
| Balclutha impicta | True Bug |
| Balclutha manitou | True Bug |
| Balclutha neglecta | True Bug |
| Balclutha punctata | True Bug |
| Ballana calipera | True Bug |
| Ballana chelata | True Bug |
| Ballana hebea | True Bug |
| Ballana ortha | True Bug |
| Ballana remissa | True Bug |
| Ballana titusi | True Bug |
| Balticina californica | Pennatulacean |
| Banasa calva | True Bug |
| Bandera binotella | Moth |
| Bandera virginella | Moth |
| Bankia fimbriatula | Fimbriate Shipworm |
| Barantolla americana | Polychaete Worm |
| Barbara mappana | Moth |
| Barbourisia rufa | Velvet Whalefish |
| Barce fraterna | True Bug |
| Barentsia gracilis | Entoproct |
| Barentsia ramosa | Entoproct |
| Barentsia robusta | Entoproct |
| Baris stacesmithi | Snout Beetle |
| Barleeia haliotiphila | Abalone Barleysnail |
| Barynotus obscurus | Snout Beetle |
| Barypeithes pellucidus | Snout Beetle |
| Baryphyma trifrons | Spider |
| Baseodiscus princeps | Ribbon Worm |
| Basilinna xantusii | Xantus's Hummingbird |
| Bassaniana utahensis | Bark Crab Spider |
| Bathophilus flemingi | Highfin Dragonfish |
| Bathyagonus alascanus | Gray Starsnout |
| Bathyagonus nigripinnis | Blackfin Poacher |
| Bathyarca nucleator | Ark |
| Bathycrinus pacificus | Ten-Armed Abyssal Sea Lily |
| Bathylagus pacificus | Slender Blacksmelt |
| Bathylychnops exilis | Javelin Spookfish |
| Bathymedon nanseni | Amphipod |
| Bathyneaera tillamookensis | Cuspidaria Clam |
| Bathypathes patula | Black Coral |
| Bathyphantes alameda | Sheetweb Spider |
| Bathyphantes alascensis | Sheetweb Spider |
| Bathyphantes brevipes | Sheetweb Spider |
| Bathyphantes brevis | Sheetweb Spider |
| Bathyphantes canadensis | Sheetweb Spider |
| Bathyphantes diasosnemus | Sheetweb Spider |
| Bathyphantes eumenis | Sheetweb Spider |
| Bathyphantes keeni | Spider |
| Bathyphantes malkini | Sheetweb Spider |
| Bathyphantes orica | Sheetweb Spider |
| Bathyphantes pallidus | Sheetweb Spider |
| Bathyphantes reprobus | Sheetweb Spider |
| Bathyphantes waneta | Sheetweb Spider |
| Bathyraja abyssicola | Deepsea Skate |
| Bathysoecia bassleri | Bryozoa |
| Batrachedra curvilineella | Moth |
| Batrachedra praeangusta | Moth |
| Batrachedra striolata | Moth |
| Batracobdella picta | Freshwater Leech |
| Batrisodes lineaticollis | Ant-loving Beetle |
| Battaristis concinnusella | Moth |
| Baylisascaris procyonis | Parasite |
| Beania columbiana | Bryozoa |
| Beania mirabilis | Bryozoa |
| Bedellia somnulentella | Morning-glory Leafminer |
| Beeria nematocera | Large Rove Beetle |
| Belostoma flumineum | True Bug |
| Bembidion actuosum | Round Sand Beetle |
| Bembidion acutifrons | Ground Beetle |
| Bembidion aeneicolle | Round Sand Beetle |
| Bembidion arcticum | Ground Beetle |
| Bembidion bifossulatum | Round Sand Beetle |
| Bembidion bowditchii | Ground Beetle |
| Bembidion brachythorax | Ground Beetle |
| Bembidion breve | Round Sand Beetle |
| Bembidion canadianum | Ground Beetle |
| Bembidion carinula | Round Sand Beetle |
| Bembidion castum | Ground Beetle |
| Bembidion commotum | Round Sand Beetle |
| Bembidion concolor | Round Sand Beetle |
| Bembidion concretum | Round Sand Beetle |
| Bembidion convexulum | Round Sand Beetle |
| Bembidion diligens | Round Sand Beetle |
| Bembidion disjunctum | Ground Beetle |
| Bembidion dorsale | Ground Beetle |
| Bembidion dyschirinum | Round Sand Beetle |
| Bembidion erasum | Ground Beetle |
| Bembidion farrarae | Round Sand Beetle |
| Bembidion flohri | Round Sand Beetle |
| Bembidion fortestriatum | Round Sand Beetle |
| Bembidion frontale | Round Sand Beetle |
| Bembidion gebleri turbatum | Ground Beetle |
| Bembidion gordoni | Round Sand Beetle |
| Bembidion grapii | Round Sand Beetle |
| Bembidion gratiosum | Round Sand Beetle |
| Bembidion hastii | Round Sand Beetle |
| Bembidion hesperium | Ground Beetle |
| Bembidion inaequale | Round Sand Beetle |
| Bembidion inaequale opaciceps | Ground Beetle |
| Bembidion incrematum | Round Sand Beetle |
| Bembidion indistinctum | Round Sand Beetle |
| Bembidion insulatum | Round Sand Beetle |
| Bembidion kalumae | Ground Beetle |
| Bembidion lapponicum | Round Sand Beetle |
| Bembidion levettei | Round Sand Beetle |
| Bembidion levettei carrianum | Beetle |
| Bembidion levettei levettei | Beetle |
| Bembidion lindrothellum | Ground Beetle |
| Bembidion lummi | Ground Beetle |
| Bembidion manningense | Ground Beetle |
| Bembidion morulum | Ground Beetle |
| Bembidion mundum | Round Sand Beetle |
| Bembidion mutatum | Round Sand Beetle |
| Bembidion nebraskense | Round Sand Beetle |
| Bembidion nevadense | Round Sand Beetle |
| Bembidion nigripes | Round Sand Beetle |
| Bembidion nigrocoeruleum | Ground Beetle |
| Bembidion oblonguloides | Ground Beetle |
| Bembidion oblongulum | Ground Beetle |
| Bembidion obscurellum | Round Sand Beetle |
| Bembidion obscurellum obscurellum | Beetle |
| Bembidion obtusangulum | Round Sand Beetle |
| Bembidion patruele | Round Sand Beetle |
| Bembidion petrosum petrosum | Ground Beetle |
| Bembidion platynoides | Round Sand Beetle |
| Bembidion praticola | Round Sand Beetle |
| Bembidion pseudocautum | Round Sand Beetle |
| Bembidion quadrifoveolatum | Round Sand Beetle |
| Bembidion quadrimaculatum dubitans | Round Sand Beetle |
| Bembidion recticolle | Ground Beetle |
| Bembidion rosslandicum | Ground Beetle |
| Bembidion rusticum lenensoides | Ground Beetle |
| Bembidion salinarium | Ground Beetle |
| Bembidion scopulinum | Round Sand Beetle |
| Bembidion sequoiae | Ground Beetle |
| Bembidion sierricola | Ground Beetle |
| Bembidion sordidum | Round Sand Beetle |
| Bembidion spectabile | Ground Beetle |
| Bembidion striola | Ground Beetle |
| Bembidion sulcipenne prasinoides | Round Sand Beetle |
| Bembidion tetracolum | Round Sand Beetle |
| Bembidion tetracolum tetracolum | Beetle |
| Bembidion tigrinum | Round Sand Beetle |
| Bembidion timidum | Round Sand Beetle |
| Bembidion transparens transparens | Beetle |
| Bembidion umbratum | Ground Beetle |
| Bembidion viator | Ground Beetle |
| Bembidion vile | Ground Beetle |
| Bembidion yukonum | Round Sand Beetle |
| Bembidion zephyrum | Round Sand Beetle |
| Bemlos concavus | Amphipod |
| Benjaminiola colorada | Cutworm Moth |
| Benthalbella dentata | Northern Pearleye |
| Benthalbella linguidens | Longfin Pearleye |
| Bentheogennema borealis | Northern Blunt-Tailed Shrimp |
| Bentheogennema burkenroadi | Burkenroad's Blunt-Tailed Shrimp |
| Bentheuphausia amblyops | Deepsea Krill |
| Bentheuphausia amblyops | Snapping Shrimp |
| Benthoctopus abruptus | Octopus |
| Benthoctopus profundum | Octopus |
| Benthodesmus pacificus | North Pacific Frostfish |
| Benthodesmus tenuis | Javelinfish |
| Benthopecten claviger claviger | Sea Star |
| Benthopecten mutabilis | Sea Star |
| Berardius bairdii | Northern Pacific Bottle-Nosed Whale |
| Beringius crebicostatus | Thick-Ribbed Whelk |
| Beroe cucumis | Sea Gooseberry |
| Berosus fraternus | Minute Mud-loving Beetle |
| Berosus hatchi | Minute Mud-loving Beetle |
| Berosus sayi | Minute Mud-loving Beetle |
| Berosus striatus | Water Scavenger Beetle |
| Berryteuthis anonychus | Minimal Armhook Squid |
| Betapista dekkerae | Polychaete Worm |
| Betocalea pacifica | Rove Beetle |
| Betulaphis brevipilosa | True Bug |
| Betulaphis quadrituberculata | True Bug |
| Betulapion simile walshii | Beetle |
| Bibarrambla allenella | Bog Bibarrambla |
| Bicellariella brevispina | Bryozoa |
| Bicellariella ciliata | Bryozoa |
| Bicellariella stolonifera | Bryozoa |
| Bicidium aequoreae | Parasitic Anemone |
| Bicrisia edwardsiana | Bryozoa |
| Bimastos lawrenceae | Earthworm |
| Bipersona ochrocentri | True Bug |
| Bisnius albionicus | Rove Beetle |
| Bisnius bion | Rove Beetle |
| Bisnius cephalotes | Rove Beetle |
| Bisnius crestonensis | Rove Beetle |
| Bisnius epeus | Rove Beetle |
| Bisnius hesperidum | Rove Beetle |
| Bisnius instabilis | Rove Beetle |
| Bisnius parcus | Rove Beetle |
| Bisnius picicornis | Rove Beetle |
| Bisnius pugetensis | Rove Beetle |
| Bisnius rainieri | Rove Beetle |
| Bisnius siegwaldii | Large Rove Beetle |
| Bisnius sordidus | Beetle |
| Bisnius stacesmithi | Rove Beetle |
| Bisnius tereus | Rove Beetle |
| Bisnius versutus | Rove Beetle |
| Bispira crassicornis | Polychaete Worm |
| Bispira pacifica | Polychaete Worm |
| Bittium challisae | Horn Snail |
| Bius estriatus | Dune Beetle |
| Blabomma californicum | Meshweaver |
| Blapstinus discolor | Desert Stink Beetle |
| Blapstinus intermixtus | Darkling Beetle |
| Blapstinus metallicus | Desert Stink Beetle |
| Blapstinus pulverulentus | Darkling Beetle |
| Blapstinus substriatus | Desert Stink Beetle |
| Blastobasis glandulella | Acorn Moth |
| Bledius albonotatus | Rove Beetle |
| Bledius annularis | Spiny-legged Rove Beetle |
| Bledius aquilonarius | Rove Beetle |
| Bledius confusus | Rove Beetle |
| Bledius coulteri | Rove Beetle |
| Bledius flavipennis | Rove Beetle |
| Bledius foraminosus | Rove Beetle |
| Bledius gravidus | Rove Beetle |
| Bledius habrus | Rove Beetle |
| Bledius longipennis | Rove Beetle |
| Bledius monstratus | Spiny-legged Rove Beetle |
| Bledius mysticus | Rove Beetle |
| Bledius nardus | Rove Beetle |
| Bledius opacifrons | Rove Beetle |
| Bledius ruficornis | Rove Beetle |
| Bledius strenuus | Rove Beetle |
| Bledius suturalis | Rove Beetle |
| Bledius tarandus | Rove Beetle |
| Bledius turgidus | Rove Beetle |
| Bledius viriosus | Rove Beetle |
| Bledius washingtonensis | Rove Beetle |
| Bledius zophus | Rove Beetle |
| Blepharidopterus angulatus | True Bug |
| Blepharidopterus diaphanus | True Bug |
| Blepharidopterus provancheri | True Bug |
| Blethisa hudsonica | American Diminutive Tiger Beetle |
| Blethisa multipunctata aurata | American Diminutive Tiger Beetle |
| Blethisa oregonenis | Ground Beetle |
| Blethisa quadricollis | American Diminutive Tiger Beetle |
| Blissus occiduus | True Bug |
| Boccardia columbiana | Polychaete Worm |
| Boccardia hamata | Polychaete Worm |
| Boccardia polybranchia | Polychaete Worm |
| Boccardia proboscoidea | Polychaete Worm |
| Boccardia pugettensis | Polychaete Worm |
| Boernerina alni alaskensis | True Bug |
| Boernerina occidentalis | True Bug |
| Boernerina variabilis | True Bug |
| Bohemannia pulverosella | Moth |
| Bolboceras obesus | Scarab Beetle |
| Bolitobius cingulatus | Crab-like Rove Beetle |
| Bolitobius kremeri | Rove Beetle |
| Bolitochara arcuata | Rove Beetle |
| Bolitochara carlottae | Rove Beetle |
| Bolitochara densicollis | Rove Beetle |
| Bolitopunctus muricatulus | Rove Beetle |
| Bollmaniulus hewitti | Millipede |
| Bollmaniulus spenceri | Millipede |
| Boloria bellona toddi | Meadow Fritillary |
| Boloria epithore sigridae | Western Meadow Fritillary |
| Boloria eunomia nichollae | Nichollae's Fritillary |
| Boloria natazhati | Beringian Fritillary |
| Boloria natazhati nabokovi | Beringian Fritillary |
| Boloria polaris polaris | Polar Fritillary |
| Bolshecapnia gregsoni | Stonefly |
| Bolshecapnia milami | Stonefly |
| Bolshecapnia rogozeri | Stonefly |
| Bolshecapnia sasquatchi | Stonefly |
| Bolshecapnia spenceri | Stonefly |
| Boltenia echinata | Solitary Ascidian |
| Bombus ashtoni | Cuckoo Bumble Bee |
| Bombus balteatus | Bumble Bee |
| Bombus fernaldae | Cuckoo Bumble Bee |
| Bombus hyperboreus | Alaska Arctic Bumble Bee |
| Bombus lapponicus | Bumble Bee |
| Bombus lucorum | Buff-tailed Bumble Bee |
| Bombus morrisoni | Morrison's Bumble Bee |
| Bombus neoboreus | Bumble Bee |
| Bombus perplexus | Preplexing Bumble Bee |
| Bombus polaris | Bumble Bee |
| Bombus vandykei | Vandyke's Bumble Bee |
| Boreaphilus henningianus | Rove Beetle |
| Boreonectes griseostriatus | Predaceous Diving Beetle |
| Boreonectes spenceri | Predaceous Diving Beetle |
| Boreotrophon coronatus | Crown Trophon |
| Boreotrophon macouni | Corded Trophon |
| Boreus elegans | Snow Scorpionfly |
| Boreus insulanus | Snow Scorpionfly |
| Boreus nix | Snow Scorpionfly |
| Boreus pilosus | Snow Scorpionfly |
| Boreus reductus | Snow Scorpionfly |
| Boschella fasciata | Checkered Beetle |
| Bothriocephalus opsariichthydis | Parasite |
| Bothriocephalus scorpii | Parasite |
| Bothriocephalus strobilia | Parasite |
| Bothrocara molle | Soft Eelpout |
| Bothrocara pusillum | Alaska Eelpout |
| Bothropolys columbiensis | Centipede |
| Bothropolys ethus | Centipede |
| Bothropolys hoples | Centipede |
| Bothropolys victorianus | Centipede |
| Bothynotus pilosus | True Bug |
| Botocudo modestus | True Bug |
| Botruanthus benedeni | Tube Anemone |
| Bousfieldia mammalidacta | Amphipod |
| Bouvierella carcinophila | Amphipod |
| Bowerbankia gracilis aggregata | Bryozoa |
| Bowerbankia gracilis gracilis | Tubeworm Fuzz |
| Brachiacantha uteella | Spurleg Lady Beetle |
| Brachinus cyanochroaticus | Bombardier Beetle |
| Brachinus fumans | Bombardier Beetle |
| Brachinus medius | Bombardier Beetle |
| Brachinus quadripennis | Bombardier Beetle |
| Brachycaudus cardui | True Bug |
| Brachycaudus rumexicolens | True Bug |
| Brachycentrus americanus | Caddisfly |
| Brachycentrus occidentialis | Caddisfly |
| Brachycepsis pacifica | Rove Beetle |
| Brachycepsis rothi | Rove Beetle |
| Brachycoryna hardyi | Tortoise Beetles and the Hispine |
| Brachycoryna montana | Leaf Beetle |
| Brachycorynella asparagi | True Bug |
| Brachydesmus superus | Millipede |
| Brachylomia algens | Cutworm Moth |
| Brachylomia discinigra | Cutworm Moth |
| Brachymyrmex depilis | Yellow Ant |
| Brachynemurus peregrinus | Antlion |
| Brachypera zoilus | Weevil |
| Brachypterus globularius | Sap-Feeding Beetle |
| Brachypterus troglodytes | Short-winged Flower Beetle |
| Brachypterus urticae | Sap-Feeding Beetle |
| Brachyramphus brevirostris | Kittlitz's Murrelet |
| Brachys aerosus | Metallic Wood-boring Beetle |
| Brachyscelus crusculum | Amphipod |
| Brachysiphum thalictri | True Bug |
| Brachyusa americana | Rove Beetle |
| Brada sachalina | Polychaete Worm |
| Brada villosa | Polychaete Worm |
| Bradycellus californicus | False Bombardier Beetle |
| Bradycellus congener | False Bombardier Beetle |
| Bradycellus neglectus | False Bombardier Beetle |
| Bradycellus nigrinus | False Bombardier Beetle |
| Bradycellus nubifer | False Bombardier Beetle |
| Bradycellus politus | False Bombardier Beetle |
| Bradynotes obesa | Mountain Kubber Grasshopper |
| Bradynotes obesa caurus | Mountain Kubber Grasshopper |
| Branchinecta campestris | Pocket Pouch Fairy Shrimp |
| Branchiomaldane vincentii | Polychaete Worm |
| Brania brevipharyngea | Polychaete Worm |
| Brassicogethes aeneus | Sap-feeding Beetle |
| Brassicogethes cleominis | Pollen Beetle |
| Brevicoryne brassicae | True Bug |
| Briarosaccus callosus | King Grab Parasitic Barnacle |
| Brochymena quadripustulata | True Bug |
| Bromius obscurus | Western Grape Rootworm |
| Brommella monticola | Meshweaver |
| Brooksetta inconspicua | True Bug |
| Brooksetta incurva | True Bug |
| Brooksetta viridicata | True Bug |
| Broscodera insignis | Bombardier Beetle |
| Bruceia pulverina | Powdered Lichen Moth |
| Bruchus pisorum | Pea Weevil |
| Brumoides histrio | Lady Beetle |
| Brumoides septentrionis septentrionis | Lady Beetle |
| Bruneria brunnea | Grasshopper |
| Brunsonia albertana | Millipede |
| Brunsonia atrolineata | Millipede |
| Bruzelia tuberculata | Amphipod |
| Brychius hornii | Crawling Water Beetle |
| Brychius pacificus | Crawling Water Beetle |
| Brymblia quadrimaculella | Moth |
| Bryobiota bicolor | Rove Beetle |
| Bryophacis biseriatus | Rove Beetle |
| Bryophacis canadensis | Rove Beetle |
| Bryophacis discalis | Rove Beetle |
| Bryophacis punctatissimus | Rove Beetle |
| Bryophacis rubescens | Rove Beetle |
| Bryophacis smetanai | Rove Beetle |
| Bryoporus rubescens | Rove Beetle |
| Bryoporus rufescens | Crab-like Rove Beetle |
| Bryoporus varians | Rove Beetle |
| Bryotropha gemella | Moth |
| Bryotropha hodgesi | Moth |
| Bryotropha plantariella | Moth |
| Bryotropha similis | Moth |
| Bryozoichthys marjorius | Pearly Prickleback |
| Bucculatrix ainsliella | Oak Skeletonizer |
| Bucculatrix angustisquamella | Moth |
| Bucculatrix arnicella | Moth |
| Bucculatrix canadensisella | Birch Skeletonizer |
| Bucculatrix columbiana | Moth |
| Bucculatrix divisa | Moth |
| Bucculatrix eurotiella | Moth |
| Bucculatrix frigida | Moth |
| Bucculatrix pomifoliella | Moth |
| Bucculatrix salutatoria | Moth |
| Bucculatrix seorsa | Moth |
| Bucculatrix tridenticola | Moth |
| Bucculatrix zophopasta | Moth |
| Buckellacris chilcotinae | Short-horned Grasshopper |
| Buckellacris chilcotinae chilcotinae | Grasshopper |
| Buckellacris hispida | Grasshopper |
| Buckellacris nuda nuda | Grasshopper |
| Buenoa macrotibialis | True Bug |
| Bugula avicularia | Bryozoa |
| Bugula cucullifera | Bryozoa |
| Bugula longirostrata | Bryozoa |
| Bugula pacifica | Bryozoa |
| Bugula pugeti | Bryozoa |
| Bulia deducta | Cutworm Moth |
| Bunodera luciopercae | Parasite |
| Buprestis haemorrhoidalis | Metallic Wood-boring Beetle |
| Buprestis langii | Metallic Wood-boring Beetle |
| Buprestis maculativentris | Spotted-belly Buprestid |
| Buprestis nutalli | Metallic Wood-boring Beetle |
| Buskia nitens | Bryozoa |
| Byblis longispina | Amphipod |
| Byblis veleronis | Amphipod |
| Bylgides elegans | Elegant Fifteen Scaled Worm |
| Bylgides macrolepidus | Large-Eyed Fifteen Scaled Worm |
| Bythotiara depressa | Jellyfish |
| Caballeronema wardlei | Parasite |
| Cabera borealis | Moth |
| Cabera exanthemata | Moth |
| Cabera variolaria | Vestal Moth |
| Caberea boryi | Bryozoa |
| Caberea ellisi | Bryozoa |
| Cacopsylla coryli | True Bug |
| Cacopsylla fatsiae | True Bug |
| Cacopsylla latiforceps | True Bug |
| Cacopsylla magnicauda | True Bug |
| Cacopsylla minor | True Bug |
| Cacopsylla parallela | True Bug |
| Cacopsylla peregrina | True Bug |
| Cacopsylla pyricola | True Bug |
| Cacopsylla striata | True Bug |
| Cacopsylla stricklandi | True Bug |
| Cacotherapia leucocope | Moth |
| Cadlina modesta | Modest Cadlina |
| Cadra cautella | Almond Moth |
| Caecidotea tomalensis | Isopod |
| Caecum crebricinctum | Many-Named Caecum |
| Caelius montana | Scarab Beetle |
| Caelius rufescens | Scarab Beetle |
| Caenis amica | Mayfly |
| Caenis youngi | Mayfly |
| Caenoscelis antennalis | Silken Fungus Beetle |
| Caenoscelis ferruginea | Silken Fungus Beetle |
| Caenoscelis parallela | Silken Fungus Beetle |
| Caenurgina caerulea | Cutworm Moth |
| Caesia fossatus | Giant Western Nassa |
| Cafius canescens | Large Rove Beetle |
| Cafius femoralis | Large Rove Beetle |
| Cafius lithocharinus | Large Rove Beetle |
| Cafius luteipennis | Large Rove Beetle |
| Cafius nudus johnsoni | Rove Beetle |
| Cafius seminitens | Large Rove Beetle |
| Caladonus coquilletti | True Bug |
| Calamosternus granarius | Hide Beetle |
| Calanana rubralineata | True Bug |
| Calaphis betulaecolens | True Bug |
| Calaphis betulicola | True Bug |
| Calaphis flava | True Bug |
| Calastacus stilirostris | Mud Shrimp |
| Calathus calceus | Western False-form Beetle |
| Calathus ruficollis grandicollis | Western False-form Beetle |
| Calcigorgia kinoshitae | Coral |
| Calidris maritima | Purple Sandpiper |
| Calidris pygmea | Spoonbill Sandpiper |
| Calidris temminckii | Temminck's Stint |
| Calidris tenuirostris | Great Knot |
| Caligodorus opacus | Hide Beetle |
| Calineuria californica | Stonefly |
| Caliroa cerasi | Pear Sawfly |
| Calitys minor | Bark-gnawing Beetle |
| Calleida viridis amoena | Ground Beetle |
| Callianax pycna | Zigzag Olive |
| Callicorixa alaskensis | True Bug |
| Callicorixa audeni | True Bug |
| Callicorixa scudderi | True Bug |
| Callicorixa vulnerata | True Bug |
| Calligrapha californica californica | Scriptured Leaf Beetle |
| Calligrapha lunata | Leaf Beetle |
| Calligrapha multipunctata | Leaf Beetle |
| Calligrapha philadelphica | Leaf Beetle |
| Calligrapha sigmoidea | Scriptured Leaf Beetle |
| Calligrapha verrucosa | Scriptured Leaf Beetle |
| Callilepis eremella | Ground Spider |
| Callilepis pluto | Ground Spider |
| Calliopius behringi | Amphipod |
| Calliopius carinatus | Amphipod |
| Calliopius columbianus | Amphipod |
| Calliopius pacificus | Amphipod |
| Calliostoma bernardi | Bernard's Shiny White Top Shell |
| Callipterinella calliptera | True Bug |
| Callipterinella minutissima | True Bug |
| Callithaca tenerrima | Thin-Shell Littleneck Clam |
| Callobius canada | Hackledmesh Weaver |
| Callobius enus | Hackledmesh Weaver |
| Callobius nomeus | Hackledmesh Weaver |
| Callophrys iroides iroides | Western Elfin |
| Callophrys mossii schryveri | Moss' Elfin |
| Callophrys nelsoni rosneri | Cedar Hairstreak |
| Callophrys niphon | Eastern Pine Elfin |
| Callophrys niphon clarki | Eastern Pine Elfin |
| Callopora armata | Bryozoa |
| Callopora exilis | Bryozoa |
| Callopora horrida | Bryozoa |
| Callopora inconspicua | Bryozoa |
| Callopora lineata | Bryozoa |
| Calocarides quinqueseriatus | Keeled Mud Lobster |
| Calocarides spinulicauda | Shrimp |
| Calochromus dimidiatus | Net-winged Beetle |
| Calochromus fervens | Net-winged Beetle |
| Calophasia lunula | Cutworm Moth |
| Caloptilia acerifoliella | Moth |
| Caloptilia agrifoliella | Moth |
| Caloptilia alnicolella | Moth |
| Caloptilia alnivorella | Alder Leafminer |
| Caloptilia burgessiella | Moth |
| Caloptilia cornusella | Moth |
| Caloptilia coroniella | Moth |
| Caloptilia glutinella | Moth |
| Caloptilia invariabilis | Cherry Leaf-cone Caterpillar Moth |
| Caloptilia melanocarpae | Moth |
| Caloptilia murtfeldtella | Moth |
| Caloptilia pulchella | Moth |
| Caloptilia rhoifoliella | Sumac Leafblotch Miner |
| Caloptilia sanguinella | Moth |
| Caloptilia serotinella | Moth |
| Caloptilia stigmatella | Moth |
| Caloptilia strictella | Moth |
| Caloptilia suberinella | Moth |
| Caloreas leucobasis | Moth |
| Caloreas occidentella | Moth |
| Calosoma calidum | Fiery Hunter |
| Calosoma cancellatum | Caterpillar Hunter Beetle |
| Calosoma frigidum | Caterpillar Hunter Beetle |
| Calosoma luxatum | Caterpillar Hunter Beetle |
| Calosoma moniliatum | Caterpillar Hunter Beetle |
| Calosoma wilkesii | Ground Beetle |
| Calycopsis bigelowi | Jellyfish |
| Calycopsis nematophora | Jellyfish |
| Calymmaria emertoni | Hahniid Spider |
| Calymmaria monicae | Hahniid Spider |
| Calymmaria nana | Hahniid Spider |
| Calymmaria suprema | Hahniid Spider |
| Calyptomerus oblongulus | Minute Beetle |
| Calyptraea fastigiata | Cup-And-Saucer Snail |
| Cameraria agrifoliella | Moth |
| Cameraria gaultheriella | Moth |
| Cameraria guttifinitella | Moth |
| Cameraria hamadryadella | Solitary Oak Leafminer |
| Cameraria lobatiella | Moth |
| Cameraria pentekes | Moth |
| Camponotus laevigatus | Carpenter Ant |
| Camponotus nearcticus | Carpenter Ant |
| Camponotus vicinus | Carpenter Ant |
| Campylomma verbasci | True Bug |
| Campyloneura virgula | True Bug |
| Canalidion montanum | Spider |
| Candocyprinotus ovatus | Seed Shrimp |
| Candona albicans | Seed Shrimp |
| Candona caudata | Seed Shrimp |
| Candona compressa | Seed Shrimp |
| Candona distincta | Seed Shrimp |
| Candona paraohioensis | Seed Shrimp |
| Candona renoensis | Seed Shrimp |
| Candona stagnalis | Seed Shrimp |
| Candona subacuminata | Seed Shrimp |
| Canifa pallipes | False Flower Beetle |
| Cantharis alticola | Soldier Beetle |
| Cantharis aneba borealis | Soldier Beetle |
| Cantharis beta | Soldier Beetle |
| Cantharis consors | Soldier Beetle |
| Cantharis curtisi | Soldier Beetle |
| Cantharis transmarina scopa | Soldier Beetle |
| Cantharis transmarina transmarina | Soldier Beetle |
| Canthon praticola | Tumblebug |
| Canthon simplex | Tumblebug |
| Capheira mollis | Sea Cucumber |
| Capheira sulcata | Sea Cucumber |
| Capillaria exilis | Parasite |
| Capillaria freemani | Parasite |
| Capillaria lycodi | Parasite |
| Capillaria obsignata | Parasite |
| Capillaria parophrysi | Parasite |
| Capitella capitata | Polychaete Worm |
| Capitophorus carduinus | True Bug |
| Capitophorus hippophaes | True Bug |
| Capitophorus horni | True Bug |
| Capnia cheama | Stonefly |
| Capnia coloradensis | Stonefly |
| Capnia confusa | Stonefly |
| Capnia elongata | Stonefly |
| Capnia excavata | Stonefly |
| Capnia gracilaria | Stonefly |
| Capnia melia | Stonefly |
| Capnia nana | Stonefly |
| Capnia nearctica | Stonefly |
| Capnia petila | Stonefly |
| Capnia pileata | Stonefly |
| Capnia sextuberculata | Stonefly |
| Capnia vernalis | Stonefly |
| Capperia evansi | Evans's Plume Moth |
| Capperia ningoris | Hedgenettle Plume Moth |
| Caprella angusta | Amphipod |
| Caprella borealis | Amphipod |
| Caprella californica | Amphipod |
| Caprella ciliata | Amphipod |
| Caprella drepanocheir | Amphipod |
| Caprella equilibra | Amphipod |
| Caprella gracilior | Amphipod |
| Caprella incisa | Amphipod |
| Caprella irregularis | Amphipod |
| Caprella laeviscula | Amphipod |
| Caprella mendax | Amphipod |
| Caprella natalensis | Amphipod |
| Caprella pilidigitata | Amphipod |
| Caprella pustualta | Amphipod |
| Caprella radiuscula | Amphipod |
| Caprella striata | Amphipod |
| Caprella ungulina | Amphipod |
| Caprella verrucosa | Amphipod |
| Capsus ater | True Bug |
| Capsus cinctus | True Bug |
| Carabus chamissonis | Caterpillar Hunter Beetle |
| Carabus maeander maeander | Caterpillar Hunter Beetle |
| Carabus nemoralis nemoralis | Beetle |
| Carabus serratus | Caterpillar Hunter Beetle |
| Carabus taedatus agassii | Caterpillar Hunter Beetle |
| Carabus taedatus bicanaliceps | Beetle |
| Carabus taedatus rainieri | Beetle |
| Caradrina camina | Moth |
| Carcharodon carcharias | White Shark |
| Carcinocephalus exsculpta | Rove Beetle |
| Carcinonemertes epialti | Ribbon Worm |
| Carcinonemertes errans | Ribbon Worm |
| Carcinops pumilio | Clown Beetle |
| Cardiastethus borealis | True Bug |
| Cardiophorus alpestris | Click Beetle |
| Cardiophorus amplicollis | Click Beetle |
| Cardiophorus brunnipennis | Click Beetle |
| Cardiophorus communius | Click Beetle |
| Cardiophorus kooskooskiensis | Click Beetle |
| Cardiophorus latiusculus | Click Beetle |
| Cardiophorus nevadensis | Click Beetle |
| Cardiophorus plebejus | Click Beetle |
| Cardiophorus plexus | Click Beetle |
| Cardiophorus propinquus | Click Beetle |
| Cardiophorus pubescens | Brown Wireworm |
| Cardiophorus tenebrosus | Click Beetle |
| Cardiophorus tumidicollis | Click Beetle |
| Cardiophorus tutus | Click Beetle |
| Careproctus colletti | Alaska Snailfish |
| Careproctus cypselurus | Falcate Snailfish |
| Careproctus furcellus | Snailfish |
| Careproctus gilberti | Smalldisk Snailfish |
| Careproctus oregonensis | Smallfin Snailfish |
| Careproctus ovigerum | Abyssal Snailfish |
| Carineogammarus makarovi | Amphipod |
| Carmenta giliae | Moth |
| Carolinaia schlingeri | True Bug |
| Carpatolechia belangerella | Moth |
| Carpatolechia fugitivella | Moth |
| Carpatolechia notatella | Moth |
| Carpelimus bilineatus | Spiny-legged Rove Beetle |
| Carpelimus congener | Rove Beetle |
| Carpelimus conjunctus | Rove Beetle |
| Carpelimus diffusus | Rove Beetle |
| Carpelimus harneyi | Rove Beetle |
| Carpelimus nanuloides | Rove Beetle |
| Carpelimus vancouverensis | Spiny-legged Rove Beetle |
| Carpelimus volans | Rove Beetle |
| Carphacis nepigonensis | Crab-like Rove Beetle |
| Carphoborus intermedius | Bark And Ambrosia Beetle |
| Carphoborus ponderosae | Bark And Ambrosia Beetle |
| Carphoborus vandykei | Bark And Ambrosia Beetle |
| Carpophilus dimidiatus | Corn Sap Beetle |
| Carpophilus discoideus | Sap-feeding Beetle |
| Carpophilus hemipterus | Driedfruit Beetle |
| Carpophilus lugubris | Dusky Sap Beetle |
| Carpophilus mutilatus | Sap-Feeding Beetle |
| Carrhydrus crassipes | Predaceous Diving Beetle |
| Carsia sororiata | Moth |
| Carsonus aridus | True Bug |
| Carterocephalus palaemon magnus | Arctic Skipper |
| Carterocephalus palaemon skada | Arctic Skipper |
| Cartodere constricta | Plaster Beetle |
| Cartodere nodifer | Minute Brown Scavenger Beetle |
| Carulaspis juniperi | True Bug |
| Caryocolum cassella | Moth |
| Caryocolum marmorea | Moth |
| Caryocolum nearcticum | Moth |
| Caryocolum proxima | Moth |
| Caryocolum pullatella | Moth |
| Caryophyllia arnoldi | Stony Coral |
| Cascadoperla trictura | Stonefly |
| Cassida flaveola | Leaf Beetle |
| Castianeira alteranda | Sun Spider |
| Catabena lineolata | Cutworm Moth |
| Catablema nodulosa | Jellyfish |
| Catastega timidella | Oak Trumpet Skeletonizer |
| Catastia actualis | Moth |
| Catocala allusa | Moth |
| Catocala briseis | Briseis Underwing Moth |
| Catocala californica | Moth |
| Catocala clintonii | Clinton's Underwing Moth |
| Catocala grotiana | Moth |
| Catocala hermia | Moth |
| Catocala junctura | Joined Underwing Moth |
| Catocala meskei | Meske's Underwing Moth |
| Catocala ultronia | Ultronia Underwing Moth |
| Catopocerus cryptophagoides | Round Fungus Beetle |
| Catops alpinus | Small Scavenger Beetle |
| Catops alpinus sitkanus | Round Fungus Beetle |
| Catops alsiosus | Small Carrion Beetle |
| Catops americanus | Small Carrion Beetle |
| Catops basilaris | Small Carrion Beetle |
| Catops egenus | Round Fungus Beetle |
| Catops gratiosus | Round Fungus Beetle |
| Catops luridipennis | Round Fungus Beetle |
| Catops luridipennis luridipennis | Beetle |
| Catops mathersi | Round Fungus Beetle |
| Catops paramericanus | Small Carrion Beetle |
| Catops simplex | Small Carrion Beetle |
| Catoptria latiradiellus | Three-spotted Crambus Moth |
| Catoptria maculalis | Moth |
| Catoptria oregonica | Moth |
| Catoptria trichostomus | Moth |
| Catoptrichus frankenhaeuseri | Round Fungus Beetle |
| Catostomus columbianus | Bridgelip Sucker |
| Catostomus commersonii | White Sucker |
| Catostomus platyrhynchus | Mountain Sucker |
| Catriona columbiana | British Columbia Aeolid |
| Cauchas cockerelli | Moth |
| Cauchas simpliciella | Moth |
| Caudatella heterocaudata | Mayfly |
| Caudatella jacobi | Mayfly |
| Caulibugula ciliata | Bryozoa |
| Caulibugula occidentalis | Bryozoa |
| Caulleriella hamata | Polychaete Worm |
| Caulolatilus princeps | Ocean Whitefish |
| Cauloramphus echinus | Bryozoa |
| Cauloramphus spiniferum | Bryozoa |
| Cavariella aegopodii | True Bug |
| Cavariella archangelicae | True Bug |
| Cavariella borealis | True Bug |
| Cavariella digitata | True Bug |
| Cavariella konoi | True Bug |
| Cavariella pastinacae | True Bug |
| Cavariella theobaldi | True Bug |
| Cedoaphis incognita | True Bug |
| Cellaria mandibulata | Bryozoa |
| Celleporella hyalina | Glassy-White Encrusting Bryozoan |
| Celypha cespitana | Thyme Marble |
| Cenocorixa andersoni | Anderson's Water Boatman |
| Cenocorixa bifida hungerfordi | True Bug |
| Cenocorixa blaisdelli | True Bug |
| Cenocorixa dakotensis | True Bug |
| Cenocorixa expleta | True Bug |
| Cenocorixa utahensis | True Bug |
| Cenopis reticulatana | Reticulated Fruitworm Moth |
| Centrocercus urophasianus | Greater Sage-Grouse |
| Centromerita bicolor | Sheetweb Spider |
| Centromerus longibulbus | Sheetweb Spider |
| Centromerus sylvaticus | Spider |
| Centroptilum album | Mayfly |
| Centroptilum bifurcatum | Mayfly |
| Centroptilum conturbatum | Mayfly |
| Centuriatus auromicans | Variegated Mud-Loving Beetle |
| Cenygma integrum | Mayfly |
| Cepegillettea betulaefoliae | True Bug |
| Cephaloon pacificum | False Long-horned Beetle |
| Cephaloon pacificum Van | False Longhorn Beetle |
| Cephalophoxoides homilis | Amphipod |
| Cephalothrix pacifica | Ribbon Worm |
| Ceraclea alagma | Caddisfly |
| Ceraclea arielles | Caddisfly |
| Ceraclea cancellata | Caddisfly |
| Ceraclea copha | Caddisfly |
| Ceraclea latahensis | Caddisfly |
| Ceraclea maculata | Caddisfly |
| Ceraclea nigronervosa | Caddisfly |
| Ceraclea resurgens | Caddisfly |
| Ceraclea transversa | Caddisfly |
| Ceraclea vertreesi | Caddisfly |
| Ceraleptus denticulatus | True Bug |
| Ceramaster clarki | Cookie Star |
| Ceramaster japonicus | Japanese Cookie Star |
| Cerastis salicarum | Cutworm Moth |
| Ceratagallia arida | True Bug |
| Ceratagallia californica | True Bug |
| Ceratagallia nanella | True Bug |
| Ceratagallia okanagana | True Bug |
| Ceratagallia omani | True Bug |
| Ceratagallia robusta poudris | True Bug |
| Ceratagallia sanguinolenta | True Bug |
| Ceratagallia siccifolia | True Bug |
| Ceratagallia viator | True Bug |
| Ceraticelus atriceps | Sheetweb Spider |
| Ceraticelus crassiceps | Sheetweb Spider |
| Ceraticelus fissiceps | Sheetweb Spider |
| Ceraticelus laetabilis | Sheetweb Spider |
| Ceraticelus minutus | Sheetweb Spider |
| Ceraticelus rowensis | Sheetweb Spider |
| Ceraticelus silus | Sheetweb Spider |
| Ceratinella acerea | Sheetweb Spider |
| Ceratinella alaskae | Sheetweb Spider |
| Ceratinella brunnea | Sheetweb Spider |
| Ceratinella ornatula | Spider |
| Ceratinella parvula | Sheetweb Spider |
| Ceratinella tigana | Sheetweb Spider |
| Ceratinops inflatus | Sheetweb Spider |
| Ceratocapsus apicatus | True Bug |
| Ceratocapsus cunealis | True Bug |
| Ceratocapsus denticulatus | True Bug |
| Ceratocapsus downesi | True Bug |
| Ceratocapsus drakei | True Bug |
| Ceratocapsus nigrocephalus | True Bug |
| Ceratocombus vagans | True Bug |
| Ceratomegilla ulkei | Giant Lady Beetle |
| Ceratomyxa shasta | Parasite |
| Ceratophysa ceratopyga valvaecristata | Deep Sea Urchin |
| Ceratoscopelus townsendi | Dogtooth Lampfish |
| Cerberilla mosslandica | Moss Landing Burrowing Aeolid |
| Cercopedius artemisiae | Pine Needle Weevil |
| Cercyon adumbratus | Giant Water Scavenger Beetle |
| Cercyon analis | Giant Water Scavenger Beetle |
| Cercyon cinctus | Giant Water Scavenger Beetle |
| Cercyon erraticus | Water Scavenger Beetle |
| Cercyon haemorrhoidalis | Giant Water Scavenger Beetle |
| Cercyon herceus frigidus | Water Scavenger Beetle |
| Cercyon herceus herceus | Water Scavenger Beetle |
| Cercyon impressus | Giant Water Scavenger Beetle |
| Cercyon lateralis | Giant Water Scavenger Beetle |
| Cercyon limbatus | Giant Water Scavenger Beetle |
| Cercyon luniger | Giant Water Scavenger Beetle |
| Cercyon marinus | Giant Water Scavenger Beetle |
| Cercyon minusculus | Giant Water Scavenger Beetle |
| Cercyon nevadanus | Giant Water Scavenger Beetle |
| Cercyon pygmaeus | Giant Water Scavenger Beetle |
| Cercyon quisquilius | Giant Water Scavenger Beetle |
| Cercyon roseni | Giant Water Scavenger Beetle |
| Cercyon tolfino | Water Scavenger Beetle |
| Cercyon unipunctatus | Giant Water Scavenger Beetle |
| Cercyonis oetus phocus | Small Woodnymph |
| Cercyonis pegala ino | Common Woodnymph |
| Cerebratulus albifrons | Ribbon Worm |
| Cerebratulus herculeus | Ribbon Worm |
| Cerebratulus occidentalis | Ribbon Worm |
| Ceresa albidosparsa | True Bug |
| Ceresa alta | True Bug |
| Ceresa basalis | True Bug |
| Ceresa diceros | True Bug |
| Ceresa festina | True Bug |
| Ceresa wickhami | True Bug |
| Ceriodaphnia acanthina | Water Flea |
| Ceriodaphnia megops | Water Flea |
| Ceriodaphnia pulchella | Water Flea |
| Cerithiopsis tubercularis | Marine Snail |
| Cerobasis questfalica | Barkfly |
| Ceruchus punctatus | Stag Beetle |
| Ceruraphis eriophori | True Bug |
| Ceruraphis viburnicola | True Bug |
| Cerylon castaneum | Minute Bark Beetle |
| Cerylon unicolor | Minute Bark Beetle |
| Cetomya malespinae | Clam |
| Cetorhinus maximus | Basking Shark |
| Ceuthophilus alpinus | Cave Cricket |
| Ceutorhynchus americanus | Minute Seed Weevil |
| Ceutorhynchus assimilis | Cabbage Seedpod Weevil |
| Ceutorhynchus bolteri | Minute Seed Weevil |
| Ceutorhynchus cupreus | Snout Beetle |
| Ceutorhynchus erysimi | Minute Seed Weevil |
| Ceutorhynchus fulvotertius | Snout Beetle |
| Ceutorhynchus lecontei | Minute Seed Weevil |
| Ceutorhynchus neglectus | Minute Seed Weevil |
| Ceutorhynchus obstrictus | Cabbage Seedpod Weevil |
| Ceutorhynchus opertus | Snout Beetle |
| Ceutorhynchus oregonensis | Minute Seed Weevil |
| Ceutorhynchus ovipennis | Snout Beetle |
| Ceutorhynchus punctiger | Snout Beetle |
| Ceutorhynchus querceti | Minute Seed Weevil |
| Ceutorhynchus rapae | Cabbage Curculio |
| Ceutorhynchus squamosulus | Snout Beetle |
| Chaceia ovoidea | Wartneck Piddock |
| Chaenophryne melanorhabdus | Smooth Dreamer |
| Chaetarthria nigrella | Giant Water Scavenger Beetle |
| Chaetocnema cribrata | Leaf Beetle |
| Chaetocnema difficilis | Leaf Beetle |
| Chaetocnema irregularis | Skeletonizing Leaf Beetles and Flea Beetle |
| Chaetocnema protensa | Skeletonizing Leaf Beetles and Flea Beetle |
| Chaetocnema pulicaria | Corn Flea Beetle |
| Chaetocnema subconvexa | Leaf Beetle |
| Chaetocnema subcylindrica | Leaf Beetle |
| Chaetophloeus heterodoxus | Cedar Bark Beetle |
| Chaetopleura gemma | Gem Chiton |
| Chaetopterus variopedatus | U-Shaped Parchment Tube Worm |
| Chaetosiphon fragaefolii | True Bug |
| Chaetosiphon hottesi | True Bug |
| Chaetosiphon potentillae | True Bug |
| Chaetosiphon tetrarhodus | True Bug |
| Chaetosiphon thomasi | True Bug |
| Chaetozone acuta | Polychaete Worm |
| Chaetozone setosa | Polychaete Worm |
| Chaitophorus macrostachyae | True Bug |
| Chaitophorus monelli | True Bug |
| Chaitophorus neglectus | True Bug |
| Chaitophorus nigrae | True Bug |
| Chaitophorus nigricentrus | True Bug |
| Chaitophorus pallipes | True Bug |
| Chaitophorus populicola | True Bug |
| Chaitophorus populifolii | True Bug |
| Chaitophorus pusillus | True Bug |
| Chaitophorus pustulatus | True Bug |
| Chaitophorus salicicola | True Bug |
| Chaitophorus saliciniger | True Bug |
| Chaitophorus stevensis | True Bug |
| Chaitophorus viminalis | True Bug |
| Chalcoscirtus alpicola | Spider |
| Chalcoscirtus carbonarius | Jumping Spider |
| Chapperiopsis patula | Bryozoa |
| Chapperiopsis varians | Bryozoa |
| Charadrius hiaticula | Common Ringed Plover |
| Charadrius mongolus | Lesser Sand-Plover |
| Charadrius semipalmatus | Semipalmated Plover |
| Charidotella sexpunctata bicolor | Beetle |
| Chariessa elegans | Checkered Beetle |
| Chariessa pilosa | Checkered Beetle |
| Chauliodes pectinicornis | Summer Fishfly |
| Cheilonereis cyclurus | Red And White Banded Sea-Nymph |
| Cheilopora praelonga | Bryozoa |
| Cheilopora praelucida | Bryozoa |
| Cheiracanthium inclusum | Agrarian Sac Spider |
| Cheiracanthium mildei | Spider |
| Cheirimedia macrocarpa america | Amphipod |
| Cheirimedia similicarpa | Amphipod |
| Cheirimedia zotea | Amphipod |
| Chelis beanii | Moth |
| Chelis sordida | Moth |
| Chelonaplysilla polyraphis | Purple Slippery Sponge |
| Chelonychus longipes | Minute Seed Weevil |
| Chelophyes appendiculata | Jellyfish |
| Chersotis juncta | Cutworm Moth |
| Chesnonia verrucosa | Warty Poacher |
| Cheumatopsyche analis | Caddisfly |
| Cheumatopsyche campyla | Caddisfly |
| Cheumatopsyche gracilis | Caddisfly |
| Cheumatopsyche oxa | Caddisfly |
| Cheumatopsyche pettiti | Caddisfly |
| Cheumatopsyche smithi | Caddisfly |
| Chevalia aviculae | Amphipod |
| Chilacis typhae | True Bug |
| Chilara taylori | Spotted Cusk-eel |
| Chilocorus tricyclus | Lady Beetle |
| Chilothorax distinctus | Hide Beetle |
| Chimarra obscura | Caddisfly |
| Chionaspis lintneri | True Bug |
| Chionaspis ortholobis | True Bug |
| Chionaspis pinifoliae | True Bug |
| Chionodes abella | Moth |
| Chionodes abitus | Moth |
| Chionodes acerella | Moth |
| Chionodes agriodes | Moth |
| Chionodes boreas | Moth |
| Chionodes braunella | Moth |
| Chionodes ceanothiella | Moth |
| Chionodes chlorocephala | Moth |
| Chionodes continuella | Moth |
| Chionodes dolo | Moth |
| Chionodes fictor | Moth |
| Chionodes grandis | Moth |
| Chionodes histon | Moth |
| Chionodes lictor | Moth |
| Chionodes lugubrella | Moth |
| Chionodes metoecus | Moth |
| Chionodes nigrobarbata | Moth |
| Chionodes obscurusella | Boxelder Leafworm Moth |
| Chionodes occidentella | Moth |
| Chionodes occlusa | Moth |
| Chionodes periculella | Moth |
| Chionodes permacta | Moth |
| Chionodes petalumensis | Moth |
| Chionodes pinax | Moth |
| Chionodes praecia | Moth |
| Chionodes praeclarella | Moth |
| Chionodes praetor | Moth |
| Chionodes pseudofondella | Moth |
| Chionodes psiloptera | Moth |
| Chionodes restio | Moth |
| Chionodes retiniella | Moth |
| Chionodes sabinianae | Moth |
| Chionodes salicella | Moth |
| Chionodes sattleri | Moth |
| Chionodes terminimaculella | Moth |
| Chionodes viduella | Moth |
| Chiridota laevis | Sea Cucumber |
| Chiridota nanaimensis | Sea Cucumber |
| Chirimia biceps biceps | Polychaete Worm |
| Chirimia biceps lacera | Polychaete Worm |
| Chirimia similis | Polychaete Worm |
| Chirolophis tarsodes | Matcheek Warbonnet |
| Chiroteuthis murrayi | Blind Cirrate Squid |
| Chlaenius harpalinus | Vivid Metallic Ground Beetle |
| Chlaenius interruptus | Vivid Metallic Ground Beetle |
| Chlaenius lithophilus | Vivid Metallic Ground Beetle |
| Chlaenius niger | Vivid Metallic Ground Beetle |
| Chlaenius purpuricollis | Vivid Metallic Ground Beetle |
| Chlaenius sericeus | Vivid Metallic Ground Beetle |
| Chlaenius tricolor | Vivid Metallic Ground Beetle |
| Chlaenius tricolor vigilans | Vivid Metallic Ground Beetle |
| Chlamydatus associatus | True Bug |
| Chlamydatus brevicornis | True Bug |
| Chlamydatus obliquus | True Bug |
| Chlamydatus pallidicornis | True Bug |
| Chlamydatus pulicarius | True Bug |
| Chlamydatus pullus | True Bug |
| Chlamydatus schuhi | True Bug |
| Chloealtis abdominalis | Grasshopper |
| Chloealtis conspersa | Grasshopper |
| Chlorita nearctica | True Bug |
| Chlorochlamys triangularis | Moth |
| Chlorochroa granulosa | True Bug |
| Chlorochroa rossiana | True Bug |
| Chlorochroa uhleri | True Bug |
| Chloropulvinaria floccifera | True Bug |
| Chlorosea nevadaria | Moth |
| Chlorotettix lusorius | True Bug |
| Chlorotettix similis | True Bug |
| Chlorotettix unicolor | True Bug |
| Chlosyne hoffmanni manchada | Manchada Checkerspot |
| Chondracanthus pinguis | Parasite |
| Chondrochelia dubia | Isopod |
| Chone duneri | Polychaete Worm |
| Chone ecaudata | Polychaete Worm |
| Chone infundibuliformis | Polychaete Worm |
| Chone magna | Polychaete Worm |
| Chone minuta | Minute Feather-Duster |
| Chone mollis | Polychaete Worm |
| Choreutis betuliperda | Moth |
| Choristoneura albaniana | Moth |
| Choristoneura conflictana | Large Aspen Tortrix Moth |
| Choristoneura fractivittana | Broken-banded Leafroller |
| Choristoneura fumiferana | Spruce Budworm Moth |
| Choristoneura lambertiana | Sugar Pine Tortrix Moth |
| Choristoneura occidentalis | Western Spruce Budworm |
| Choristoneura orae | Spruce Budworm |
| Choristoneura pinus | Jack Pine Budworm |
| Choristoneura zapulata | Zapulata Moth |
| Choristostigma disputalis | Moth |
| Chromaphis juglandicola | True Bug |
| Chromopleustes lineatus | Amphipod |
| Chrosomus eos | Northern Redbelly Dace |
| Chrosomus neogaeus | Finescale Dace |
| Chrysobothris monticola | Metallic Wood-boring Beetle |
| Chrysobothris rotundicollis | Metallic Wood-boring Beetle |
| Chrysoclista cambiella | Moth |
| Chrysoclista linneella | Linden Bark-Borer |
| Chrysoclista villella | Moth |
| Chrysodeixis chalcites | Moth |
| Chrysoesthia drurella | Goosefoot Leafminer |
| Chrysoesthia lingulacella | Moth |
| Chrysolina basilaris | Scriptured Leaf Beetle |
| Chrysolina flavomarginata | Scriptured Leaf Beetle |
| Chrysolina flavomarginata vidua | Leaf Beetle |
| Chrysolina hyperici hyperici | Beetle |
| Chrysolina varians | Leaf Beetle |
| Chrysomela blaisdelli | Leaf Beetle |
| Chrysomela blaisdelli blaisdelli | Beetle |
| Chrysomela confluens | Scriptured Leaf Beetle |
| Chrysomela crotchi | Aspen Leaf Beetle |
| Chrysomela falsa | Scriptured Leaf Beetle |
| Chrysomela lineatopunctata | Scriptured Leaf Beetle |
| Chrysomela mainensis interna | Scriptured Leaf Beetle |
| Chrysomela mainensis littorea | Leaf Beetle |
| Chrysomela schaefferi | Scriptured Leaf Beetle |
| Chrysomela semota | Scriptured Leaf Beetle |
| Chrysopa chi | Green Lacewing |
| Chrysopa coloradensis | Green Lacewing |
| Chrysopa excepta | Green Lacewing |
| Chrysopa nigricornis | Green Lacewing |
| Chrysopa pleuralis | Green Lacewing |
| Chrysopa quadripunctata | Green Lacewing |
| Chrysopathes speciosa | Black Coral |
| Chrysoperla carnea | Common Green Lacewing |
| Chrysops aestuans | Deer Fly |
| Chrysops asbestos | Deer Fly |
| Chrysops ater | Deer Fly |
| Chrysops coloradensis | Deer Fly |
| Chrysops dawsoni | Deer Fly |
| Chrysops excitans | Deer Fly |
| Chrysops frigidus | Deer Fly |
| Chrysops fulvaster | Deer Fly |
| Chrysops furcatus | Deer Fly |
| Chrysops mitis | Deer Fly |
| Chrysops nigripes | Deer Fly |
| Chrysops noctifer | Deer Fly |
| Chrysops proclivis | Deer Fly |
| Chrysops surdus | Deer Fly |
| Chrysso nordica | Cobweb Weaver |
| Chyranda centralis | Caddisfly |
| Chytonix palliatricula | Cutworm Moth |
| Cicadella viridis | True Bug |
| Cicadula ciliata | True Bug |
| Cicadula intermedia | True Bug |
| Cicadula longiseta | True Bug |
| Cicadula melanogaster | True Bug |
| Cicadula ornata | True Bug |
| Cicadula smithi | True Bug |
| Cicadula subcupraea | True Bug |
| Cicadula vittipennis | True Bug |
| Cicindela decemnotata | Badlands Tiger Beetle |
| Cicindela decemnotata meriwetheri | Temperate Tiger Beetle |
| Cicindela lengi versuta | Temperate Tiger Beetle |
| Cicindela limbalis | Common Claybank Tiger Beetle |
| Cicindela longilabris perviridis | Temperate Tiger Beetle |
| Cicindela nebraskana | Prairie Long-lipped Tiger Beetle |
| Cicindela purpurea hatchi | Temperate Tiger Beetle |
| Cicindela tranquebarica borealis | Oblique-lined Tiger Beetle |
| Cicurina idahoana | Meshweaver |
| Cicurina intermedia | Meshweaver |
| Cicurina robusta | Meshweaver |
| Cicurina simplex | Meshweaver |
| Cicurina tersa | Meshweaver |
| Cilea silphoides | Crab-like Rove Beetle |
| Cimberis bihirsuta | Snout and Bark Beetle |
| Cimberis compta | Snout and Bark Beetle |
| Cimberis elongata | Snout and Bark Beetle |
| Cimbex pacifica | Pacific Sawfly |
| Cimbocera pauper | Pine Needle Weevil |
| Cimex latipennis | True Bug |
| Cimex pilosellus | True Bug |
| Cinacanthus hirsutus | Scarab Beetle |
| Cinara arizonica | True Bug |
| Cinara braggii | True Bug |
| Cinara brevispinosa | True Bug |
| Cinara canatra | True Bug |
| Cinara caudelli | True Bug |
| Cinara coloradensis | True Bug |
| Cinara confinis | True Bug |
| Cinara contortae | True Bug |
| Cinara cupressi | True Bug |
| Cinara curvipes | True Bug |
| Cinara ferrisi | True Bug |
| Cinara fornacula | True Bug |
| Cinara hottesi | True Bug |
| Cinara inscripta | True Bug |
| Cinara juniperi | True Bug |
| Cinara kuchea | True Bug |
| Cinara laricifoliae | True Bug |
| Cinara medispinosa | True Bug |
| Cinara murrayanae | True Bug |
| Cinara nigra | True Bug |
| Cinara nigripes | True Bug |
| Cinara nimbata | True Bug |
| Cinara obscura | True Bug |
| Cinara occidentalis | True Bug |
| Cinara oregoni | True Bug |
| Cinara parvicornis | True Bug |
| Cinara pergandei | True Bug |
| Cinara pilicornis | True Bug |
| Cinara pinea | True Bug |
| Cinara ponderosae | True Bug |
| Cinara pseudotaxifoliae | True Bug |
| Cinara pseudotsugae | True Bug |
| Cinara saskensis | True Bug |
| Cinara sonata | True Bug |
| Cinara splendens | True Bug |
| Cinara thatcheri | True Bug |
| Cinara tsugae | True Bug |
| Cinara vandykei | True Bug |
| Cinara villosa | True Bug |
| Cinygmula kootenai | Mayfly |
| Cinygmula mimus | Mayfly |
| Cinygmula par | Mayfly |
| Cinygmula ramaleyi | Mayfly |
| Cinygmula uniformis | Mayfly |
| Ciocalypta penicillus | Sponge |
| Circeis amoricana | Polychaete Worm |
| Circeis spirillum | Polychaete Worm |
| Circotettix carolianus | Grasshopper |
| Circotettix rabula | Wrangler Grasshopper |
| Circotettix undulatus | Undulate-winged Grasshopper |
| Circotettix undulatus undulatus | Undulate-winged Grasshopper |
| Cirolana harfordi | Scavenging Isopod |
| Cirratulus cirratus | Polychaete Worm |
| Cirratulus spectabilis | Spectacular Filament-Worm |
| Cirrophorus branchiatus | Polychaete Worm |
| Cirrophorus lyra | Polychaete Worm |
| Cis americanus | Minute Tree-fungus Beetle |
| Cis angustus | Minute Tree-Fungus Beetle |
| Cis biarmatus | Minute Tree-Fungus Beetle |
| Cis ephippiatus | Minute Tree-Fungus Beetle |
| Cis fuscipes | Minute Tree-fungus Beetle |
| Cis horridulus | Minute Tree-Fungus Beetle |
| Cis hystriculus | Minute Tree-Fungus Beetle |
| Cis levettei | Minute Tree-fungus Beetle |
| Cis maritimus | Minute Tree-Fungus Beetle |
| Cis striolatus | Minute Tree-Fungus Beetle |
| Cis tridentatus | Minute Tree-Fungus Beetle |
| Cixius coelopium | True Bug |
| Cixius meridionalis | True Bug |
| Cixius misellus | True Bug |
| Cixius narke | True Bug |
| Cixius nervosus | True Bug |
| Cixius praecox | True Bug |
| Cixius umbrosus | True Bug |
| Claassenia sabulosa | Stonefly |
| Cladara atroliturata | Scribbler Moth |
| Cladonema californicum | Jellyfish |
| Cladorhiza caillieti | Sponge |
| Clambus gibbulus | Minute Beetle |
| Clambus pubescens | Minute Beetle |
| Clamoris americana | Long-jointed Beetle |
| Clastoptera atrapicata | True Bug |
| Clastoptera brunnea | True Bug |
| Clastoptera doeringae | True Bug |
| Clastoptera juniperina | True Bug |
| Clastoptera ovata | True Bug |
| Clastoptera proteus | True Bug |
| Clavella parva | Parasite |
| Clavilispinus rufescens | Unmargined Rove Beetle |
| Clavinema mariae | Parasite |
| Clavopora occidentalis | Bryozoa |
| Cleonardo moirae | Amphipod |
| Cleonidius erysimi | Snout Beetle |
| Cleonidius longinasus | Snout Beetle |
| Cleonidius poricollis | Snout Beetle |
| Cleonidius trivittatus | Snout Beetle |
| Clepsis clemensiana | Clemens' Clepsis |
| Clepsis consimilana | Moth |
| Clepsis fucana | Moth |
| Clepsis melaleucana | Moth |
| Clepsis moeschleriana | Moth |
| Clepsis penetralis | Moth |
| Clepsis peritana | Garden Tortrix |
| Clepsis spectrana | Moth |
| Clepsis virescana | Moth |
| Cleptelmis ornata | Riffle Beetle |
| Clevelandia ios | Arrow Goby |
| Clinocardium blandum | Fucan Cockle |
| Clinocardium californiense | Aleutian Cockle |
| Clinocardium ciliatum | Cockle |
| Clinocottus globiceps | Mosshead Sculpin |
| Clinostomum marginatum | Parasite |
| Cliona argus laevicollis | Sponge |
| Cliona lobata | Sponge |
| Cliopsis krohni | Sea Cherub |
| Clistoronia flavicollis | Caddisfly |
| Clistosaccus paguri | Hermit Crab Parasitic Barnacle |
| Clivina fossor | Round Sand Beetle |
| Clivina fossor fossor | Beetle |
| Clivinema fuscum | True Bug |
| Clivinema mediale | True Bug |
| Clostera brucei | Prominent |
| Clostera strigosa | Prominent |
| Closterotomus fulvomaculatus | True Bug |
| Closterotomus norvegicus | True Bug |
| Clubiona bryantae | Leafcurling Sac Spider |
| Clubiona canadensis | Leafcurling Sac Spider |
| Clubiona furcata | Leafcurling Sac Spider |
| Clubiona kastoni | Kaston Sac Spider |
| Clubiona kulczynskii | Leafcurling Sac Spider |
| Clubiona lutescens | Leafcurling Sac Spider |
| Clubiona mimula | Leafcurling Sac Spider |
| Clubiona moesta | Leafcurling Sac Spider |
| Clubiona mutata | Leafcurling Sac Spider |
| Clubiona norvegica | Leafcurling Sac Spider |
| Clubiona opeongo | Leafcurling Sac Spider |
| Clubiona pacifica | Leafcurling Sac Spider |
| Clubiona pallidula | Leafcurling Sac Spider |
| Clubiona praematura | Leafcurling Sac Spider |
| Clubiona riparia | Leafcurling Sac Spider |
| Clubiona trivialis | Leafcurling Sac Spider |
| Clusiota impressicollis | Rove Beetle |
| Clydesmithia canadensis | True Bug |
| Clymenella torquata | Polychaete Worm |
| Clymenura columbiana | Polychaete Worm |
| Clypastraea biguttata | Minute Hooded Beetle |
| Clypastraea lugubris | Minute Hooded Beetle |
| Clypastraea montana | Minute Hooded Beetle |
| Clypastraea obesa | Minute Hooded Beetle |
| Clytus canadensis | Elderberry Longhorn Beetle |
| Clytus ruricola | Elderberry Longhorn Beetle |
| Cnemogonus lecontei | Minute Seed Weevil |
| Cnephalocotes obscurus | Spider |
| Cnephasia longana | Omnivorous Leaftier |
| Cnephasia stephensiana | Gray Tortrix |
| Coccidophilus marginatus | Spurleg Lady Beetle |
| Coccinella alta | High-country Lady Beetle |
| Coccinella fulgida | Lady Beetle |
| Coccinella hieroglyphica humboldtiensis | Giant Lady Beetle |
| Coccinella hieroglyphica kirbyi | Giant Lady Beetle |
| Coccinella prolongata prolongata | Lady Beetle |
| Coccinella transversoguttata richardsoni | Beetle |
| Coccinella trifasciata subversa | Giant Lady Beetle |
| Coccinella undecimpunctata undecimpuncta | Lady Beetle |
| Coccinella undecimpunctata undecimpunctata | Beetle |
| Cocculina cowani | Limpet |
| Coccus hesperidum | True Bug |
| Cochylis atricapitana | Moth |
| Cochylis dubitana | Moth |
| Cochylis hoffmanana | Moth |
| Codonellina anatina | Bryozoa |
| Codonellina cribriformis | Bryozoa |
| Coelambus compar | Predaceous Diving Beetle |
| Coelambus dissimilis | Predaceous Diving Beetle |
| Coelambus impressopunctatus | Predaceous Diving Beetle |
| Coelambus infuscatus | predaceous diving beetle |
| Coelambus lutescens | predaceous diving beetle |
| Coelambus masculinus | predaceous diving beetle |
| Coelambus nigrescens | predaceous diving beetle |
| Coelambus obscureplagiatus | predaceous diving beetle |
| Coelambus patruelis | Predaceous Diving Beetle |
| Coelambus picatus | predaceous diving beetle |
| Coelambus punctilineatus | Predaceous Diving Beetle |
| Coelambus salinarius | predaceous diving beetle |
| Coelambus semivittatus | Water Beetle |
| Coelambus suturalis | Predaceous Diving Beetle |
| Coelambus tumidiventris | Predaceous Diving Beetle |
| Coelambus turbidus | Predaceous Diving Beetle |
| Coelambus unguicularis | predaceous diving beetle |
| Coelocnemis californica | Darkling Beetle |
| Coelocnemis dilaticollis | Darkling Beetle |
| Coelus ciliatus | Darkling Beetle |
| Coenochroa californiella | Moth |
| Coenophila opacifrons | Cutworm Moth |
| Coenus delius | True Bug |
| Colenis impunctata | Small Carrion Beetle |
| Coleophora accordella | Moth |
| Coleophora acutipennella | Moth |
| Coleophora alnifoliae | Moth |
| Coleophora annulicola | Moth |
| Coleophora atriplicis | Moth |
| Coleophora bidentella | Moth |
| Coleophora brunneipennis | Moth |
| Coleophora cornella | Moth |
| Coleophora cratipennella | Streaked Coleophora |
| Coleophora cretaticostella | Moth |
| Coleophora duplicis | Moth |
| Coleophora elaeagnisella | Speckled Casebearer |
| Coleophora glaucella | Moth |
| Coleophora glaucicolella | Moth |
| Coleophora granulatella | Moth |
| Coleophora intermediella | Moth |
| Coleophora irroratella | Moth |
| Coleophora kearfottella | Moth |
| Coleophora klimeschiella | Russian Thistle Casebearer |
| Coleophora laricella | Larch Casebearer |
| Coleophora maritella | Moth |
| Coleophora multipulvella | Pistol Casebearer |
| Coleophora pruniella | Cherry Casebearer |
| Coleophora rosaefoliella | Moth |
| Coleophora rosaevorella | Moth |
| Coleophora rupestrella | Moth |
| Coleophora sacramenta | Moth |
| Coleophora seminella | Moth |
| Coleophora serratella | Cigar Casebearer |
| Coleophora simulans | Moth |
| Coleophora sparsiatomella | Moth |
| Coleophora sparsipulvella | Moth |
| Coleophora spinella | Apple & Plum Casebearer |
| Coleophora trifolii | Large Clover Casebearer |
| Coleophora vancouverensis | Moth |
| Coleophora wyethiae | Moth |
| Coleotechnites apicitripunctella | Green Hemlock Needleminer |
| Coleotechnites atrupictella | Moth |
| Coleotechnites blastovora | Moth |
| Coleotechnites canusella | Banded Jack-Pine Needleminer |
| Coleotechnites coniferella | Conifer Coleotechnites |
| Coleotechnites florae | Coleotechnites Flower Moth |
| Coleotechnites gibsonella | Moth |
| Coleotechnites granti | Moth |
| Coleotechnites huntella | Moth |
| Coleotechnites macleodi | Brown Hemlock Needleminer |
| Coleotechnites occidentis | Moth |
| Coleotechnites piceaella | Orange Spruce Needleminer |
| Coleotechnites pinella | Moth |
| Coleotechnites quercivorella | Moth |
| Coleotechnites starki | Moth |
| Coleotechnites thujaella | Brown Cedar Leafminer |
| Coleothorpa vittigera vittigera | Leaf Beetle |
| Colias chippewa chippewa | Chippewa Sulphur |
| Colias christina christina | Christina's Sulphur |
| Colias gigantea gigantea | Giant Sulphur |
| Colias gigantea mayi | Giant Sulphur |
| Colias hecla hecla | Hecla Sulphur |
| Colias meadii | Mead's Sulphur |
| Colias nastes aliaska | Arctic Sulphur |
| Colias occidentalis occidentalis | Western Sulphur |
| Colias pelidne | Pelidne Sulphur |
| Colibri thalassinus | Mexican Violetear |
| Colladonus arcanus | True Bug |
| Colladonus arctostaphyli | True Bug |
| Colladonus atriflavus | True Bug |
| Colladonus aureolus | True Bug |
| Colladonus balli | True Bug |
| Colladonus belli | True Bug |
| Colladonus eburatus | True Bug |
| Colladonus egenus | True Bug |
| Colladonus flavocapitatus | True Bug |
| Colladonus geminatus | True Bug |
| Colladonus holmesi | True Bug |
| Colladonus mendicus | True Bug |
| Colladonus montanus | True Bug |
| Colladonus nugax | True Bug |
| Colladonus reductus | True Bug |
| Colladonus rupinatus | True Bug |
| Colladonus tahotus | True Bug |
| Colladonus torneelus | True Bug |
| Colladonus waldanus | True Bug |
| Colladonus youngi | True Bug |
| Colletosia radiata | Bryozoa |
| Collinsia ksenia | Spider |
| Collinsia plumosa | Spider |
| Collops cribrosus | Soft-winged Flower Beetle |
| Collops discretus | Soft-winged Flower Beetle |
| Collops hirtellus | Soft-winged Flower Beetle |
| Collops versatilis | Soft-winged Flower Beetle |
| Collops versitalis | Soft-Winged Flower Beetle |
| Colobomatus embiotocae | Parasite |
| Colocasia propinquilinea | Closebanded Yellowhorn |
| Cololabis saira | Pacific Saury |
| Colon aedeagosum | Round Fungus Beetle |
| Colon asperatum | Mouse Nest Beetle |
| Colon basale | Small Scavenger Beetle |
| Colon bidentatum | Round Fungus Beetle |
| Colon boreale | Small Scavenger Beetle |
| Colon celatum | Round Fungus Beetle |
| Colon clavatum | Round Fungus Beetle |
| Colon complicatum | Round Fungus Beetle |
| Colon discretum | Round Fungus Beetle |
| Colon elongatum | Small Scavenger Beetle |
| Colon femorale | Round Fungus Beetle |
| Colon forceps | Mouse Nest Beetle |
| Colon hubbardi | Mouse Nest Beetle |
| Colon incisum | Small Scavenger Beetle |
| Colon inerme | Round Fungus Beetle |
| Colon kincaidi | Round Fungus Beetle |
| Colon lanceolatum | Small Scavenger Beetle |
| Colon magnicolle | Mouse Nest Beetle |
| Colon mesum | Small Scavenger Beetle |
| Colon nevadense | Round Fungus Beetle |
| Colon pacificum | Small Scavenger Beetle |
| Colon serratum | Small Scavenger Beetle |
| Colon serripoides | Round Fungus Beetle |
| Colon tibiale | Round Fungus Beetle |
| Colon vancouverense | Small Scavenger Beetle |
| Coloncus siou | Spider |
| Colopha ulmicola | True Bug |
| Colopterus truncatus | Pollen Beetle |
| Coloradia pandora | Pandora Pinemoth |
| Coloradoa artemisiae | True Bug |
| Colostygia circumvallaria | Moth |
| Columbaora cyclocoxa | Amphipod |
| Columella columella | Mellow Column |
| Colydium lineola | Cylindrical Bark Beetle |
| Colymbetes dahuricus | Predaceous Diving Beetle |
| Colymbetes densus | Predaceous Diving Beetle |
| Colymbetes densus densus | Beetle |
| Colymbetes dolabratus | Predaceous Diving Beetle |
| Colymbetes exaratus | Predaceous Diving Beetle |
| Colymbetes paykulli | Predacious Diving Beetle |
| Colymbetes sculptilis | Predaceous Diving Beetle |
| Comantella pacifica | Robber Fly |
| Comaroma mendocino | Spider |
| Commellus sexvittatus | True Bug |
| Compsidolon salicellum | True Bug |
| Conchoderma auritum | Humpback Whale Goose-Neck Barnacle |
| Conchoderma virgatum | Humpback Whale Goose-Neck Barnacle |
| Condica discistriga | Cutworm Moth |
| Condica mersa | Moth |
| Coniferocoris pinicolus | True Bug |
| Coniontis ovalis | Dune Beetle |
| Conipteryx canadensis | Lacewing |
| Conipteryx tineiformis | Lacewing |
| Conispora renalis | Parasite |
| Conopeum reticulum | Bryozoa |
| Conophthorus ponderosae | Palm Seed Borer |
| Contarinia quinquenotata | Hemerocallis Gall Midge |
| Contracaecum osculatum | Parasite |
| Contracaecum spiculigerum | Parasite |
| Conwentzia californica | Lacewing |
| Conwentzia pineticola | Lacewing |
| Cooperella subdiaphana | Clam |
| Copablepharon absidum | Cutworm Moth |
| Copablepharon spiritum | Moth |
| Copablepharon viridisparsa | Moth |
| Cophura albosetosa | Robber Fly |
| Cophura brevicornis | Robber Fly |
| Cophura scitula | Robber Fly |
| Cophura vitripennis | Robber Fly |
| Copiatestes filiferus | Parasite |
| Copidita quadrimaculata | False Blister Beetle |
| Copidozoum protectum | Bryozoa |
| Copidozoum tenuirostre | Bryozoa |
| Coprophilus sexualis | Spiny-legged Rove Beetle |
| Coproporus ventriculus | Crab-like Rove Beetle |
| Coptotomus longulus | Predaceous Diving Beetle |
| Coptotomus longulus longulus | Beetle |
| Coptotriche malifoliella | Apple Leaf Trumpet Miner |
| Coptotriche splendida | Moth |
| Coquillettia insignis | True Bug |
| Corambe pacifica | Pacific Corambe |
| Corambe steinbergae | Steinberg's Corambe |
| Coranarta macrostigma | Cutworm Moth |
| Cordalia obscura | Rove Beetle |
| Cordillonotus stellatus | True Bug |
| Coregonus autumnalis | Arctic Cisco |
| Coregonus nasus | Broad Whitefish |
| Coregonus sardinella | Least Cisco |
| Corella willmeriana | Transparent Tunicate |
| Coreorgonal bicornis | Sheetweb Spider |
| Coreorgonal monoceros | Sheetweb Spider |
| Corimelaena extensa | True Bug |
| Corimelaena incognita | True Bug |
| Corimelaena nigra | True Bug |
| Coriomeris humilis | True Bug |
| Coriomeris insularis | True Bug |
| Corisella decolor | True Bug |
| Corisella inscripta | True Bug |
| Coronula reginae | Acorn Barnacle |
| Corticaria columbia | Minute Brown Scavenger Beetle |
| Corticaria columbica | Minute Brown Scavenger Beetle |
| Corticaria dentigera | Minute Brown Scavenger Beetle |
| Corticaria fenestralis | Minute Brown Scavenger Beetle |
| Corticaria orbicollis | Minute Brown Scavenger Beetle |
| Corticaria pubescens | Minute Brown Scavenger Beetle |
| Corticaria salpingoides | Minute Brown Scavenger Beetle |
| Corticaria serrata | Minute Brown Scavenger Beetle |
| Corticaria valida | Minute Brown Scavenger Beetle |
| Corticaria varicolor | Minute Brown Scavenger Beetle |
| Corticarina cavicollis | Minute Brown Scavenger Beetle |
| Corticarina fuscula | Minute Brown Scavenger Beetle |
| Corticarina herbivagans | Minute Brown Scavenger Beetle |
| Corticarina minuta | Minute Brown Scavenger Beetle |
| Corticeus praetermissus | Comb-clawed Beetle |
| Corticeus subopacus | Darkling Beetle |
| Corticeus substriatus | Comb-clawed Beetle |
| Corticeus tenuis | Comb-clawed Beetle |
| Corticotomus caviceps | Bark-gnawing Beetle |
| Cortinicara gibbosa | Minute Brown Scavenger Beetle |
| Cortodera coniferae | Longhorned Beetle |
| Cortodera militaris militaris | Longhorned Beetle |
| Corylobium avellanae | True Bug |
| Corymbitodes caricinus | Click Beetle |
| Corymbitodes moerens | Glowing Click Beetle |
| Corymbitodes pygmaeus | Glowing Click Beetle |
| Coryne crassa | Hydroid |
| Corynoporella spinosa | Bryozoa |
| Corynosoma enhydri | Parasite |
| Corynosoma macrosomum | Parasite |
| Corynosoma strumosum | Parasite |
| Coryphaenoides armatus | Smooth Abyssal Grenadier |
| Coryphaenoides cinereus | Popeye |
| Coryphaenoides filifer | Filamented Grenadier |
| Coryphaenoides leptolepis | Ghostly Grenadier |
| Coryphaenoides yaquinae | Rough Abyssal Grenadier |
| Coryphium arizonense | Rove Beetle |
| Coryphium brunneum | Rove Beetle |
| Corythaica venusta | True Bug |
| Corythucha cydoniae | True Bug |
| Corythucha distincta | True Bug |
| Corythucha elegans | True Bug |
| Corythucha hewitti | True Bug |
| Corythucha immaculata | True Bug |
| Corythucha juglandis | True Bug |
| Corythucha marmorata | True Bug |
| Corythucha mollicula | True Bug |
| Corythucha morrilli | True Bug |
| Corythucha obliqua | True Bug |
| Corythucha padi | True Bug |
| Corythucha pergandei | True Bug |
| Corythucha salicata | True Bug |
| Cosipara tricoloralis | Tricolored Cosipara |
| Cosmia calami | American Dun-bar Moth |
| Cosmobaris scolopacea | Weevil |
| Cosmopepla conspicillaris | True Bug |
| Cosmopterix fernaldella | Fernald's Cosmopterix |
| Cosmopterix molybdina | Moth |
| Cosmopterix montisella | Moth |
| Cosmopterix scirpicola | Moth |
| Cosmopterix teligera | Moth |
| Cosmotettix beirnei | True Bug |
| Cosmotettix bilineatus | True Bug |
| Cosmotettix luteocephalus | True Bug |
| Cosmotettix paludosa | True Bug |
| Cossonus crenatus | Minute Seed Weevil |
| Cossonus piniphilus | Minute Seed Weevil |
| Cossonus quadricollis | Snout Beetle |
| Cossura longocirrata | Polychaete Worm |
| Cossura modica | Polychaete Worm |
| Cossura pygodactylata | Polychaete Worm |
| Costazia nordenskjoldi | Bryozoa |
| Costazia robertsoniae | Bryozoa |
| Costazia surcularis | Bryozoa |
| Cottus aleuticus | Coastrange Sculpin |
| Cottus cognatus | Slimy Sculpin |
| Cottus confusus | Shorthead Sculpin |
| Cottus hubbsi | Columbia Mottled Sculpin |
| Cottus rhotheus | Torrent Sculpin |
| Cottus ricei | Spoonhead Sculpin |
| Couesius plumbeus | Lake Chub |
| Crambidia casta | Pearly Lichen Moth |
| Crambidia impura | Tiger Moth |
| Crambus ainsliellus | Moth |
| Crambus alienellus | Moth |
| Crambus cockleellus | Moth |
| Crambus cypridalis | Moth |
| Crambus hamella | Moth |
| Crambus occidentalis | Moth |
| Crambus tutillus | Moth |
| Cranchia scabra | Glass Squid |
| Crangon alba | Stout Crangon |
| Crangonyx alpinus | Amphipod |
| Crangonyx richmondensis | Amphipod |
| Cranopsis decorata | Painted Puncturella |
| Craspedolepta angustipennis | True Bug |
| Craspedolepta canadensis | True Bug |
| Craspedolepta fumida | True Bug |
| Craspedolepta furcata | True Bug |
| Craspedolepta minutissima | True Bug |
| Craspedolepta nebulosa | True Bug |
| Craspedolepta schwarzi | True Bug |
| Craspedolepta subpunctata | True Bug |
| Craspedolepta vancouverensis | True Bug |
| Craspedolepta veaziei | True Bug |
| Craspedolepta vulgaris | True Bug |
| Crassicauda pacifica | Parasite |
| Crataraea suturalis | Beetle |
| Cratypedes lateritius | Nevada Red-Winged Grasshopper |
| Cratypedes neglectus | Red-Legged Grasshopper |
| Cremastocheilus armatus | Anteater Scarab Beetle |
| Cremastocheilus armatus armatus | Beetle |
| Cremastocheilus crinitus | Anteater Scarab Beetle |
| Cremastocheilus crinitus crinitus | Beetle |
| Crenella columbiana | Mussel |
| Crenella decussata | Cross-Sculpture Crenella |
| Crenitis alticola | Water Scavenger Beetle |
| Crenitis maculifrons | Minute Mud-loving Beetle |
| Crenitis malkini | Water Scavenger Beetle |
| Crenitis morata | Minute Mud-loving Beetle |
| Crenitis paradigma | Water Scavenger Beetle |
| Crenitis rufiventris | Water Scavenger Beetle |
| Crenitis snoqualmie | Water Scavenger Beetle |
| Creophilus maxillosus villosus | Beetle |
| Crepidodera digna | Leaf Beetle |
| Crepidodera heikertingeri | Skeletonizing Leaf Beetles and Flea Beetle |
| Crepidodera nana | Skeletonizing Leaf Beetles and Flea Beetle |
| Crepidodera populivora | Skeletonizing Leaf Beetles and Flea Beetle |
| Crepidodera sculpturata | Leaf Beetle |
| Crepidodera solita | Skeletonizing Leaf Beetles and Flea Beetle |
| Crepidodera spenceri | Leaf Beetle |
| Crepidostomum auriculatum | Parasite |
| Crepidostomum farionis | Parasite |
| Crepidula convexa | Convex Slippersnail |
| Crepidula nummaria | Northern White Slippersnail |
| Cribrilina annulata | Bryozoa |
| Cribrilina corbicula | Bryozoa |
| Cribrinopsis williamsi | Williams Anemone |
| Crinolinus intonsus | Rove Beetle |
| Criocoris saliens | True Bug |
| Crisia maxima | Bryozoa |
| Crisia occidentalis | Bryozoa |
| Crisia operculata | Bryozoa |
| Crisia pugeti | Bryozoa |
| Crisia serrulata | Bryozoa |
| Crisidia cornuta | Bryozoa |
| Cristatella mucedo | Bryozoa |
| Crophius angustatus | True Bug |
| Crophius bohemani | True Bug |
| Crophius disconotus | True Bug |
| Crophius ramosus | True Bug |
| Crossidius ater | Eucalyptus Borer |
| Crossota rufobrunnea | Jellyfish |
| Crucigera irregularis | Polychaete Worm |
| Crustulina sticta | Cobweb Weaver |
| Cryphalus pubescens | Palm Seed Borer |
| Cryphalus ruficollis ruficollis | Bark And Ambrosia Beetle |
| Cryphia cuerva | Cutworm Moth |
| Cryphia cuerva | Moth |
| Cryphia olivacea | Cutworm Moth |
| Cryphia olivacea | Moth |
| Cryphoeca exlineae | Hahniid Spider |
| Cryptachaea blattea | Spider |
| Cryptachaea canionis | Cobweb Weaver |
| Cryptaphis bromi | True Bug |
| Cryptaphis poae | True Bug |
| Cryptarcha ampla | Sap-feeding Beetle |
| Cryptarcha concinna | Sap-feeding Beetle |
| Cryptocephalus confluentus confluentus | Leaf Beetle |
| Cryptocephalus notatus | Cloaked Warty Leaf Beetle |
| Cryptocephalus notatus quadrimaculatus | Leaf Beetle |
| Cryptocephalus sanguinicollis | Cloaked Warty Leaf Beetle |
| Cryptocephalus sanguinicollis sanguinicollis | Cloaked Warty Leaf Beetle |
| Cryptocephalus spurcus vandykei | Leaf Beetle |
| Cryptochia furcata | Caddisfly |
| Cryptochia pilosa | Caddisfly |
| Cryptodius kelleri | Amphipod |
| Cryptodius unguidactylus | Amphipod |
| Cryptolestes ferrugineus | Rusty Grain Beetle |
| Cryptolestes pusillus | Flat Grain Beetle |
| Cryptolestes turcicus | Flat Bark Beetle |
| Cryptomya californica | California Softshell-Clam |
| Cryptomyzus galeopsidis | True Bug |
| Cryptomyzus ribis | True Bug |
| Cryptonatica affinis | Pale Northern Moonsnail |
| Cryptopeltaster lepidonotus | Red Sea Star |
| Cryptophagus acutangulus | Acute-Angled Fungus Beetle |
| Cryptophagus bidentatus | Silken Fungus Beetle |
| Cryptophagus cellaris | Silken Fungus Beetle |
| Cryptophagus confertus | Silken Fungus Beetle |
| Cryptophagus corticinus | Silken Fungus Beetle |
| Cryptophagus dentatus | Silken Fungus Beetle |
| Cryptophagus difficilis | Silken Fungus Beetle |
| Cryptophagus distinguendus | Silken Fungus Beetle |
| Cryptophagus hebes | Silken Fungus Beetle |
| Cryptophagus histricus | Silken Fungus Beetle |
| Cryptophagus jakowlewi | Silken Fungus Beetle |
| Cryptophagus lapponicus | Silken Fungus Beetle |
| Cryptophagus laticollis | Silken Fungus Beetle |
| Cryptophagus maximus | Silken Fungus Beetle |
| Cryptophagus peregrinus | Silken Fungus Beetle |
| Cryptophagus pilosus | Silken Fungus Beetle |
| Cryptophagus porrectus | Silken Fungus Beetle |
| Cryptophagus saginatus | Silken Fungus Beetle |
| Cryptophagus setulosus | Silken Fungus Beetle |
| Cryptophagus subfumatus | Silken Fungus Beetle |
| Cryptophagus tuberculosus | Silken Fungus Beetle |
| Cryptophagus varus | Sigmoid Fungus Beetle |
| Cryptopleurum minutum | Giant Water Scavenger Beetle |
| Cryptopleurum subtile | Giant Water Scavenger Beetle |
| Cryptoscatomaseter browni | Scarab Beetle |
| Cryptotermes brevis | West Indian Drywood Termite |
| Crypturgus borealis | Palm Seed Borer |
| Ctenarytaina eucalypti | True Bug |
| Ctenicera arata | Click Beetle |
| Ctenicera bipunctata | Click Beetle |
| Ctenicera bombycina | Click Beetle |
| Ctenicera callida | Click Beetle |
| Ctenicera carbo | Click Beetle |
| Ctenicera caricina | Click Beetle |
| Ctenicera comes | Click Beetle |
| Ctenicera conjungens | Click Beetle |
| Ctenicera diversicolor | Click Beetle |
| Ctenicera glauca | Dryland Wireworm |
| Ctenicera hoppingi | Click Beetle |
| Ctenicera kendalli | Glowing Click Beetle |
| Ctenicera laricis | Click Beetle |
| Ctenicera lateralis | Click Beetle |
| Ctenicera mendax | Click Beetle |
| Ctenicera montana | Click Beetle |
| Ctenicera morula | Click Beetle |
| Ctenicera nebraskensis | Click Beetle |
| Ctenicera nigricans | Click Beetle |
| Ctenicera nigricollis | Click Beetle |
| Ctenicera nitidula | Click Beetle |
| Ctenicera propola columbiana | Click Beetle |
| Ctenicera pruinina | Great Basin Wireworm |
| Ctenicera pulchra | Click Beetle |
| Ctenicera serricornis | Click Beetle |
| Ctenicera stricklandi | Glowing Click Beetle |
| Ctenicera tristis | Click Beetle |
| Ctenicera triundulata | Click Beetle |
| Ctenicera uliginosa | Click Beetle |
| Ctenicera vidua | Click Beetle |
| Ctenicera weidtii | Click Beetle |
| Ctenocallis setosus | True Bug |
| Ctenodrillus serratus | Polychaete Worm |
| Cucullanellus kanabus | Parasite |
| Cucullanus annulatus | Parasite |
| Cucullanus elongatus | Parasite |
| Cucullia albida | Moth |
| Cucullia antipoda | Cutworm Moth |
| Cucullia dorsalis | Moth |
| Cucullia eulepis | Cutworm Moth |
| Cucullia florea | Cutworm Moth |
| Cucullia mcdunnoughi | Cutworm Moth |
| Cucullia omissa | Cutworm Moth |
| Cucullia postera | Cutworm Moth |
| Cucullia pulla | Cutworm Moth |
| Cucullia similaris | Cutworm Moth |
| Cucullia speyeri | Cutworm Moth |
| Cucullia strigata | Cutworm Moth |
| Cuculus canorus | Common Cuckoo |
| Cucumaria pseudocurata | Tar Spot Sea Cucumber |
| Cuerna cuesta | True Bug |
| Cuerna septentrionalis | True Bug |
| Culiseta alaskaensis | Mosquito |
| Culiseta impatiens | Mosquito |
| Culiseta inornata | Mosquito |
| Culiseta minnesotae | Mosquito |
| Culiseta morsitans | Mosquito |
| Cultus aestivalis | Stonefly |
| Cultus pilata | Stonefly |
| Cultus tostonus | Stonefly |
| Cumanotus fernaldi | Fernald's Aeolis |
| Cuniberta subtinctella | Moth |
| Cupido amyntula amyntula | Western Tailed Blue |
| Cupido comyntas comyntas | Eastern Tailed Blues |
| Cupido comyntas pacnowe | Eastern Tailed Blue |
| Cupila excavata | Ant-loving Beetle |
| Curculio aurivestis | Snout Beetle |
| Curculio uniformis | Nut and Acorn Weevil |
| Cuspidaria apodema | Cuspidaria Clam |
| Cuspidaria cowani | Cockle |
| Cuthona albocrusta | White-Crusted Cuthona |
| Cuthona concinna | Neat Cuthona |
| Cuthona divae | Diva's cuthona |
| Cuthona punicea | Pomegranate Aeolid |
| Cuthona pustulata | White-pimple Cuthona |
| Cuthona viridis | Green Cuthona |
| Cyamus catadontis | Amphipod |
| Cyamus ceti | Amphipod |
| Cyamus erraticus | Amphipod |
| Cyamus gracilis | Amphipod |
| Cyamus kessleri | Amphipod |
| Cyanoplax hartwegii | Hartweg's Baby Chiton |
| Cyathostoma bronchialis | Parasite |
| Cybaeina confusa | Cybaeid Spider |
| Cybaeina minuta | Cybaeid Spider |
| Cybaeopsis euopla | Hackledmesh Weaver |
| Cybaeopsis wabritaska | Hackledmesh Weaver |
| Cybaeota nana | Spider |
| Cybaeota shastae | Cybaeid Spider |
| Cybaeus bulbosus | Cybaeid Spider |
| Cybaeus eutypus | Cybaeid Spider |
| Cybaeus morosus | Cybaeid Spider |
| Cybaeus reticulatus | Cybaeid Spider |
| Cybaeus shoshoneus | Cybaeid Spider |
| Cybaeus sinuosus | Cybaeid Spider |
| Cybaeus sp. | Cybaeid Spider |
| Cybister fimbriolatus | Predaceous Diving Beetle |
| Cybocephalus californicus | Lined Flat Bark Beetle |
| Cychrus hemphillii rickseckeri | Rare Snail-eating Beetle |
| Cychrus rickseckeri | Ground Beetle |
| Cyclocardia crassidens | Cockle Clam |
| Cyclocardia ventricosa | Stout Cyclocardia |
| Cyclocephala longula | Masked Chafer |
| Cyclocypris ampla | Seed Shrimp |
| Cyclocypris kincaidia | Seed Shrimp |
| Cyclocypris laevis | Seed Shrimp |
| Cyclocypris ovum | Seed Shrimp |
| Cyclocypris serena | Seed Shrimp |
| Cyclocypris sharpei | Seed Shrimp |
| Cyclodinus paiute | pseudo |
| Cyclopecten carlottensis | Scallop |
| Cyclopecten davidsoni | Clam |
| Cyclopecten greenlandicus | Greenland Glass-Scallop |
| Cyclopecten knudseni | Clam |
| Cyclothone atraria | Yellow Bristlemouth |
| Cyclothone pallida | Tan Bristlemouth |
| Cyclothone pseudopallida | Phantom Bristlemouth |
| Cyclothone signata | Showy Bristlemouth |
| Cycnia oregonensis | Oregon Cycnia Moth |
| Cydia americana | Moth |
| Cydia bracteatana | Moth |
| Cydia confusana | Moth |
| Cydia coniferana | Moth |
| Cydia flexiloqua | Moth |
| Cydia inopiosa | Moth |
| Cydia laricana | Moth |
| Cydia lautiuscula | Moth |
| Cydia miscitata | Moth |
| Cydia nigricana | Pea Moth |
| Cydia obnisa | Moth |
| Cydia piperana | Ponderosa Pine Seedworm Moth |
| Cydia populana | Moth |
| Cydia prosperana | Moth |
| Cydia pseudotsugae | Moth |
| Cydia rana | Moth |
| Cydia toreuta | Eastern Pine Seedworm Moth |
| Cydia youngana | Moth |
| Cylichna cylindracea | Sea Snail |
| Cylindera terricola imperfecta | American Diminutive Tiger Beetle |
| Cylindrocopturus deleoni | Minute Seed Weevil |
| Cylindrocopturus furnissi | Douglas-fir Twig Weevil |
| Cylindrocopturus helianthus | Weevil |
| Cylindroiulus latestriatus | Millipede |
| Cylindroiulus vulnerarius | Millipede |
| Cylindroporella tubulosa | Bryozoa |
| Cymadusa uncinata | Amphipod |
| Cymatia americana | True Bug |
| Cymatodera decipiens | Checkered Beetle |
| Cymatodera ovipennis | Checkeredbeetle |
| Cymbiodyta acuminata | Minute Mud-loving Beetle |
| Cymbiodyta columbiana | Water Scavenger Beetle |
| Cymindis planipennis | Flat-horned Ground Beetle |
| Cymus coriacipennis | True Bug |
| Cymus luridus | True Bug |
| Cynaeus angustus | Larger Black Flour Beetle |
| Cypha crotchi | Rove Beetle |
| Cypha crotchii | Rove Beetle |
| Cyphocaris anonyx | Amphipod |
| Cyphocaris challengeri | Amphipod |
| Cyphocaris guilelmi | Amphipod |
| Cyphocaris richardi | Amphipod |
| Cyphon brevicollis | Marsh Beetle |
| Cyphon exiguus | Marsh Beetle |
| Cyphon punctatus | Marsh Beetle |
| Cyphon pusillus | Marsh Beetle |
| Cyphon variabilis | Marsh Beetle |
| Cypria ophthalmica | Seed Shrimp |
| Cypricercus horridus | Seed Shrimp |
| Cypricercus reticulatus | Seed Shrimp |
| Cyprinotus incongruens | Seed Shrimp |
| Cyprois marginata | Seed Shrimp |
| Cyrtomoptera divisa | Soldier Beetle |
| Cyrtorhinus caricis | True Bug |
| Cyrtusa subtestacea | Small Carrion Beetle |
| Cystechinus loveni | Pyramid Sea Urchin |
| Cysticercus mustelae | Parasite |
| Cysticercus pisiformis | Parasite |
| Cystidicola farionis | Parasite |
| Cystisoma fabricii | Amphipod |
| Cystisoma pellucidus | Amphipod |
| Cystocrepis setigera | Deep Sea Urchin |
| Cystoopsis acipenseris | Parasite |
| Cytherissa lacustris | Seed Shrimp |
| Cytilus mimicus | Pill Beetle |
| Dacne californica | Pleasing Fungus Beetle |
| Dacne picea | Pleasing Fungus Beetle |
| Dacota hesperia | True Bug |
| Dacrydium pacificum | Date Mussel |
| Dactylochelifer silvestris | Pseudoscorpion |
| Dahlica lichenella | Moth |
| Dakaria dawsoni | Bryozoa |
| Dakaria ordinata | Bryozoa |
| Dakaria pristina | Bryozoa |
| Daktulosphaira vitifoliae | True Bug |
| Dallasiellus discrepans | True Bug |
| Dallicordia alaskana | Verticord Clam |
| Dalopius asellus | Click Beetle |
| Dalopius corvinus | Brown Wireworm |
| Dalopius fucatus | Click Beetle |
| Dalopius gartrelli | Click Beetle |
| Dalopius inordinatus | Click Beetle |
| Dalopius insolens | Click Beetle |
| Dalopius maritimus | Click Beetle |
| Dalopius mirabilis | Brown Wireworm |
| Dalopius pallidus | Brown Wireworm |
| Dalopius spretus | Click Beetle |
| Dalopius suspectus | Brown Wireworm |
| Dalopius tristis | Click Beetle |
| Dalotia coriaria | Rove Beetle |
| Dampfius inciertus | Variegated Mud-loving Beetle |
| Danaphos oculatus | Bottlelight |
| Danosoma obtectum | Rain Click Beetle |
| Daphnia ambigua | Water Flea |
| Daphnia laevis | Water Flea |
| Daphnia longiremis | Water Flea |
| Daphnia middendorffiana | Water Flea |
| Daphnia parvula | Water Flea |
| Darapsa choerilus | Azalea Sphinx Moth |
| Darwinula stevensoni | Seed Shrimp |
| Dasychira plagiata | Tussock Moth |
| Dasycorixa hybrida | True Bug |
| Dasycorixa johanseni | True Bug |
| Dasycorixa rawsoni | True Bug |
| Dasyfidonia avuncularia | Red-winged Wave |
| Dasypyga alternosquamella | Moth |
| Dasyrhadus impressicollis | Checkered Beetle |
| Dasystoma salicella | Blueberry Flagleaf Webworm |
| Dasytes cruralis | Soft-Winged Flower Beetle |
| Datana ministra | Prominent |
| Datomicra surgens | Rove Beetle |
| Dearthrus stebbinsi | Carpet Beetle |
| Decamastus gracilis | Polychaete Worm |
| Decantha boreasella | Reticulated Decantha |
| Decantha stonda | Moth |
| Decantha tistra | Moth |
| Decodes fragariana | Moth |
| Decodes horariana | Moth |
| Decodes macdunnoughi | Moth |
| Deflexilodes enigmaticus | Amphipod |
| Deflexilodes similis | Amphipod |
| Deinopteroloma pictum | Ocellate Rove Beetle |
| Dejongia lobidactylus | Lobed Plume Moth |
| Deleaster concolor | Rove Beetle |
| Delphacodes albostriata | True Bug |
| Delphacodes analis | True Bug |
| Delphacodes anufrievi | True Bug |
| Delphacodes arcanistyla | True Bug |
| Delphacodes campestris | True Bug |
| Delphacodes consimilis | True Bug |
| Delphacodes emeljanovi | True Bug |
| Delphacodes foveata | True Bug |
| Delphacodes gillettei | True Bug |
| Delphacodes incurva | True Bug |
| Delphacodes kilmani | True Bug |
| Delphacodes lineatipes | True Bug |
| Delphacodes litoralis | True Bug |
| Delphacodes lutulenta | True Bug |
| Delphacodes lutulentoides | True Bug |
| Delphacodes magna | True Bug |
| Delphacodes neocclusa | True Bug |
| Delphacodes occlusa | True Bug |
| Delphacodes pedaforma | True Bug |
| Delphacodes propinqua | True Bug |
| Delphiniobium canadensis | True Bug |
| Delphinus capensis | Common Dolphin |
| Delphinus delphis | Short-beaked Common Dolphin |
| Deltocephalus balli | True Bug |
| Deltocephalus castoreus | True Bug |
| Deltocephalus fuscinervosus | True Bug |
| Deltocephalus lineatifrons | True Bug |
| Deltocephalus nigriventer | True Bug |
| Deltocephalus vanduzeei | True Bug |
| Deltocephalus vanfus | True Bug |
| Deltocephalus zephyrius | True Bug |
| Deltote bellicula | Cutworm Moth |
| Dendrobaena attemsi | Earthworm |
| Dendrobathypathes boutillieri | Black Coral |
| Dendrobeania curvirostrata | Bryozoa |
| Dendrobeania laxa | Bryozoa |
| Dendrobeania simplex | Bryozoa |
| Dendrochiton semiliratus | Chiton |
| Dendrocoris pini | True Bug |
| Dendroctonus brevicomis | Bark and Ambrosia Beetle |
| Dendroctonus murrayanae | Lodgepole Pine Beetle |
| Dendroctonus pseudotsugae | Douglas-Fir Beetle |
| Dendroctonus punctatus | Boreal Spruce Beetle |
| Dendroctonus simplex | Eastern Larch Beetle |
| Dendroctonus valens | Red Turpentine Beetle |
| Dendrodrilus rubidus | European Bark Worm |
| Dendroides ephemeroides | Fire-Colored Beetle |
| Dendroides marginatus | Fire-Colored Beetle |
| Dendroides picipes | Fire-Colored Beetle |
| Dendrolasma mirabile | Coral-nosed Harvestman |
| Dendroleon speciosum | Antlion |
| Dendronotus albopunctatus | White-spotted Dendronotus |
| Dendronotus albus | White Dendronotus |
| Dendronotus dalli | Dall's Dendronotid |
| Dendronotus frondosus | Frond Dendronotus |
| Dendronotus subramosus | Stubby-branched Dendronotus |
| Dendrophagus cygnaei | Silvanid Flat Bark Beetle |
| Dendrophilus punctatus | Clown Beetle |
| Dendrophilus xavieri | Clown Beetle |
| Dendryphantes nigromaculatus | Jumping Spider |
| Denisia haydenella | Moth |
| Denticollis denticornis | Glowing Click Beetle |
| Denticollis varians | Glowing Click Beetle |
| Depressaria alienella | Moth |
| Depressaria angustati | Moth |
| Depressaria artemisiae | Moth |
| Depressaria artemisiella | Moth |
| Depressaria daucella | Moth |
| Depressaria togata | Moth |
| Deraeocapsus fraternus | True Bug |
| Deraeocoris albigulus | True Bug |
| Deraeocoris bakeri | True Bug |
| Deraeocoris barberi | True Bug |
| Deraeocoris brevis | True Bug |
| Deraeocoris diveni | True Bug |
| Deraeocoris fasciolus fasciolus | True Bug |
| Deraeocoris fulgidus | True Bug |
| Deraeocoris fulvescens | True Bug |
| Deraeocoris incertus | True Bug |
| Deraeocoris kennicotti | True Bug |
| Deraeocoris mutatus | True Bug |
| Deraeocoris ornatus | True Bug |
| Deraeocoris piceicola | True Bug |
| Deraeocoris punctulatus | True Bug |
| Deraeocoris rubroclarus | True Bug |
| Deraeocoris sayi | True Bug |
| Deraeocoris schwarzii | True Bug |
| Deraeocoris triannulipes | True Bug |
| Deraeocoris validus | True Bug |
| Derepodichthys alepidotus | Cuskpout |
| Deretaphrus oregonensis | Dry Bark Beetle |
| Deretrema cholaeum | Parasite |
| Dermatomya tenuisconcha | Clam |
| Dermestes caninus | Tropical Powderpost Beetle |
| Dermestes caninus caninus | Beetle |
| Dermestes carnivorus | Tropical Powderpost Beetle |
| Dermestes frischii | Carpet Beetle |
| Dermestes maculatus | Hide Beetle |
| Dermestes marmoratus | Carpet Beetle |
| Dermestes rattus rattus | Beetle |
| Dermestes reductus | Tropical Powderpost Beetle |
| Dermestes signatus | Tropical Powderpost Beetle |
| Dermestes talpinus | Carpet Beetle |
| Dermestes tristis | Carpet Beetle |
| Deroceras hesperium | Evening Fieldslug |
| Derocrepis oregoni | Leaf Beetle |
| Derogenes varicus | Parasite |
| Desdimelita barnardi | Amphipod |
| Desdimelita californica | Amphipod |
| Desdimelita desdichada | Amphipod |
| Desdimelita microdentata | Amphipod |
| Desdimelita transmelita | Amphipod |
| Deshayesiella spicata | Chiton |
| Desmacella annexa | Sponge |
| Desmacystis sandalia | Bryozoa |
| Desmia funeralis | Grape Leaffolder Moth |
| Desmidocercella numidica | Parasite |
| Desmocerus auripennis auripennis | Longhorned Beetle |
| Desmophyllum dianthus | Stony Coral |
| Despaxia angusta | Stonefly |
| Detonella papillicornis | Isopod |
| Deutella californica | Amphipod |
| Devia prospera | Rove Beetle |
| Diachus aeruginosus | Leaf Beetle |
| Diachus auratus | Bronze Leaf Beetle |
| Diachus catarius | Leaf Beetle |
| Diacme adipaloides | Darker Diacme |
| Diala marmorea | Sea Snail |
| Dialeurodes chitendeni | True Bug |
| Dialytodius decipiens | Hide Beetle |
| Dialytodius rogersi | Scarab Beetle |
| Diaperoecia intermedia | Bryozoa |
| Diaperoecia johnstoni | Bryozoa |
| Diaphana pellucida | Pellucid Glass Snail |
| Diaphorodoris lirulatocauda | Ridge-tailed Dorid |
| Diapterna hamata | Hide Beetle |
| Diapterna hyperborea | Scarab Beetle |
| Diapterna omissa | Pond Litter Beetle |
| Diapterna pinguella | Hide Beetle |
| Diarsia calgary | Cutworm Moth |
| Diarsia dislocata | Cutworm Moth |
| Diaspidiotus aesculi | True Bug |
| Diastictis ventralis | White-spotted Brown Moth |
| Diaulota densissima | Rove Beetle |
| Dibolia libonoti | Leaf Beetle |
| Dibolia penstemonis | Leaf Beetle |
| Dicentrus bidentatus | Long-horned Beetle |
| Dicerca callosa callosa | Metallic Wood Boring Beetles |
| Dicerca callosa frosti | Metallic Wood-boring Beetle |
| Dicerca caudata | Metallic Wood-boring Beetle |
| Dicerca hornii hornii | Metallic Wood-boring Beetle |
| Dichaetocoris piceicola | True Bug |
| Dicheirotrichus mannerheimii mannerheimii | Beetle |
| Dicheirus piceus | False Bombardier Beetle |
| Dichelia histrionana | Moth |
| Dichelonyx backii | Rose Chafer |
| Dichelonyx backii backii | Beetle |
| Dichelonyx truncata | Rose Chafer |
| Dichelonyx vicina | Rose Chafer |
| Dichelotarsus cavicollis cavicollis | Beetle |
| Dichelotarsus deceptus | Deceptive Soldier Beetle |
| Dichelotarsus excursus excursus | Beetle |
| Dichelotarsus extremus | Soldier Beetle |
| Dichelotarsus fissilis | Soldier Beetle |
| Dichelotarsus flavimanus | Soldier Beetle |
| Dichelotarsus furtivus | Furtive Soldier Beetle |
| Dichelotarsus hackerae | Soldier Beetle |
| Dichelotarsus heteronychus | Soldier Beetle |
| Dichelotarsus instabilis | Soldier Beetle |
| Dichelotarsus laevicollis | Soldier Beetle |
| Dichelotarsus lutosus | Soldier Beetle |
| Dichelotarsus lygarius | Soldier Beetle |
| Dichelotarsus macer | Soldier Beetle |
| Dichelotarsus melvillei | Soldier Beetle |
| Dichelotarsus obscurevittatus | Dark-striped Soldier Beetle |
| Dichelotarsus ochocensis | Soldier Beetle |
| Dichelotarsus perplexus | Obscure Soldier Beetle |
| Dichelotarsus piceatus | Soldier Beetle |
| Dichelotarsus piniphilus | Soldier Beetle |
| Dichelotarsus puncticollis | Soldier Beetle |
| Dichelotarsus pustulatus | Soldier Beetle |
| Dichelotarsus rossi | Soldier Beetle |
| Dichelotarsus scaber | Soldier Beetle |
| Dichelotarsus smithi | Soldier Beetle |
| Dichelotarsus tetragonoderus | Flour-plated Soldier Beetle |
| Dichochrysa perfecta | Green Lacewing |
| Dichomeris bilobella | Bilobed Dichomeris |
| Dichomeris flavocostella | Cream-edged Dichomeris |
| Dichomeris gnoma | Moth |
| Dichomeris leuconotella | Moth |
| Dichomeris levisella | Moth |
| Dichomeris ligulella | Palmerworm Moth |
| Dichomeris offula | Moth |
| Dichomeris purpureofusca | Moth |
| Dichomeris simpliciella | Moth |
| Dichomeris stipendiaria | Moth |
| Dichorda rectaria | Moth |
| Dichrooscytus convexifrons | True Bug |
| Dichrooscytus flagellatus | True Bug |
| Dichrooscytus flavescens | True Bug |
| Dichrooscytus irroratus | True Bug |
| Dichrooscytus latifrons | True Bug |
| Dichrooscytus rainieri | True Bug |
| Dichrooscytus rostratus | True Bug |
| Dichrooscytus ruberellus | True Bug |
| Dichrooscytus rubidus | True Bug |
| Dichrooscytus rufusculus | True Bug |
| Dichrorampha piperana | Moth |
| Dichrorampha radicicolana | Moth |
| Dichrorampha sedatana | Moth |
| Dichrorampha simulana | Moth |
| Dicosmoecus schmidi | Caddisfly |
| Dictyla labeculata | True Bug |
| Dictyna alaskae | Spider |
| Dictyna bostoniensis | Meshweaver |
| Dictyna brevitarsa | Meshweaver |
| Dictyna calcarata | Meshweaver |
| Dictyna coloradensis | Meshweaver |
| Dictyna major | Meshweaver |
| Dictyna minuta | Meshweaver |
| Dictyna subpinicola | Meshweaver |
| Dictyna terrestris | Meshweaver |
| Dictyna tridentata | Meshweaver |
| Dictyociona  asodes | Sponge |
| Dictyonota fuliginosa | True Bug |
| Dictyoptera aurora | Net-Winged Beetle |
| Dictyoptera hamatus | Net-Winged Beetle |
| Dictyoptera thoracicus | Net-Winged Beetle |
| Dicymolomia metalliferalis | Moth |
| Dicyphus discrepans | True Bug |
| Dicyphus hesperus | True Bug |
| Dicyphus pallicornis | True Bug |
| Dicyphus vestitus | True Bug |
| Didion longulum | Spider Mite Destroyer |
| Didion punctatum | Spider Mite Destroyer |
| Dienerella filum | Minute Brown Scavenger Beetle |
| Dienerella ruficollis | Minute Brown Scavenger Beetle |
| Dietzella zimmermanni | Minute Seed Weevil |
| Dietzella zimmermannii | Beetle |
| Digrammia californiaria | Californian Granite |
| Digrammia delectata | Granite |
| Digrammia denticulata | Moth |
| Digrammia extenuata | Moth |
| Digrammia nubiculata | Moth |
| Digrammia setonana | Moth |
| Digrammia sexpunctata | Six-spotted Digrammia |
| Digrammia subminiata | Moth |
| Digrammia triviata | Moth |
| Digrammia ubiquitata | Moth |
| Dikraneura abnormis | True Bug |
| Dikraneura absenta | True Bug |
| Dikraneura carneola | True Bug |
| Dikraneura mali | True Bug |
| Dikraneura omani | True Bug |
| Dikraneura rufula | True Bug |
| Dikraneura variata | True Bug |
| Dikrella californica | True Bug |
| Dilepis undula | Parasite |
| Dimetrota alaskana | Rove Beetle |
| Dimetrota omissa | Rove Beetle |
| Dimetrota resplendens | Rove Beetle |
| Dimetrota retrusa | Rove Beetle |
| Dimetrota stercoris | Rove Beetle |
| Dimetrota vicaria | Rove Beetle |
| Dimophyes arctica | Jellyfish |
| Dina anoculata | Freshwater Leech |
| Dineutus assimilis | Whirligig Beetle |
| Dinoderus minutus | Bamboo Powderpost Beetle |
| Dinophilus kincaidi | Polychaete Worm |
| Dinothenarus capitatus | Rove Beetle |
| Dinothenarus nigrellus | Large Rove Beetle |
| Dinothenarus pleuralis | Large Rove Beetle |
| Dinothenarus saphyrinus | Large Rove Beetle |
| Dinurus nanaimoensis | Parasite |
| Diocalandra elongata | Snout Beetle |
| Diopatra ornata | Ornate Tubeworm |
| Dioryctria abietivorella | Evergreen Coneworm Moth |
| Dioryctria auranticella | Ponderosa Pineconeworm |
| Dioryctria banksiella | Moth |
| Dioryctria cambiicola | Western Pine Moth |
| Dioryctria contortella | Moth |
| Dioryctria monticolella | Moth |
| Dioryctria okanaganella | Moth |
| Dioryctria pentictonella | Moth |
| Dioryctria ponderosae | Moth |
| Dioryctria pseudotsugella | Moth |
| Dioryctria reniculelloides | Spruce Coneworm Moth |
| Dioryctria rossi | Moth |
| Dioryctria tumicolella | Moth |
| Dioryctria vancouverella | Moth |
| Dioryctria zimmermani | Zimmerman Pine Moth |
| Dipetalonema arbuta | Parasite |
| Diphetor hageni | Hagen's Small Minnow Mayfly |
| Diphyllobothrium dendriticum | Parasite |
| Diplocentria bidentata | Sheetweb Spider |
| Diplocentria perplexa | Sheetweb Spider |
| Diplocentria rectangulata | Sheetweb Spider |
| Diplocephalus cristatus | Sheetweb Spider |
| Diplocephalus sphagnicola | Sheetweb Spider |
| Diplocephalus subrostratus | Sheetweb Spider |
| Diplocheila obtusa | Colorful Foliage Ground Beetle |
| Diplocheila striatopunctata | Colorful Foliage Ground Beetle |
| Diplocolenus brevior | True Bug |
| Diplocolenus evansi | True Bug |
| Diplodonta impolita | Rough Diplodon |
| Diploschizia impigritella | Yellow Nutsedge Moth |
| Diplosolen obelium | Bryozoa |
| Diplostomum baeri bucculentum | Parasite |
| Diplostyla concolor | Spider |
| Diplotaxis brevicollis | May Beetle |
| Diplotaxis obscura | May Beetle |
| Diplotaxis subangulata | May Beetle |
| Diplotaxis tenebrosa | May Beetle |
| Diplous californicus | Round Sand Beetle |
| Diplous filicornis | Ground Beetle |
| Dipoena malkini | Cobweb Weaver |
| Dipoena nigra | Cobweb Weaver |
| Dipoena provalis | Cobweb Weaver |
| Dipolydora armata | Polychaete Worm |
| Dipolydora brachycephala | Polychaete Worm |
| Dipolydora cardalia | Polychaete Worm |
| Dipolydora commensalis | Polychaete Worm |
| Dipolydora giardi | Polychaete Worm |
| Dipolydora quadrilobata | Polychaete Worm |
| Dipolydora socialis | Polychaete Worm |
| Dircaea horiei | False Darkling Beetle |
| Dirhagus pectinatus | False Click Beetle |
| Dirofilaria ursi | Parasite |
| Discinisca lamellosa | Round Tiny Inarticulate Discinisca Lamp Shell |
| Discocytis canadensis | Bryozoa |
| Discoderus parallelus | False Bombardier Beetle |
| Discodoris heathi | Gastropod |
| Discurria insessa | Seaweed Limpet |
| Disembolus convolutus | Sheetweb Spider |
| Disembolus hyalinus | Sheetweb Spider |
| Dismodicus alticeps | Sheetweb Spider |
| Dismodicus decemoculatus | Sheetweb Spider |
| Disonycha latifrons | Skeletonizing Leaf Beetles and Flea Beetle |
| Disonycha latiovittata | Skeletonizing Leaf Beetles and Flea Beetle |
| Disonycha procera | Skeletonizing Leaf Beetles and Flea Beetle |
| Disonycha triangularis | Threespotted Flea Beetle |
| Disporella astraea | Bryozoa |
| Disporella fimbriata | Bryozoa |
| Disporella hispida | Bryozoa |
| Dissosteira pictipennis | Grasshopper |
| Dissosteira spurcata | Grasshopper |
| Distigmoptera borealis | Skeletonizing Leaf Beetles and Flea Beetle |
| Ditylus gracilis | False Blister Beetle |
| Diura knowltoni | Stonefly |
| Diuraphis frequens | True Bug |
| Diuraphis mexicana | True Bug |
| Diuraphis noxia | True Bug |
| Diurodrilus ankeli | Polychaete Worm |
| Doddsia occidentalis | Stonefly |
| Dodecaceria concharum | Coralline-Encased Filament-Worm |
| Dodia albertae | Moth |
| Dolerosomus blaisdelli | ctenicera |
| Dolichocis indistinctus | Minute Tree-Fungus Beetle |
| Dolichocis manitoba | Minute Tree-Fungus Beetle |
| Dolichosoma foveicolle | Soft-winged Flower Beetle |
| Dolichovespula alpicola | Rocky Mountain Aerial Yellowjacket |
| Dolichovespula norwegica | Norwegian Yellowjacket |
| Dolophilodes aequalis | Caddisfly |
| Dolophilodes novusamericanus | Caddisfly |
| Dolophilodes pallidipes | Caddisfly |
| Dolotarsus lividus | False Darkling Beetle |
| Dolurgus pumilus | Palm Seed Borer |
| Donacaula albicostellus | Moth |
| Donacia cazieri | Leaf Beetle |
| Donacia cincticornis | Aquatic Leaf Beetle |
| Donacia confluenta | Leaf Beetle |
| Donacia distincta | Aquatic Leaf Beetle |
| Donacia hirticollis | Aquatic Leaf Beetle |
| Donacia magnifica | Aquatic Leaf Beetle |
| Donacia porosicollis | Aquatic Leaf Beetle |
| Donacia proxima | Aquatic Leaf Beetle |
| Donacia pubescens | Aquatic Leaf Beetle |
| Donacia subtilis | Leaf Beetle |
| Donacia tuberculifrons | Leaf Beetle |
| Doratura stylata | True Bug |
| Dorcasina matthewsii | Long-horned Beetle |
| Dorcatoma integra | Deathwatch Beetle |
| Doriopsilla albopunctata | White-spotted Dorid |
| Doroneuria baumanni | Stonefly |
| Doroneuria theodora | Stonefly |
| Dorvillea longicornis | Polychaete Worm |
| Dorycara omanae | True Bug |
| Doryporella alcicornis | Bryozoa |
| Dorytomus frostii | Nut and Acorn Weevil |
| Dorytomus hirtus | Snout Beetle |
| Dorytomus inaequalis | Nut and Acorn Weevil |
| Dorytomus laticollis | Nut and Acorn Weevil |
| Dorytomus leucophyllus | Nut and Acorn Weevil |
| Dorytomus luridus | Nut and Acorn Weevil |
| Dorytomus mannerheimi | Nut and Acorn Weevil |
| Dorytomus parvicollis | Nut and Acorn Weevil |
| Dorytomus rufulus | Nut and Acorn Weevil |
| Dorytomus vagenotatus | Nut and Acorn Weevil |
| Doto amyra | Corn-cob Doto |
| Doto columbiana | British Columbia Doto |
| Doto kya | Seal Dotto |
| Draeculacephala angulifera | True Bug |
| Draeculacephala antica | True Bug |
| Draeculacephala bivoltina | True Bug |
| Draeculacephala borealis | True Bug |
| Draeculacephala crassicornis | True Bug |
| Draeculacephala manitobiana | True Bug |
| Draeculacephala noveboracensis | True Bug |
| Draeculacephala prasina | True Bug |
| Draeculacephala robinsoni | True Bug |
| Drapetisca alteranda | Sheetweb Spider |
| Drassodes neglectus | Ground Spider |
| Drassodes saccatus | Ground Spider |
| Drassyllus depressus | Ground Spider |
| Drassyllus dromeus | Ground Spider |
| Drassyllus insularis | Ground Spider |
| Drassyllus lamprus | Ground Spider |
| Drassyllus niger | Ground Spider |
| Drassyllus saphes | Ground Spider |
| Drasteria hastingsii | Cutworm Moth |
| Drasteria howlandii | Cutworm Moth |
| Drasteria ochracea | Cutworm Moth |
| Drasteria pallescens | Moth |
| Drasterius debilis | Click Beetle |
| Drastophus laevicollis | Ant-Like Stone Beetle |
| Drepanidotaenia philactes | Parasite |
| Drepanosiphum platanoidis | True Bug |
| Drepanulatrix monicaria | Moth |
| Drepanulatrix quadraria | Moth |
| Dromaeolus basalis | False Click Beetle |
| Dromaeolus californicus | False Click Beetle |
| Dromaeolus nitens | False Click Beetle |
| Dropephylla longula | Ocellate Rove Beetle |
| Drosophila suzukii | spotted-wing drosophila fly |
| Drunella flavilinea | Mayfly |
| Drunella grandis | Mayfly |
| Drunella pelosa | Mayfly |
| Drunella spinifera | Mayfly |
| Dryocoetes affaber | Palm Seed Borer |
| Dryocoetes autographus | Palm Seed Borer |
| Dryocoetes betulae | Palm Seed Borer |
| Dryocoetes caryi | Bark And Ambrosia Beetle |
| Dryocoetes confusus | Western Balsam Bark Beetle |
| Dryocoetes sechelti | Bark And Ambrosia Beetle |
| Dryophthorus americanus | Cactus Weevil |
| Dufouriellus ater | True Bug |
| Dulichia rhabdoplastis | Amphipod |
| Duthiersia expansa | Parasite |
| Dynamene tuberculosa | Isopod |
| Dynamenella sheareri | Isopod |
| Dynaspidiotus britannicus | True Bug |
| Dyopedos bispinus | Amphipod |
| Dysaphis plantaginea | True Bug |
| Dysaphis pyri | True Bug |
| Dysaphis sorbi | True Bug |
| Dyschirius aeneolus | Ground Beetle |
| Dyschirius alticola | Round Sand Beetle |
| Dyschirius aratus | Ground Beetle |
| Dyschirius compactus | Ground Beetle |
| Dyschirius dejeanii | Round Sand Beetle |
| Dyschirius frigidus | Ground Beetle |
| Dyschirius globosus | Round Sand Beetle |
| Dyschirius globulosus | Round Sand Beetle |
| Dyschirius hiemalis | Ground Beetle |
| Dyschirius laevifasciatus | Ground Beetle |
| Dyschirius longulus | Ground Beetle |
| Dyschirius montanus | Ground Beetle |
| Dyschirius pacificus | Ground Beetle |
| Dyschirius politus | Round Sand Beetle |
| Dyschirius politus politus | Beetle |
| Dyschirius setosus | Ground Beetle |
| Dyschirius sphaericollis | Ground Beetle |
| Dyschirius truncatus | Ground Beetle |
| Dysidea fragilis | Sponge |
| Dyslobus alternatus | Broad-nosed Weevil |
| Dyslobus bakeri | Broad-nosed Weevil |
| Dyslobus decoratus | Pine Needle Weevil |
| Dyslobus granicollis | Pine Needle Weevil |
| Dyslobus lecontei | Pine Needle Weevil |
| Dyslobus luteus | Broad-nosed Weevil |
| Dyslobus nigrescens | Broad-nosed Weevil |
| Dyslobus ursinus | Pine Needle Weevil |
| Dyslobus verrucifer | Pine Needle Weevil |
| Dysmicohermes disjunctus | Fishfly |
| Dysstroma colvillei | Moth |
| Dysstroma formosa | Formosa Carpet Moth |
| Dysstroma hersiliata | Orange-barred Carpet Moth |
| Dysstroma infuscata | Moth |
| Dysstroma mancipata | Moth |
| Dysstroma ochrofuscaria | Moth |
| Dysstroma pseudimmanata | Moth |
| Dysstroma suspectata | Moth |
| Dytiscus circumcinctus | Predaceous Diving Beetle |
| Dytiscus dauricus | Predaceous Diving Beetle |
| Dytiscus fasciventris | Predacious Diving Beetle |
| Dytiscus marginicollis | Predacious Diving Beetle |
| Eana georgiella | Moth |
| Eana idahoensis | Moth |
| Eana osseana | Moth |
| Eanus albertanus | Glowing Click Beetle |
| Eanus decoratus | Glowing Click Beetle |
| Eanus estriatus | Glowing Click Beetle |
| Eanus granicollis | Glowing Click Beetle |
| Eanus striatipennis | Glowing Click Beetle |
| Earota dentata | Rove Beetle |
| Ebo bucklei | Running Crab Spider |
| Ebo evansae | Spider |
| Ebo pepinensis | Running Crab Spider |
| Ecarinosphaerula ecarinata | Round Fungus Beetle |
| Ecclisocosmoecus scylla | Caddisfly |
| Ecclisomyia conspersa | Caddisfly |
| Ecclisomyia maculosa | Caddisfly |
| Echinococcus granulosus | Parasite |
| Echinocrepis rostrata | Deep Sea Urchin |
| Echinoparyphium recurvatum | Parasite |
| Echinorhynchus gadi | Parasite |
| Echinostoma revolutum | Parasite |
| Echinuria uncinata | Parasite |
| Ectoedemia canutus | Moth |
| Ectoedemia marmaropa | Moth |
| Ectoedemia minimella | Moth |
| Ectoedemia sericopeza | Moth |
| Ectopistes migratorius | Passenger Pigeon |
| Ectopleura marina | Solitary Pink-mouth Hydroid |
| Ectyomyxilla  parasitica | Sponge |
| Edotia sublittoralis | Isopod |
| Egira cognata | Cutworm Moth |
| Egira dolosa | Cutworm Moth |
| Ehlersia heterochaeta | Polychaete Worm |
| Eido trimaculella | Moth |
| Eimeria cotti | Parasite |
| Eimeria nishin | Parasite |
| Ekmania diomedeae | 15 Tentacled Ekmania Sea Cucumber |
| Elacatis lugubris | Narrow-Waisted Bark Beetle |
| Elachista amrodella | Moth |
| Elachista apina | Moth |
| Elachista aurocristata | Moth |
| Elachista cana | Moth |
| Elachista dagnirella | Moth |
| Elachista epimicta | Moth |
| Elachista hololeuca | Moth |
| Elachista lamina | Moth |
| Elachista morwenella | Moth |
| Elachista subalbidella | Moth |
| Elaphropus anthrax | Ground Beetle |
| Elaphropus incurvus | Round Sand Beetle |
| Elaphrus americanus sylvanus | Ground Beetle |
| Elaphrus californicus | Marsh Ground Beetle |
| Elaphrus clairvillei | Marsh Ground Beetle |
| Elaphrus lapponicus lapponicus | Ground Beetle |
| Elaphrus lecontei | Marsh Ground Beetle |
| Elaphrus olivaceus | Marsh Ground Beetle |
| Elasmopus antennatus | Amphipod |
| Elasmostethus interstinctus | True Bug |
| Elassodiscus caudatus | Blackbelly Snailfish |
| Elassoptes marinus | Minute Seed Weevil |
| Elathous californicus | Glowing Click Beetle |
| Elatobia carbonella | Moth |
| Elatobia montelliella | Moth |
| Elatobium abietinum | True Bug |
| Elatophilus pullus | True Bug |
| Elatotrypes hoferi | Elderberry Longhorn Beetle |
| Eleates depressus | Dune Beetle |
| Eleates explanatus | Darkling Beetle |
| Electra crustulenta arctica | Bryozoa |
| Eleodes constrictus | Darkling Beetle |
| Eleodes extricatus extricatus | Darkling Beetle |
| Eleodes granulatus | Darkling Beetle |
| Eleodes hispilabris connexus | Beetle |
| Eleodes hispilabris hispilabris | Darkling Beetle |
| Eleodes hispilabris immundus | Darkling Beetle |
| Eleodes humeralis | Desert Stink Beetle |
| Eleodes indentatus | Darkling Beetle |
| Eleodes nigrinus | Beetle |
| Eleodes nigrinus nigrinus | Darkling Beetle |
| Eleodes nigropilosus | Darkling Beetle |
| Eleodes novoverruculus | Darkling Beetle |
| Eleodes nunenmacheri nunenmacheri | Darkling Beetle |
| Eleodes obscurus sulcipennis | Darkling Beetle |
| Eleodes osculans | Darkling Beetle |
| Eleodes parvulus | Darkling Beetle |
| Eleodes pimelioides | Desert Stink Beetle |
| Eleodes productus | Darkling Beetle |
| Eleodes rotundipennis | Darkling Beetle |
| Eleodes tenebrosus | Darkling Beetle |
| Eleodes vandykei modificatus | Darkling Beetle |
| Ellabella editha | Moth |
| Elleschus ephippiatus | Snout Beetle |
| Ellescus ephippiatus | Nut and Acorn Weevil |
| Ellisina levata | Bryozoa |
| Ellychnia greeni | Diurnal Fireflie |
| Ellychnia lacustris | Firefly |
| Elodes angusta | Marsh Beetle |
| Elodes apicalis | Marsh Beetle |
| Elodes emarginata | Marsh Beetle |
| Elonium exsculptum | Rove Beetle |
| Elonium helferi | Rove Beetle |
| Elonium leechi | Rove Beetle |
| Elonium minutum | Rove Beetle |
| Elonium rugosum | Rove Beetle |
| Elophila obliteralis | Waterlily Leafcutter Moth |
| Elophila occidentalis | Moth |
| Elthusa californica | Parasitic Isopod |
| Elymana circius | True Bug |
| Elymana inornata | True Bug |
| Elymana pacifica | True Bug |
| Emblethis vicarius | True Bug |
| Emblyna annulipes | Meshweaver |
| Emblyna borealis | Spider |
| Emblyna chitina | Meshweaver |
| Emblyna completa | Meshweaver |
| Emblyna horta | Meshweaver |
| Emblyna manitoba | Meshweaver |
| Emblyna maxima | Meshweaver |
| Emblyna olympiana | Meshweaver |
| Emblyna oregona | Meshweaver |
| Emblyna peragrata | Meshweaver |
| Emblyna phylax | Meshweaver |
| Emblyna reticulata | Meshweaver |
| Emblyna sublata | Meshweaver |
| Emmesa stacesmithi | False Darkling Beetle |
| Emmesa testacea leeperi | False Darkling Beetle |
| Empelus brunnipennis | Rove Beetle |
| Emphyastes fucicola | one |
| Emphyastes fuscicola | Weevil |
| Empicoris culiciformis | True Bug |
| Empicoris errabundus | True Bug |
| Empicoris orthoneuron | True Bug |
| Empicoris pilosus | True Bug |
| Empicoris rubromaculatus | True Bug |
| Empicoris vagabundus | True Bug |
| Empidonax occidentalis | Cordilleran Flycatcher |
| Emplectonema purpuratum | Ribbon Worm |
| Empoasca abbreviata | True Bug |
| Empoasca abrupta | True Bug |
| Empoasca alboneura | True Bug |
| Empoasca alexanderae | True Bug |
| Empoasca andresia | True Bug |
| Empoasca aspersa | True Bug |
| Empoasca aureoviridis | True Bug |
| Empoasca banksianae | True Bug |
| Empoasca biarca | True Bug |
| Empoasca caesarsi | True Bug |
| Empoasca carsona | True Bug |
| Empoasca caverna | True Bug |
| Empoasca clinata | True Bug |
| Empoasca clypeata | True Bug |
| Empoasca columbiana | True Bug |
| Empoasca convergens | True Bug |
| Empoasca copula | True Bug |
| Empoasca coronata | True Bug |
| Empoasca crystola | True Bug |
| Empoasca curvata | True Bug |
| Empoasca curvatura | True Bug |
| Empoasca deluda | True Bug |
| Empoasca digita | True Bug |
| Empoasca dissimilaris | True Bug |
| Empoasca ditata | True Bug |
| Empoasca elongella | True Bug |
| Empoasca empusa | True Bug |
| Empoasca ensiformis | True Bug |
| Empoasca erigeron | True Bug |
| Empoasca esuma | True Bug |
| Empoasca exiguae | True Bug |
| Empoasca fabae | True Bug |
| Empoasca filamenta | True Bug |
| Empoasca flavescens | True Bug |
| Empoasca fontana | True Bug |
| Empoasca gelbata | True Bug |
| Empoasca hartzelli | True Bug |
| Empoasca incida | True Bug |
| Empoasca junipera | True Bug |
| Empoasca livingstonii | True Bug |
| Empoasca lucidae | True Bug |
| Empoasca luda | True Bug |
| Empoasca neaspersa | True Bug |
| Empoasca nigra | True Bug |
| Empoasca nigroscuta | True Bug |
| Empoasca panda | True Bug |
| Empoasca patula | True Bug |
| Empoasca pelecana | True Bug |
| Empoasca petiolaridis | True Bug |
| Empoasca pinella | True Bug |
| Empoasca portola | True Bug |
| Empoasca pura | True Bug |
| Empoasca ratio | True Bug |
| Empoasca recta | True Bug |
| Empoasca rossi | True Bug |
| Empoasca smaragdula | True Bug |
| Empoasca sordidula | True Bug |
| Empoasca tigris | True Bug |
| Empoasca tolana | True Bug |
| Empoasca trifasciata | True Bug |
| Empoasca typhlocyboides | True Bug |
| Empoasca vincula | True Bug |
| Empoasca yukonensis | True Bug |
| Enargia fausta | Moth |
| Encephalus americanus | Rove Beetle |
| Enchodes sericea | False Darkling Beetle |
| Enchrysa dissectella | Moth |
| Endeodes collaris | Soft-winged Flower Beetle |
| Endomychus limbatus | Handsome Fungus Beetle |
| Endothenia hebesana | Verbena Bud Moth |
| Endothenia nubilana | Moth |
| Enicmus cordatus | Minute Brown Scavenger Beetle |
| Enicmus fictus | Minute Brown Scavenger Beetle |
| Enicmus mimus | Minute Brown Scavenger Beetle |
| Enicmus tenuicornis | Minute Brown Scavenger Beetle |
| Ennearthron spenceri | Minute Tree-Fungus Beetle |
| Ennucula linki | Clam |
| Enochrus diffusus | Minute Mud-loving Beetle |
| Enochrus ochraceus | Minute Mud-loving Beetle |
| Enochrus piceus piceus | Water Scavenger Beetle |
| Enoclerus barri | Checkeredbeetle |
| Enoclerus eximius | Checkered Beetle |
| Enoclerus laetus | Checkered Beetle |
| Enoclerus lecontei | Checkered Beetle |
| Enoclerus schaefferi | Checkered Beetle |
| Enoplognatha intrepida | Cobweb Weaver |
| Enoplognatha latimana | Cobweb Weaver |
| Enoplognatha marmorata | Marbled Cobweb Spider |
| Enoplognatha thoracica | Cobweb Weaver |
| Enoplognatha wyuta | Cobweb Weaver |
| Entalophora capitata | Bryozoa |
| Entalophora clavata | Bryozoa |
| Entalophora vancouverensis | Bryozoa |
| Entelecara acuminata | Sheetweb Spider |
| Entelecara sombra | Sheetweb Spider |
| Entephria kidluitata | Moth |
| Entephria lagganata | Moth |
| Entephria takuata | Moth |
| Entobdella pugetensis | Parasite |
| Entomoscelis americana | Red Turnip Beetle |
| Entosphenus macrostomus | Cowichan Lake Lamprey |
| Enypia griseata | Mountain Girdle Moth |
| Eobrachycentrus gelidae | Caddisfly |
| Eobrolgus chumashi | Amphipod |
| Eocosmoecus frontalis | Caddisfly |
| Eocosmoecus schmidi | Caddisfly |
| Eogammarus confervicolus | Amphipod |
| Eogammarus oclairi | Amphipod |
| Eohaustorius brevicuspis | Amphipod |
| Eohaustorius eous | Amphipod |
| Eohaustorius estuarius | Amphipod |
| Eohaustorius sawyeri | Amphipod |
| Eohaustorius washingtonianus | Amphipod |
| Eomacrosiphon nigromaculosus | True Bug |
| Eoparargyractis floridalis | Moth |
| Eopsetta jordani | Petrale Sole |
| Eosymytes minutus | Amphipod |
| Epargyreus clarus californicus | Silver-Spotted Skipper |
| Epeorus dulciana | Mayfly |
| Epeorus grandis | Mayfly |
| Epeorus permagnus | Mayfly |
| Epermenia albapunctella | Moth |
| Epermenia cicutaella | Moth |
| Ephemera simulans | Mayfly |
| Ephestia elutella | Tobacco Moth |
| Ephestia kuehniella | Mediterranean Flour Moth |
| Ephestiodes erythrella | Moth |
| Ephestiodes gilvescentella | Moth |
| Ephestiodes griseus | Moth |
| Ephistemus globulus | Silken Fungus Beetle |
| Epiactis fernaldi | Fernald Brooding Anemone |
| Epiactis ritteri | Ritter's Brooding Anemone |
| Epiblema brightonana | Brighton's Epiblema |
| Epiblema hirsutana | Moth |
| Epiblema periculosana | Moth |
| Epiblema radicana | Moth |
| Epiblema resumptana | Moth |
| Epicauta immerita | Blister Beetle |
| Epicauta normalis | Oil Beetle |
| Epicauta oregona | Blister Beetle |
| Epicauta piceiventris | Blister Beetle |
| Epicauta pruinosa | Oil Beetle |
| Epicauta subglabra | Oil Beetle |
| Epidiopatra hupferiana monroi | Polychaete Worm |
| Epilampra maya maya | Maya Cockroach |
| Epimartyria auricrinella | Goldcap Moss-eater |
| Epimartyria bimaculella | Moth |
| Epinotia albangulana | Moth |
| Epinotia albicapitana | Moth |
| Epinotia arctostaphylana | Moth |
| Epinotia biangulana | Moth |
| Epinotia bigemina | Moth |
| Epinotia castaneana | Moth |
| Epinotia cinereana | Moth |
| Epinotia columbia | Moth |
| Epinotia cruciana | Willow Tortrix |
| Epinotia digitana | Moth |
| Epinotia hopkinsana | Moth |
| Epinotia kasloana | Moth |
| Epinotia madderana | White Lace Epinotia |
| Epinotia medioplagata | Moth |
| Epinotia meritana | White Fir Needleminer |
| Epinotia miscana | Moth |
| Epinotia momonana | Moth |
| Epinotia nanana | European Spruce Needleminer |
| Epinotia nigralbana | Moth |
| Epinotia nisella | Poplar Branchlet Borer |
| Epinotia normanana | Moth |
| Epinotia pulsatillana | Moth |
| Epinotia rectiplicana | Moth |
| Epinotia sagittana | Moth |
| Epinotia salicicolana | Moth |
| Epinotia seorsa | Moth |
| Epinotia signiferana | Moth |
| Epinotia silvertoniensis | Moth |
| Epinotia solicitana | Birch Shoot Borer |
| Epinotia subplicana | Moth |
| Epinotia terracoctana | Moth |
| Epinotia transmissana | Walker's Epinotia |
| Epinotia trigonella | Birch Epinotia |
| Epinotia trossulana | Moth |
| Epinotia tsugana | Hemlock Needleminer |
| Epinotia vagana | Moth |
| Epiphanis cornutus | False Click Beetle |
| Epiptera brittoni | True Bug |
| Epiptera confusa | True Bug |
| Epiptera fusiformis | True Bug |
| Epiptera henshawi | True Bug |
| Epiptera manitobiana | True Bug |
| Epiptera pallida | True Bug |
| Epiptera septentrionalis | True Bug |
| Epiptera slossonae | True Bug |
| Epirrhoe sperryi | Moth |
| Epirrita pulchraria | Moth |
| Epirrita undulata | Moth |
| Episernus trapezoideus | Puffball Beetle |
| Episimus argutanus | Moth |
| Epitonium crebricostatum | Brown Hive |
| Epitrix subcrinita | Western Potato Flea Beetle |
| Epitrix tuberis | Tuber Flea Beetle |
| Epizoanthus induratum | Luminescent Zoanthid |
| Epizoanthus leptoderma | Elongate Zoanthid |
| Epomidiostomum anatinum | Parasite |
| Epomidiostomum crami | Parasite |
| Epuraea adumbrata | Sap-Feeding Beetle |
| Epuraea alternans | Sap-Feeding Beetle |
| Epuraea ambigua | Sap-Feeding Beetle |
| Epuraea avara | Sap-feeding Beetle |
| Epuraea boreades | Sap-Feeding Beetle |
| Epuraea erichsoni | Sap-Feeding Beetle |
| Epuraea helvola | Sap-feeding Beetle |
| Epuraea labilis | Sap-Feeding Beetle |
| Epuraea linearis | Sap-feeding Beetle |
| Epuraea monogama | Sap-feeding Beetle |
| Epuraea obliqua | Sap Beetle |
| Epuraea obliquus | Sap-Feeding Beetle |
| Epuraea obtusicollis | Sap-feeding Beetle |
| Epuraea ovata | Sap-Feeding Beetle |
| Epuraea pallescens labilis | Beetle |
| Epuraea parsonsi | Sap-Feeding Beetle |
| Epuraea placida | Sap Beetle |
| Epuraea planulata | Sap-feeding Beetle |
| Epuraea populi | Sap-feeding Beetle |
| Epuraea rufomarginata | Sap Beetle |
| Epuraea truncatella | Sap-feeding Beetle |
| Erebia epipsodea sineocellata | Common Alpine |
| Erebia fasciata fasciata | Banded Alpine |
| Erebia mackinleyensis mackinleyensis | Mt. Mckinley Alpine |
| Erebia magdalena | Magdalena Alpine |
| Erebia magdalena saxicola | Magdalena Alpine |
| Erebia pawlowskii alaskensis | Mountain Alpine |
| Erebia rossii rossii | Ross' Alpine |
| Erebia youngi youngi | Young's Alpine |
| Eremicaster crassus | Deep Sea Mud Star |
| Eremicaster pacificus | Deep Sea Mud Star |
| Eremobates docolora | Sun Scorpion |
| Eremobates gladiolus | Sun Scorpion |
| Eremobates scaber | Sun Scorpion |
| Eremochrysa canadensis | Lacewing |
| Eremochrysa fraterna | Lacewing |
| Eremochrysa punctinervis | Lacewing |
| Eremocoris borealis | True Bug |
| Eremocoris canadensis | True Bug |
| Eremocoris ferus | True Bug |
| Eremocoris melanotus | True Bug |
| Eremocoris obscurus | True Bug |
| Ergasilus auritus | Parasite |
| Ergasilus nerkae | Parasite |
| Ergasilus turgidus | Parasite |
| Ergodesmus compactus | Millipede |
| Ericaphis fimbriata | Aphid |
| Ericaphis gentneri | Aphid |
| Ericaphis scammelli | Aphid |
| Ericaphis siphunculata | Aphid |
| Erichsonius nanus | Rove Beetle |
| Erichsonius pusio | Rove Beetle |
| Erigone aletris | Sheetweb Spider |
| Erigone alsaida | Sheetweb Spider |
| Erigone arcticola | Spider |
| Erigone arctophylacis | Sheetweb Spider |
| Erigone atra | Sheetweb Spider |
| Erigone blaesa | Sheetweb Spider |
| Erigone cristatopalpus | Sheetweb Spider |
| Erigone dentigera | Sheetweb Spider |
| Erigone dentosa | Sheetweb Spider |
| Erigone paradisicola | Sheetweb Spider |
| Erigone psychrophila | Sheetweb Spider |
| Erigonoploides sp. | Sheetweb Spider |
| Eriocampa ovata | Alder Sawfly |
| Eriosoma americanum | True Bug |
| Eriosoma crataegi | True Bug |
| Eriosoma grossulariae | True Bug |
| Eriosoma lanigerum | True Bug |
| Eriosoma pyricola | True Bug |
| Eriosoma rileyi | True Bug |
| Erirhinus aethiops | Snout Beetle |
| Ernobius gentilis | Deathwatch Beetle |
| Ernobius nigrans | Deathwatch Beetle |
| Ernobius pallitarsis | Deathwatch Beetle |
| Ero canionis | Mecicobothriid Spider |
| Ero tuberculata | Mecicobothriid Spider |
| Eronyxa pallida | Checkered Beetle |
| Erpocotyle squali | Parasite |
| Errano lagunae | Polychaete Worm |
| Errhomus calvus | True Bug |
| Errinopora poutalesii | Hydrocoral |
| Erynephala puncticollis | Purple Loosestrife Beetle |
| Erythroneura acicularis | True Bug |
| Erythroneura aspera | True Bug |
| Erythroneura bigemina | True Bug |
| Erythroneura comes | True Bug |
| Erythroneura complicata | True Bug |
| Erythroneura corni | True Bug |
| Erythroneura dolosa | True Bug |
| Erythroneura electa | True Bug |
| Erythroneura elegantula | True Bug |
| Erythroneura ontari | True Bug |
| Erythroneura rosa | True Bug |
| Erythroneura rubrella | True Bug |
| Erythroneura septima | True Bug |
| Erythroneura tacita | True Bug |
| Erythroneura vitifex | True Bug |
| Erythroneura ziczac | True Bug |
| Essigella californica | True Bug |
| Essigella fusca | True Bug |
| Essigella knowltoni | True Bug |
| Essigella wilsoni | True Bug |
| Estrandia grandaeva | Sheetweb Spider |
| Etainia seriocopeza | Moth |
| Eteobalea intermediella | Moth |
| Eteobalea serratella | Moth |
| Eteone longa | Polychaete Worm |
| Eteone spetsbergensis | Polychaete Worm |
| Ethmia albistrigella | Moth |
| Ethmia coquillettella | Moth |
| Ethmia marmorea | Moth |
| Ethmia monticola | Gray Ethmia |
| Ethobuella tuonops | Hahniid Spider |
| Ethopolys californicus | Centipede |
| Ethopolys spectans | Centipede |
| Etiella zinckenella | Gold-banded Etiella |
| Euaesthetus pacificus | Rove Beetle |
| Euaesthetus pugetensis | Rove Beetle |
| Eualus avinus | Beaked Eualid |
| Eualus biunguis | Deapsea Eualid |
| Eualus macrophthalmus | Bigeye Eualid |
| Eualus subtilis | Pygmy Eualid |
| Eualus townsendi | Townsend’s Eualid |
| Euborellia annulipes | Ring-Legged Earwig |
| Eubothrium oncorhynchi | Parasite |
| Eubothrium salvelini | Parasite |
| Eubothrium tulipai | Parasite |
| Eubranchus ruprium | Olive-Green Aeolid |
| Eubranchus rustyus | Rustya Aeolis |
| Eubranchus sanjuanensis | San Juan Aeolid |
| Eubrychius velatus | Snout Beetle |
| Eucallipterus tiliae | True Bug |
| Eucapnopsis brevicauda | Stonefly |
| Euceraphis betulae | True Bug |
| Euceraphis gillettei | True Bug |
| Euceraphis papyrifericola | True Bug |
| Euceraphis punctipennis | True Bug |
| Euceratia securella | Moth |
| Euchalcia borealis | Moth |
| Euchlaena marginaria | Ochre Euchlaena |
| Euchlaena mollisaria | Moth |
| Euchloe ausonides insulanus | Large Marble |
| Euchone analis | Polychaete Worm |
| Euchone hancocki | Polychaete Worm |
| Euchone incolor | Polychaete Worm |
| Eucinetus haemorrhoidalis | Plate-thigh Beetle |
| Eucinetus infumatus | Plate-Thigh Beetle |
| Eucinetus punctulatus | Plate-Thigh Beetle |
| Eucinetus terminalis | Plate-Thigh Beetle |
| Eucinetus testaceus | Plate-Thigh Beetle |
| Eucirroedia pampina | Cutworm Moth |
| Euclymene reticulata | Polychaete Worm |
| Euclymene zonalis | Polychaete Worm |
| Eucnecosum brunnescens | Ocellate Rove Beetle |
| Eucnecosum tenue | Rove Beetle |
| Euconnus longiceps | Ant-Like Stone Beetle |
| Euconulus fulvus | Brown Hive |
| Euconulus praticola | Marsh Hive |
| Eucopina bobana | Moth |
| Eucopina ponderosa | Moth |
| Eucopina rescissoriana | Lodgepole Pinecone Borer |
| Eucopina siskiyouana | Fir Cone Borer |
| Eucopina sonomana | Western Pine Shoot Borer |
| Eucosma alatana | Moth |
| Eucosma altana | Moth |
| Eucosma apacheana | Moth |
| Eucosma artemisiana | Moth |
| Eucosma awemeana | Moth |
| Eucosma camdenana | Moth |
| Eucosma columbiana | Moth |
| Eucosma complicana | Moth |
| Eucosma corculana | Moth |
| Eucosma crassana | Moth |
| Eucosma dorsiatomana | Moth |
| Eucosma elongana | Moth |
| Eucosma fasciculatana | Moth |
| Eucosma fertoriana | Moth |
| Eucosma formosana | Beautiful Phaneta Moth |
| Eucosma griseocapitana | Moth |
| Eucosma implicata | Moth |
| Eucosma indagatricana | Moth |
| Eucosma indeterminana | Moth |
| Eucosma influana | Moth |
| Eucosma insignata | Moth |
| Eucosma kiscana | Moth |
| Eucosma lapidana | Moth |
| Eucosma latens | Moth |
| Eucosma marmontana | Moth |
| Eucosma misturana | Moth |
| Eucosma modernana | Moth |
| Eucosma montanana | Moth |
| Eucosma nepotinana | Moth |
| Eucosma occidentalis | Moth |
| Eucosma octopunctana | Moth |
| Eucosma oregonensis | Moth |
| Eucosma pallidarcis | Moth |
| Eucosma pallidicostana | Moth |
| Eucosma parmatana | Moth |
| Eucosma perangustana | Moth |
| Eucosma rupestrana | Moth |
| Eucosma setonana | Moth |
| Eucosma striatana | Striated Phaneta Moth |
| Eucosma tarandana | Moth |
| Eucosma transversa | Moth |
| Eucosma umbrastriana | Moth |
| Eucosma verna | Speckled Phaneta Moth |
| Eucosma youngi | Moth |
| Eucrada robusta | Deathwatch Beetle |
| Eucratea loricata | Bryozoa |
| Eucypris virens | Seed Shrimp |
| Eudactylina acanthii | Parasite |
| Eudeilinia herminiata | Northern Eudeilinea Moth |
| Eudonia albertalis | Moth |
| Eudonia alpina | Moth |
| Eudonia commortalis | Moth |
| Eudonia expallidalis | Moth |
| Eudonia spaldingalis | Moth |
| Eudonia vivida | Moth |
| Eufidonia convergaria | Moth |
| Eufidonia discospilata | Sharp-lined Powder Moth |
| Eugenes fulgens | Rivoli's Hummingbird |
| Euglyptoneura fuscipennis | True Bug |
| Euglyptoneura robusta | True Bug |
| Euhrychiopsis albertana | Snout Beetle |
| Euhrychiopsis lecontei | Milfoil Weevil |
| Euhyponomeutoides gracilariella | Moth |
| Euides gerhardi | True Bug |
| Eulachnus brevipilosus | True Bug |
| Eulachnus rileyi | True Bug |
| Eulaira arctoa | Spider |
| Eulaira chelata | Spider |
| Eulaira dela | Sheetweb Spider |
| Eulaira obscura | Sheetweb Spider |
| Eulaira simplex | Sheetweb Spider |
| Eulalia bilineata | Polychaete Worm |
| Eulalia macroceros | Polychaete Worm |
| Eulalia nigrimaculata | Polychaete Worm |
| Eulalia sanguinea | Polychaete Worm |
| Eulalia viridis | Polychaete Worm |
| Eulecanium tiliae | True Bug |
| Eulithidium luridum | Dark Pheasant |
| Eulithis destinata | Moth |
| Eulithis explanata | White Eulithis |
| Eulithis flavibrunneata | Moth |
| Eumacaria madopata | Brown-bordered Geometer Moth |
| Eumysia maidella | Moth |
| Eunice aphroditois | Polychaete Worm |
| Eunice biannulata | Polychaete Worm |
| Eunice kobiensis | Polychaete Worm |
| Eunice valens | Polychaete Worm |
| Eunoe oerstedi | Polychaete Worm |
| Eunoe senta | Thorny Scaleworm |
| Euophrys monadnock | Jumping Spider |
| Euphoria inda | Bumble Flower Beetle |
| Euphrosine arctica | Polychaete Worm |
| Euphrosine bicirrata | Bristly-Ball Porcupine Worm |
| Euphrosine hortensis | Polychaete Worm |
| Euphrosine multibranchiata | Multi-Branched Porcupine Worm |
| Euphyes vestris vestris | Dun Skipper |
| Euphysa flammea | Jellyfish |
| Euphysa japonica | Jellyfish |
| Euphysa vervooti | Jellyfish |
| Eupisenus elongatus | Polypore Fungus Beetle |
| Eupithecia absinthiata | Moth |
| Eupithecia agnesata | Moth |
| Eupithecia albicapitata | Moth |
| Eupithecia annulata | Larch Pug Moth |
| Eupithecia anticaria | Moth |
| Eupithecia assimilata | Moth |
| Eupithecia behrensata | Moth |
| Eupithecia borealis | Moth |
| Eupithecia bryanti | Moth |
| Eupithecia casloata | Moth |
| Eupithecia columbiata | Moth |
| Eupithecia columbrata | Moth |
| Eupithecia gelidata | Moth |
| Eupithecia harrisonata | Moth |
| Eupithecia interruptofasciata | Juniper Looper Moth |
| Eupithecia intricata | Moth |
| Eupithecia johnstoni | Moth |
| Eupithecia lafontaineata | Moth |
| Eupithecia maestosa | Moth |
| Eupithecia misturata | Moth |
| Eupithecia multistrigata | Moth |
| Eupithecia mutata | Spruce Cone Looper Moth |
| Eupithecia nimbicolor | Moth |
| Eupithecia niphadophilata | Moth |
| Eupithecia niveifascia | Moth |
| Eupithecia ornata | Moth |
| Eupithecia palpata | Small Pine Looper Moth |
| Eupithecia perfusca | Moth |
| Eupithecia placidata | Moth |
| Eupithecia pseudotsugata | Moth |
| Eupithecia pusillata | Moth |
| Eupithecia pygmaeata | Moth |
| Eupithecia regina | Moth |
| Eupithecia rotundopuncta | Moth |
| Eupithecia satyrata | Moth |
| Eupithecia sharronata | Moth |
| Eupithecia subapicata | Moth |
| Eupithecia subcolorata | Moth |
| Eupithecia tenuata | Moth |
| Euplectus idahoensis | Rove Beetle |
| Euplectus karstenii | Ant-loving Beetle |
| Euplokamis dunlapae | Jellyfish |
| Eupsilia devia | Cutworm Moth |
| Eupsilia fringata | Cutworm Moth |
| Eupteryx furcata | True Bug |
| Eupteryx melissae | True Bug |
| Eurema nicippe | Sleepy Orange |
| Eurhinosea flavaria | Moth |
| Europiella artemisiae | True Bug |
| Europiella consors | True Bug |
| Europiella decolor | True Bug |
| Europiella pilosula | True Bug |
| Eurychilopterella pacifica | True Bug |
| Euryderus grossus | False Bombardier Beetle |
| Eurygaster alternata | True Bug |
| Eurygaster amerinda | True Bug |
| Eurylepta californica | Striped Polyclad Flatworm |
| Eurylophella lodi | Mayfly |
| Eurymycter fasciatus | Fungus weevil |
| Euryopis argentea | Cobweb Weaver |
| Euryopis formosa | Cobweb Weaver |
| Euryopis funebris | Cobweb Weaver |
| Euryopis scriptipes | Cobweb Weaver |
| Eurysa magnifrons | True Bug |
| Eurysa obesa | True Bug |
| Eurytemora affinis | Copepod |
| Eurythmia angulella | Moth |
| Eurythmia spaldingella | Moth |
| Euscelis aemulans | True Bug |
| Euscelis alpina | True Bug |
| Euscelis confinis | True Bug |
| Euscelis maculipennis | True Bug |
| Euscelis obsoleta | True Bug |
| Euscelis okaensis | True Bug |
| Euscelis relativa | True Bug |
| Euscelis sordida | True Bug |
| Eusirella multicalceola | Amphipod |
| Eusirus columbianus | Amphipod |
| Eusphalerum californicum | Rove Beetle |
| Eusphalerum farrarae | Rove Beetle |
| Eusphalerum fenyesi | Ocellate Rove Beetle |
| Eusphalerum grayae | Rove Beetle |
| Eusphalerum pothos | Ocellate Rove Beetle |
| Eusphalerum swauki | Ocellate Rove Beetle |
| Euspilotus cribrum | Clown Beetle |
| Euspilotus insertus | Clown Beetle |
| Euspilotus obductus | Clown Beetle |
| Euspilotus scissus | Clown Beetle |
| Euspilotus scrupularis | Clown Beetle |
| Euspira draconis | Drake's Moon Snail |
| Eustictus necopinus | True Bug |
| Eustrongylides tubifex | Parasite |
| Eustrophinus confinis | False Darkling Beetle |
| Eustrophopsis confinis | Polypore Fungus Beetle |
| Eusyllis assimilis | Polychaete Worm |
| Eusyllis blomstrandi | Polychaete Worm |
| Eusyllis magnifica | Polychaete Worm |
| Eutettix glennanus | True Bug |
| Eutheia morae | Ant-Like Stone Beetle |
| Euthyatira lorata | Moth |
| Eutrichapion cavifrons | Straight-snouted Weevil |
| Eutrichapion viciae | Pear-shaped Weevil |
| Euvacusus coloradanus | pseudo |
| Euxoa aberrans | Cutworm Moth |
| Euxoa adumbrata | Cutworm Moth |
| Euxoa aequalis | Cutworm Moth |
| Euxoa agema | Cutworm Moth |
| Euxoa albipennis | Cutworm Moth |
| Euxoa altens | Cutworm Moth |
| Euxoa apopsis | Moth |
| Euxoa atomaris | Cutworm Moth |
| Euxoa auripennis | Cutworm Moth |
| Euxoa basalis | Moth |
| Euxoa bicollaris | Cutworm Moth |
| Euxoa biformata | Cutworm Moth |
| Euxoa brunneigera | Cutworm Moth |
| Euxoa campestris | Cutworm Moth |
| Euxoa castanea | Cutworm Moth |
| Euxoa catenula | Cutworm Moth |
| Euxoa choris | Cutworm Moth |
| Euxoa costata | Cutworm Moth |
| Euxoa dargo | Cutworm Moth |
| Euxoa divergens | Cutworm Moth |
| Euxoa edictalis | Cutworm Moth |
| Euxoa excogita | Cutworm Moth |
| Euxoa extranea | Cutworm Moth |
| Euxoa flavicollis | Cutworm Moth |
| Euxoa furtivus | Cutworm Moth |
| Euxoa idahoensis | Cutworm Moth |
| Euxoa infracta | Cutworm Moth |
| Euxoa intermontana | Cutworm Moth |
| Euxoa laetificans | Cutworm Moth |
| Euxoa lewisi | Cutworm Moth |
| Euxoa lillooet | Cutworm Moth |
| Euxoa macleani | Moth |
| Euxoa macrodentata | Cutworm Moth |
| Euxoa maimes | Cutworm Moth |
| Euxoa medialis | Median-banded Dart |
| Euxoa mimallonis | Cutworm Moth |
| Euxoa mitis | Cutworm Moth |
| Euxoa munis | Cutworm Moth |
| Euxoa murdocki | Cutworm Moth |
| Euxoa nevada | Cutworm Moth |
| Euxoa nomas | Cutworm Moth |
| Euxoa nostra | Cutworm Moth |
| Euxoa oblongistigma | Cutworm Moth |
| Euxoa occidentalis | Cutworm Moth |
| Euxoa olivalis | Cutworm Moth |
| Euxoa pallidimacula | Cutworm Moth |
| Euxoa pallipennis | Cutworm Moth |
| Euxoa perexcellens | Cutworm Moth |
| Euxoa perolivalis | Cutworm Moth |
| Euxoa perpolita | Cutworm Moth |
| Euxoa pestula | Cutworm Moth |
| Euxoa plagigera | Cutworm Moth |
| Euxoa pleuritica | Cutworm Moth |
| Euxoa pluralis | Cutworm Moth |
| Euxoa punctigera | Cutworm Moth |
| Euxoa quadridentata | Cutworm Moth |
| Euxoa ridingsiana | Cutworm Moth |
| Euxoa rockburnei | Cutworm Moth |
| Euxoa rufula | Cutworm Moth |
| Euxoa scotogrammoides | Cutworm Moth |
| Euxoa septentrionalis | Cutworm Moth |
| Euxoa servitus | Cutworm Moth |
| Euxoa setonia | Cutworm Moth |
| Euxoa shasta | Cutworm Moth |
| Euxoa silens | Cutworm Moth |
| Euxoa simona | Cutworm Moth |
| Euxoa simulata | Cutworm Moth |
| Euxoa subandera | Cutworm Moth |
| Euxoa taura | Moth |
| Euxoa terrenus | Cutworm Moth |
| Euxoa tessellata | Cutworm Moth |
| Euxoa tronellus | Moth |
| Euxoa vallus | Cutworm Moth |
| Euxoa velleripennis | Fleece-winged Dart |
| Euxoa westermanni | Cutworm Moth |
| Euzonus mucronata | Sword Utility-Worm |
| Euzonus williamsi | Polychaete Worm |
| Euzophera habrella | Moth |
| Euzophera semifuneralis | American Plum Borer |
| Euzophera vinnulella | Moth |
| Evacanthus emilus | True Bug |
| Evacanthus grandipes | True Bug |
| Evacanthus orbitalis | True Bug |
| Evarcha proszynskii | Jumping Spider |
| Evergestis palousalis | Moth |
| Evergestis simulatilis | Moth |
| Evergestis vinctalis | Moth |
| Evotus naso | White-fringed Weevil |
| Exaeretia canella | Moth |
| Exaeretia fulva | Moth |
| Exaeretia nivalis | Moth |
| Exaeretia sordidella | Moth |
| Exaeretia umbraticostella | Moth |
| Exaireta spinigera | Garden Soldier Fly |
| Exapion fuscirostre fuscirostre | Beetle |
| Excirolana chiltoni | Isopod |
| Exilioidea rectirostris | Sea Snail |
| Exitianus exitiosus | True Bug |
| Exochomus californicus | Twice-stabbed Lady Beetle |
| Exogone dwisula | Polychaete Worm |
| Exogone gemmifera | Polychaete Worm |
| Exogone lourei | Polychaete Worm |
| Exogone verugera | Polychaete Worm |
| Exosphaeroma amplicauda | Broad-Tailed Isopod |
| Exoteleia dodecella | Pine Bud Moth |
| Exoteleia pinifoliella | Pine Needleminer |
| Eyakia robusta | Amphipod |
| Fabogethes nigrescens | Sap Beetle |
| Fabricia oregonica | Polychaete Worm |
| Fabricia sabella | Polychaete Worm |
| Fabricola berkeleyi | Polychaete Worm |
| Fagocyba douglasi | True Bug |
| Falagria dissecta | Rove Beetle |
| Falco tinnunculus | Eurasian Kestrel |
| Fallapion finitimum | Pear-shaped Weevil |
| Fallapion pennsylvanicum | Straight-snouted Weevil |
| Farrea occa | Sponge |
| Fasciola hepatica | Parasite |
| Fascioloides magna | Parasite |
| Fellodistomum sebastodis | Parasite |
| Feltia nigrita | Moth |
| Fenestrulina malusi | Bryozoa |
| Fenestrulina malusi umbonata | Bryozoa |
| Feralia jocosa | Cutworm Moth |
| Ferrissia fragilis | Fragile Ancylid |
| Fieberiella florii | True Bug |
| Fieberocapsus flaveolus | True Bug |
| Filatima abactella | Moth |
| Filatima albicostella | Moth |
| Filatima aulaea | Moth |
| Filatima demissae | Moth |
| Filatima epulatrix | Moth |
| Filatima vaccinii | Moth |
| Filatima xanthuris | Moth |
| Filicrisia geniculata | Bryozoa |
| Filifascigera fasciculata | Bryozoa |
| Fimbriariella falciformis | Parasite |
| Fiona pinnata | Feather Aeolid |
| Fissidentalium megathyris | Tusk Shel |
| Fitchia spinosula | True Bug |
| Flabelligera affinis | Sheathed Bristle-Cage Worm |
| Flabellina amabilis | Charming Aeolid |
| Flabellina iodinea | Purple Aeolis |
| Flabellina islandica | Island Aeolid |
| Flabellina japonica | Japanese Aeolid |
| Flabellina pricei | Price's Aeolid |
| Flabellina trilineata | Three-line Aeolid |
| Flabellina verrucosa | Warty Rhinophore Aeolid |
| Flabellomicrosiphum knowltoni | True Bug |
| Fleutiauxellus extricatus | Extricated Click Beetle |
| Fleutiauxellus manki | ctenicera |
| Flexamia inflata | True Bug |
| Flexamia serrata | True Bug |
| Flosmaris grandis | White Burrowing Anemone |
| Foersteria purpurea | Jellyfish |
| Fomoria septembrella | Moth |
| Forcepia hartmani | Sponge |
| Forcipata acclina | True Bug |
| Forcipata loca | True Bug |
| Forcipata montana | True Bug |
| Forcipata sicula | True Bug |
| Forcipata triquetra | True Bug |
| Forda formicaria | True Bug |
| Forda marginata | True Bug |
| Formica accreta | Ant |
| Formica adamsi whymperi | Ant |
| Formica aerata | Ant |
| Formica curiosa | Ant |
| Formica dakotensis | Ant-wasp |
| Formica densiventris | Ant |
| Formica fusca | Common Black Ant |
| Formica hewitti | Ant |
| Formica integroides | Ant |
| Formica lasioides | Ant |
| Formica manni | Ant |
| Formica microgyna | Ant |
| Formica montana | Prairie Mound Ant |
| Formica neoclara | Ant |
| Formica neogagates | Ant |
| Formica obscuriventris | Ant |
| Formica obtusopilosa | Ant |
| Formica oreas | Ant |
| Formica pacifica | Ant |
| Formica planipilis | Ant |
| Formica podzolica | Ant |
| Formica propinqua | Ant |
| Formica spatulata | Ant |
| Formica subnitens | Ant |
| Formica subpolita | Ant |
| Formica transmontanis | Ant |
| Formica vinculans | Ant |
| Formica xerophila | Ant |
| Formicoxenus quebecensis | Guest Ant |
| Foxiphalus falciformis | Amphipod |
| Foxiphalus similis | Amphipod |
| Foxiphalus xiximeus | Amphipod |
| Fredericella indica | Bryozoa |
| Frederickus coylei | Spider |
| Frederickus wilburi | Spider |
| Frigartus frigidus | True Bug |
| Frisonia picticeps | Stonefly |
| Frontinella communis | Spider |
| Fucaria striata | Hydrothermal Vent Fucaria Snail |
| Fullawaya bulbosa | True Bug |
| Funiculina parkeri | Pennatulacean |
| Furcula cinerea | Prominent |
| Furcula modesta | Prominent |
| Furcula occidentalis | Prominent |
| Fusinus monksae | Shouldered Spindle |
| Gabrius appendiculatus | Rove Beetle |
| Gabrius bidentatus | Rove Beetle |
| Gabrius brevipennis | Large Rove Beetle |
| Gabrius cushmani | Rove Beetle |
| Gabrius decipiens | Rove Beetle |
| Gabrius downiei | Rove Beetle |
| Gabrius forcipatus | Rove Beetle |
| Gabrius hippisleyae | Rove Beetle |
| Gabrius laelaps | Rove Beetle |
| Gabrius linearis | Rove Beetle |
| Gabrius microphthalmus | Rove Beetle |
| Gabrius nigritulus | Rove Beetle |
| Gabrius oceanus | Rove Beetle |
| Gabrius picipennis | Large Rove Beetle |
| Gabrius punctatellus punctatellus | Beetle |
| Gabrius sallustius | Rove Beetle |
| Gabrius seattlensis | Rove Beetle |
| Gabrius shulli | Rove Beetle |
| Gabrius splendidulus | Large Rove Beetle |
| Gabrius subnigritulus | Rove Beetle |
| Gabrius virilis | Rove Beetle |
| Gabrius wawawai | Rove Beetle |
| Galactosomum phalacrocoracis | Parasite |
| Galathowenia oculata | Polychaete Worm |
| Galba dalli | Dusky Fossaria |
| Galba obrussa | Golden Fossaria |
| Galba parva | Pygmy Fossaria |
| Galba truncatula | Attenuate Fossaria |
| Galeorhinus galeus | Soupfin Shark |
| Galeruca browni | Peppergrass Beetle |
| Galgula partita | Cutworm Moth |
| Galgupha nitiduloides nitiduloides | True Bug |
| Galgupha ovalis | True Bug |
| Galiteuthis phyllura | Glass Squid |
| Galleria mellonella | Greater Wax Moth |
| Gammaropsis shoemakeri | Amphipod |
| Gammaropsis spinosa | Amphipod |
| Gammaropsis thompsoni | Amphipod |
| Gammarus setosus | Amphipod |
| Gargaphia opacula | True Bug |
| Gargaphia solani | True Bug |
| Gargara genistae | True Bug |
| Garveia annulata | Orange Hydroid |
| Gastrallus marginipennis | Death-watch Beetle |
| Gastrocopta holzingeri | Lambda Snaggletooth |
| Gastrodes intermedius | True Bug |
| Gastrodes pacificus | True Bug |
| Gastrophysa cyanea | Leaf Beetle |
| Gastrophysa cyanea caesia | Leaf Beetle |
| Gastropteron pacificum | Winged Sea Slug |
| Gastrotaenia cygni | Parasite |
| Gastrotaphrus barberi | one |
| Gattyana ciliata | Ciliated Scaleworm |
| Gattyana cirrosa | Polychaete Worm |
| Gazoryctra confusus | Moth |
| Gazoryctra hyperboreus | Moth |
| Gazoryctra novigannus | Moth |
| Gehringia olympica | Marsh Ground Beetle |
| Geina tenuidactylus | Plume Moth |
| Gelae parile | Small Carrion Beetle |
| Gelastocoris oculatus | True Bug |
| Gelechia dromicella | Moth |
| Gelechia lynceella | Moth |
| Gelechia mandella | Moth |
| Gelechia monella | Moth |
| Gelechia panella | Moth |
| Gelechia ribesella | Moth |
| Gelechia versutella | Moth |
| Genistogethes carinulatus | Pollen Beetle |
| Genolinea anura | Parasite |
| Genolinea laticauda | Parasite |
| Genyonemus lineatus | White Croaker |
| Geocoris atricolor | True Bug |
| Geocoris bullatus | True Bug |
| Geocoris discopterus | True Bug |
| Geocoris howardi | True Bug |
| Geocoris limbatus | True Bug |
| Geocoris lividipennis | True Bug |
| Geocoris pallens | True Bug |
| Geocoris punctipes | True Bug |
| Geodercodes latipennis | White-fringed Weevil |
| Geodinella robusta | Sponge |
| Geodromicus fauveli | Rove Beetle |
| Geodromicus integer | Rove Beetle |
| Geodromicus schultzi | Rove Beetle |
| Geodromicus temporalis | Rove Beetle |
| Geoica utricularia | True Bug |
| Geomackiea zephyrolata | Jellyfish |
| Geomysaprinus cheyennensis | Clown Beetle |
| Geomysaprinus copei | Clown Beetle |
| Geomysaprinus lanei | Clown Beetle |
| Geomysaprinus laramiensis | Clown Beetle |
| Georissus pusillus | Minute Mud-loving Beetle |
| Georyssus pusillus | Water Scavenger Beetle |
| Gerdana caritella | Moth |
| Gerris buenoi | True Bug |
| Gerris comatus | True Bug |
| Gerris gillettei | True Bug |
| Gerris incurvatus | True Bug |
| Gerris pingreensis | True Bug |
| Gharesia polunini | True Bug |
| Gibbonsia metzi | Striped Kelpfish |
| Gibbonsia montereyensis | Crevice Kelpfish |
| Gibbula funiculata | Sea Snail |
| Gillmeria albertae | Alberta Pale Plume Moth |
| Gillmeria pallidactyla | Yarrow Plume Moth |
| Gilquinia anteroporus | Parasite |
| Gitana ellisi | Amphipod |
| Givira cornelia | Moth |
| Glans carpenteri | Carpenter Carditid |
| Glaresis medialis | Enigmatic Scarab Beetle |
| Glaucina spaldingata | Moth |
| Glena nigricaria | Moth |
| Glipostenoda ambusta | Tumbling Flower Beetle |
| Glischrochilus confluentus | Sap-feeding Beetle |
| Glischrochilus fasciatus | Sap-Feeding Beetle |
| Glischrochilus lecontei | Sap-Feeding Beetle |
| Glischrochilus moratus | Sap-feeding Beetle |
| Glischrochilus vittatus | Sap-feeding Beetle |
| Globia subflava | Subflava Sedge Borer |
| Globicephala macrorhynchus | Short-Finned Pilot Whale |
| Globicornis stebbinsi | Carpet Beetle |
| Glocianus punctiger | Minute Seed Weevil |
| Glossiphonia heterodita | Freshwater Leech |
| Glossonotus univittatus | True Bug |
| Glossosoma alascense | Caddisfly |
| Glossosoma bernea | Caddisfly |
| Glossosoma excitum | Caddisfly |
| Glossosoma intermedium | Caddisfly |
| Glossosoma penitum | Caddisfly |
| Glossosoma pyroxum | Caddisfly |
| Glossosoma velona | Caddisfly |
| Glossosoma verdona | Caddisfly |
| Glossosoma wenatchee | Caddisfly |
| Gluphisia lintneri | Lintner's Gluphisia |
| Glycera americana | American Bloodworm |
| Glycera convoluta | Polychaete Worm |
| Glycera gigantea | Polychaete Worm |
| Glycera nana | Polychaete Worm |
| Glycera robusta | Polychaete Worm |
| Glycera tesselata | Polychaete Worm |
| Glycinde picta | Polychaete Worm |
| Glycinde polygnatha | Many-Jawed Worm |
| Glycinde wireni | Polychaete Worm |
| Glycymeris septentrionalis | Western Bittersweet |
| Glyphanostomum pallescens | Polychaete Worm |
| Glyphesis idahoanus | Sheetweb Spider |
| Glyphesis scopulifer | Sheetweb Spider |
| Glyphidocera septentrionella | Moth |
| Glyphina betulae | True Bug |
| Glyphipterix bifasciata | Moth |
| Glyphipterix haworthana | Haworth's Glyphipterid Moth |
| Glyptina atriventris | Skeletonizing Leaf Beetles and Flea Beetle |
| Glyptoscelis albida | Aquatic Leaf Beetle |
| Glyptoscelis albida albida | Leaf Beetle |
| Glyptoscelis artemisiae | Leaf Beetle |
| Glyptoscelis longior | Leaf Beetle |
| Glyptoscelis septentrionalis | Leaf Beetle |
| Gnaphosa antipola | Spider |
| Gnaphosa borea | Spider |
| Gnaphosa brumalis | Ground Spider |
| Gnaphosa californica | Ground Spider |
| Gnaphosa microps | Ground Spider |
| Gnaphosa muscorum | Ground Spider |
| Gnaphosa orites | Spider |
| Gnaphosa parvula | Ground Spider |
| Gnaphosa snohomish | Great Basin Bog Spider |
| Gnathia tridens | Isopod |
| Gnathonarium suppositum | Spider |
| Gnathonarium taczanowskii | Sheetweb Spider |
| Gnathoncus barbatus | Clown Beetle |
| Gnathoncus communis | Clown Beetle |
| Gnathoncus rossi | Clown Beetle |
| Gnathoncus rotundatus | Clown Beetle |
| Gnathopleustes pachychaetus | Amphipod |
| Gnathopleustes pugettensis | Amphipod |
| Gnathopleustes serratus | Amphipod |
| Gnathopleustes simplex | Amphipod |
| Gnathopleustes trichodus | Amphipod |
| Gnathotrichus retusus | Palm Seed Borer |
| Gnathotrichus sulcatus | Bark And Ambrosia Beetle |
| Gnathusa eva | Rove Beetle |
| Gnathusa tenuicornis | Rove Beetle |
| Gnatocerus cornutus | Broadhorned Flour Beetle |
| Gnophos macguffini | Moth |
| Gnorimoschema alaskense | Moth |
| Gnorimoschema albangulatum | Moth |
| Gnorimoschema albimarginella | Moth |
| Gnorimoschema assimile | Moth |
| Gnorimoschema aterrimum | Moth |
| Gnorimoschema bacchariselloides | Moth |
| Gnorimoschema brachiatum | Moth |
| Gnorimoschema contrarium | Moth |
| Gnorimoschema dudiella | Moth |
| Gnorimoschema foliatum | Moth |
| Gnorimoschema gallaeasterella | Moth |
| Gnorimoschema gallaesolidaginis | Goldenrod Gall Moth |
| Gnorimoschema herbichii | Moth |
| Gnorimoschema lateritium | Moth |
| Gnorimoschema ligulatum | Moth |
| Gnorimoschema nanulum | Moth |
| Gnorimoschema octomaculella | Moth |
| Gnorimoschema pedmontella | Moth |
| Gnorimoschema reichli | Moth |
| Gnorimoschema rotundatum | Moth |
| Gnorimoschema septentrionella | Moth |
| Gnorimoschema sheperdiae | Moth |
| Gnorimoschema signatum | Moth |
| Gnorimoschema subterraneum | Moth |
| Gnorimoschema triocellella | Moth |
| Gnorimosphaeroma insulare | Freshwater Pill Bug |
| Gnypeta brevicornis | Rove Beetle |
| Gnypeta caerula | Rove Beetle |
| Gnypeta crebrepunctata | Rove Beetle |
| Gnypeta helenae | rove beetle |
| Gnypeta lohsei | Rove Beetle |
| Goeracea genota | Caddisfly |
| Gonatium crassipalpum | Sheetweb Spider |
| Gonatopsis borealis | Boreopacific Gonate Squid |
| Gonatus berryi | Berry Armhook Squid |
| Gonatus californiensis | Gonate Squid |
| Gonatus madokai | Madokai Gonate Squid |
| Gonatus onyx | Black-Eyed Squid |
| Gonatus oregonensis | Oregon Armhook Squid |
| Gonatus pyros | Fiery Armhook Squid |
| Gonatus ursabrunae | Brown Bear Armhook Squid |
| Goniada annulata | Polychaete Worm |
| Goniada brunnea | Polychaete Worm |
| Gonioctena americana | American Aspen Beetle |
| Gonioctena nivosa alberta | Beetle |
| Gonioctena nivosa arctica | Leaf Beetle |
| Gonioctena notmani | Scriptured Leaf Beetle |
| Gonioctena occidentalis | Leaf Beetle |
| Goniusa caseyi | Rove Beetle |
| Gonocephalum bilineatum | Darkling Beetle |
| Gossyparia spuria | True Bug |
| Goussia clupearum | Parasite |
| Grammonota angusta | Sheetweb Spider |
| Grammonota gentilis | Sheetweb Spider |
| Grammonota gigas | Spider |
| Grammonota kincaidi | Sheetweb Spider |
| Grammonota vittata | Sheetweb Spider |
| Grampus griseus | Risso's Dolphin |
| Grandifoxus aciculatus | Amphipod |
| Grandifoxus dixonensis | Amphipod |
| Grandifoxus grandis | Amphipod |
| Grandifoxus lindbergi | Amphipod |
| Grandifoxus longirostris | Amphipod |
| Grandifoxus vulpinus | Amphipod |
| Graneledone boreopacifica | Deep-Sea Octopus |
| Grantia comoxensis | Sponge |
| Graphoderus liberus | Predaceous Diving Beetle |
| Grapholita caeruleana | Moth |
| Grapholita conversana | Moth |
| Grapholita imitativa | Moth |
| Grapholita lana | Moth |
| Grapholita libertina | Moth |
| Grapholita packardi | Cherry Fruitworm Moth |
| Grapholita prunivora | Lesser Appleworm Moth |
| Grapholita vitrana | Moth |
| Graphops marcassita marcassita | Beetle |
| Greenarus thoracicus | Net-winged Beetle |
| Greya enchrysa | Moth |
| Greya obscuromaculata | Moth |
| Greya pectinifera | Moth |
| Greya politella | Moth |
| Greya punctiferella | Moth |
| Greya subalba | Moth |
| Greya variabilis | Moth |
| Greya variata | Moth |
| Grillotia heptanchi | Parasite |
| Grus americana | Whooping Crane |
| Grus grus | Eurasian Crane |
| Grylloblatta athapaska | Rock-crawler |
| Grylloblatta campodeiformis | Rock-crawler |
| Grylloblatta campodeiformis athapaska | Rock-Crawler |
| Grylloblatta campodeiformis campodeiformis | Rock-Crawler |
| Grylloblatta campodeiformis nahanni | Rock-Crawler |
| Grylloblatta scudderi | Rock-Crawler |
| Grynocharis oregonensis | Bark-Gnawing Beetle |
| Grypus equiseti | Waterhyacinth Weevil |
| Grypus leechi | Waterhyacinth Weevil |
| Gymnetron antirrhini | Snout Beetle |
| Gymnetron netum | Snout Beetle |
| Gymnetron pascuorum | Snout Beetle |
| Gymnetron tetrum | Snout Beetle |
| Gymnorhinus cyanocephalus | Pinyon Jay |
| Gymnusa atra | Rove Beetle |
| Gymnusa pseudovariegata | Rove Beetle |
| Gynaephora rossii | Moth |
| Gyponana hasta | True Bug |
| Gyponana quebecensis | True Bug |
| Gyponana salsa | True Bug |
| Gyponana serpenta | True Bug |
| Gyponana striata | True Bug |
| Gypsonoma aceriana | European Poplar Shoot Borer |
| Gypsonoma adjuncta | Moth |
| Gypsonoma fasciolana | Moth |
| Gypsonoma haimbachiana | Cottonwood Twig Borer |
| Gypsonoma salicicolana | Moth |
| Gypsonoma substitutionis | Moth |
| Gyraulus vermicularis | Pacific Coast Gyro |
| Gyrinus aeratus | Whirligig Beetle |
| Gyrinus cavatus | Whirligig Beetle |
| Gyrinus confinis | Whirligig Beetle |
| Gyrinus consobrinus | Whirligig Beetle |
| Gyrinus hoppingi | Whirligig Beetle |
| Gyrinus latilimbus | Whirligig Beetle |
| Gyrinus minutus | Whirligig Beetle |
| Gyrinus opacus | Whirligig Beetle |
| Gyrinus pectoralis | Whirligig Beetle |
| Gyrinus pleuralis | Whirligig Beetle |
| Gyrinus plicifer | Whirligig Beetle |
| Gyrinus punctellus | Whirligig Beetle |
| Gyrinus sayi | Whirligig Beetle |
| Gyrinus wallisi | Whirligig Beetle |
| Gyrodactylus harengi | Parasite |
| Gyrodactylus nerkae | Parasite |
| Gyrodactylus salmonis | Parasite |
| Gyrohypnus angustatus | Rove Beetle |
| Gyrohypnus fracticornis | Crab-like Rove Beetle |
| Gyrophaena affinis | Rove Beetle |
| Gyrophaena californica | Rove Beetle |
| Gyrophaena keeni | Rove Beetle |
| Gyrophaena nana | Rove Beetle |
| Gyrophaena uteana | rove beetle |
| Habrocerus capillaricornis | Rove Beetle |
| Habronattus captiosus | Jumping Spider |
| Habronattus festus | Jumping Spider |
| Habronattus jucundus | Jumping Spider |
| Habronattus sansoni | Jumping Spider |
| Hackmania prominula | Meshweaver |
| Hadena caelestis | Cutworm Moth |
| Hadena capsularis | Cutworm Moth |
| Hadena ectrapela | Cutworm Moth |
| Hadena variolata | Cutworm Moth |
| Hadenella pergentilis | Cutworm Moth |
| Hadraule blaisdelli | Minute Tree-Fungus Beetle |
| Hadrobregmus americanus | Deathwatch Beetle |
| Hadrobregmus quadrulus | Death-watch Beetle |
| Hadrobregmus truncatus | Deathwatch Beetle |
| Hadrobunus grandis | Harvestman |
| Hadromorphus callidus | Glowing Click Beetle |
| Hadromorphus glaucus | Glowing Click Beetle |
| Hadronema militare | True Bug |
| Hadronema simplex | True Bug |
| Hadroplontus litura | Weevil |
| Hadrotes crassus | Large Rove Beetle |
| Haemaphysalis chordeilis | Bird Tick |
| Haemaphysalis leporispalustris | Rabbit Tick |
| Haematopis grataria | Chickweed Geometer Moth |
| Haematopota americana | Horse Fly |
| Haemobaphes theragrae | Parasite |
| Haeterius exiguus | Clown Beetle |
| Haeterius tristriatus | Clown Beetle |
| Hahnia arizonica | Hahniid Spider |
| Hahnia cinerea | Hahniid Spider |
| Hahnia glacialis | Hahniid Spider |
| Hahnia ononidum | Hahniid Spider |
| Halargyreus johnsoni | Dainty Mora |
| Halicardia perplicata | Verticord Clam |
| Halichondria bowerbanki | Sponge |
| Halichondria lambei | Sponge |
| Haliclona oculata | Sponge |
| Halicnemia patera | Sponge |
| Halimedusa typus | Jellyfish |
| Haliplus allisonae | Crawling Water Beetle |
| Haliplus columbiensis | Crawling Water Beetle |
| Haliplus distinctus | Crawling Water Beetle |
| Haliplus fulvus | Crawling Water Beetle |
| Haliplus leechi | Crawling Water Beetle |
| Haliplus leechi carteri | Crawling Water Beetle |
| Haliplus longulus | Crawling Water Beetle |
| Haliplus salinarius | Crawling Water Beetle |
| Haliplus salmo | Crawling Water Beetle |
| Haliplus ungularis | Crawling Water Beetle |
| Haliplus vancouverensis | Crawling Water Beetle |
| Halisarca sacra | Sponge |
| Halistylus pupoideus | Pupa Halistyle |
| Hallomenus binotatus | Polypore Fungus Beetle |
| Hallomenus punctulatus | Polypore Fungus Beetle |
| Hallomenus scapularis | Polypore Fungus Beetle |
| Hallomenus serricornis | Polypore Fungus Beetle |
| Halocercus monoceris | Parasite |
| Hamacantha hyaloderma | Sponge |
| Hamamelistes spinosus | True Bug |
| Hamatoscalpellum columbianum | Many-Plated Goose-Neck Barnacle |
| Haminoea japonica | Japan Bubble Snail |
| Haminoea virescens | Green Bubble Shell |
| Hanleyella oldroydi | Chiton |
| Hapalaraea angustior | Rove Beetle |
| Hapalaraea caseyi | Rove Beetle |
| Hapalaraea floralis | Rove Beetle |
| Hapalaraea hamata | Ocellate Rove Beetle |
| Hapalaraea humilis | Rove Beetle |
| Hapalaraea longula | Rove Beetle |
| Hapalaraea megarthroides | Ocellate Rove Beetle |
| Haplidus testaceus | Oak Borer |
| Haplodrassus bicornis | Ground Spider |
| Haplodrassus eunis | Ground Spider |
| Haplodrassus hiemalis | Ground Spider |
| Haplodrassus signifer | Ground Spider |
| Haplonema hamatulum | Parasite |
| Haploperla brevis | Stonefly |
| Haploperla chilnualna | Stonefly |
| Hardya dentata | True Bug |
| Harenactis attenuata | Giant Burrowing Anemone |
| Harminius triundulatus | Click Beetle |
| Harmostes dorsalis | True Bug |
| Harmothoe extenuata | Yellow And Brown Scaleworm |
| Harmothoe fragilis | Chocolate And White Scaleworm |
| Harmothoe imbricata | Fifteen-Scaled Worm |
| Harmothoe multisetosa | Many-Bristled Scaleworm |
| Harpalellus basilaris | Ground Beetle |
| Harpalus amputatus amputatus | Beetle |
| Harpalus animosus | Ground Beetle |
| Harpalus atrichatus | Ground Beetle |
| Harpalus carbonatus | Ground Beetle |
| Harpalus cautus | Ground Beetle |
| Harpalus desertus | False Bombardier Beetle |
| Harpalus egregius | Ground Beetle |
| Harpalus fraternus | False Bombardier Beetle |
| Harpalus fulvilabris | False Bombardier Beetle |
| Harpalus fuscipalpis | False Bombardier Beetle |
| Harpalus herbivagus | False Bombardier Beetle |
| Harpalus hoppingi | Ground Beetle |
| Harpalus intactus | Ground Beetle |
| Harpalus laevipes | Ground Beetle |
| Harpalus laticeps | False Bombardier Beetle |
| Harpalus obnixus | False Bombardier Beetle |
| Harpalus ochropus | Ground Beetle |
| Harpalus opacipennis | False Bombardier Beetle |
| Harpalus pennsylvanicus | Ground Beetle |
| Harpalus pensylvanicus | Ground Beetle |
| Harpalus plenalis | Ground Beetle |
| Harpalus pleuriticus | Ground Beetle |
| Harpalus seclusus | Ground Beetle |
| Harpalus solitaris | Ground Beetle |
| Harpalus somnulentus | False Bombardier Beetle |
| Harpiniopsis fulgens | Amphipod |
| Hayhurstia atriplicis | True Bug |
| Hebecephalus algidus | True Bug |
| Hebecephalus borealis | True Bug |
| Hebecephalus crassus | True Bug |
| Hebecephalus occidentalis | True Bug |
| Hebecephalus planaria | True Bug |
| Hebecephalus sagittatus | True Bug |
| Hebecephalus truncatus | True Bug |
| Hecalus atascaderus | True Bug |
| Hecalus major | True Bug |
| Hecalus montanus | True Bug |
| Hecalus viridis | True Bug |
| Hedya separatana | Pink-washed Leafroller |
| Helcystogramma casca | Moth |
| Helcystogramma fernaldella | Fernald's Helcystogramma |
| Helcystogramma melanocarpa | Moth |
| Helichus columbianus | Long-Toed Water Beetle |
| Helichus striatus | Long-toed Water Beetle |
| Helichus striatus striatus | Beetle |
| Heliocheilus paradoxus | Cutworm Moth |
| Heliopetes ericetorum | Large White Skipper |
| Heliothis borealis | Moth |
| Heliothis oregonica | Oregon Gem Moth |
| Heliothis phloxiphaga | Darker Spotted Straw Moth |
| Heliothis proruptus | Moth |
| Hellinsia corvus | Pale-yellow Plume Moth |
| Hellinsia costatus | Pale-edged Plume Moth |
| Hellinsia fieldi | Field's Plume Moth |
| Hellinsia gratiosus | Favored Plume Moth |
| Hellinsia helianthi | Sunflower Plume Moth |
| Hellinsia homodactylus | Plain Plume Moth |
| Hellinsia inconditus | Disorderly Plume Moth |
| Hellinsia kellicottii | Goldenrod Plume Moth |
| Hellinsia lacteodactylus | Milky Plume Moth |
| Hellinsia phoebus | Everlasting Plume Moth |
| Helobdella stagnalis | Hirudinoidea |
| Helochara communis | True Bug |
| Helochara delta | True Bug |
| Helophora insignis | Sheetweb Spider |
| Helophora reducta | Sheetweb Spider |
| Helophora tunagyna | Sheetweb Spider |
| Helophorus columbianus | Water Scavenger Beetle |
| Helophorus furius | Water Scavenger Beetle |
| Helophorus inflectus | Water Scavenger Beetle |
| Helophorus lacustris | Water Scavenger Beetle |
| Helophorus ledatus | Water Scavenger Beetle |
| Helophorus leechi | Water Scavenger Beetle |
| Helophorus linearoides | Minute Mud-loving Beetle |
| Helophorus nitiduloides | Minute Mud-loving Beetle |
| Helophorus nitidulus | Water Scavenger Beetle |
| Helophorus oblongus | Water Scavenger Beetle |
| Helophorus orientalis | Minute Mud-loving Beetle |
| Helophorus sempervarians | Minute Mud-loving Beetle |
| Helophorus tuberculatus | Water Scavenger Beetle |
| Helops californicus | Darkling Beetle |
| Helops convexulus | Darkling Beetle |
| Helops laetus | Flour Beetle |
| Helops pernitens | Flour Beetle |
| Helops punctipennis | Darkling Beetle |
| Helops regulus | Darkling Beetle |
| Hemaris diffinis | Snowberry Clearwing |
| Hemerobius conjunctus | Brown Lacewing |
| Hemerobius humulinus | Brown Lacewing |
| Hemerobius neadelphus | Brown Lacewing |
| Hemerobius nigrans | Brown Lacewing |
| Hemerobius pacificus | Brown Lacewing |
| Hemerobius pinidumus | Brown Lacewing |
| Hemerobius simulans | Brown Lacewing |
| Hemeroplanis historialis | Moth |
| Hemerotrecha denticulata | Sun Scorpion |
| Hemiberlesia popularum | True Bug |
| Hemichroa crocea | Striped Alder Sawfly |
| Hemicoelus carinatus | Eastern Deathwatch Beetle |
| Hemicoelus defectus | Death-watch Beetle |
| Hemicrepidius carbonatus | Glowing Click Beetle |
| Hemicrepidius dilaticollis | Click Beetle |
| Hemicrepidius montanus | Glowing Click Beetle |
| Hemicrepidius morio | Glowing Click Beetle |
| Hemicrepidius tumescens | Glowing Click Beetle |
| Hemioniscus balani | Barnacle Parasitic Isopod |
| Hemiurus levinseni | Parasite |
| Henneguya zschokkei | Parasite |
| Henoticus californicus | Silken Fungus Beetle |
| Henoticus serratus | Silken Fungus Beetle |
| Henotiderus lorna | Silken Fungus Beetle |
| Henricia leviuscula annectens | Blood Star |
| Henricia longispina longispina | Sea Star |
| Henricus contrastana | Moth |
| Henricus fuscodorsana | Cone Cochylid Moth |
| Henricus infernalis | Moth |
| Henrylygus nubilus | True Bug |
| Henrylygus ultranubilus | True Bug |
| Heptacarpus moseri | Alaskan Coastal Shrimp |
| Heptacarpus taylori | Taylor Coastal Shrimp |
| Heptagenia elegantula | Mayfly |
| Heptagenia flavescens | Mayfly |
| Heptagenia solitaria | Mayfly |
| Hermadione truncata | Bristly-Tail Scaleworm |
| Herpetocypris reptans | Seed Shrimp |
| Herpetogramma thestealis | Zigzag Herpetogramma |
| Herpyllus hesperolus | Ground Spider |
| Herpyllus propinquus | Ground Spider |
| Hesperia assiniboia assiniboia | Assiniboian Skipper |
| Hesperia colorado | Common Branded Skipper |
| Hesperia nevada | Nevada Skipper |
| Hesperobaenus abbreviatus | Minute Clubbed Beetle |
| Hesperocimex coloradensis | True Bug |
| Hesperocorixa atopodonta | True Bug |
| Hesperocorixa laevigata | True Bug |
| Hesperocorixa michiganensis | True Bug |
| Hesperocorixa vulgaris | True Bug |
| Hesperodiaptomus caducus | Copepod |
| Hesperodiaptomus franciscanus | Copepod |
| Hesperodiaptomus hirsutus | Copepod |
| Hesperodiaptomus kenai | Copepod |
| Hesperonemastoma modestum | Harvestman |
| Hesperonoe complanata | Polychaete Worm |
| Hesperoperla pacifica | Stonefly |
| Hesperophylax occidentalis | Caddisfly |
| Hesperotettix viridis | Snakeweed Grasshopper |
| Hesperotettix viridis pratensis | Snakeweed Grasshopper |
| Hesperotingis antennata | True Bug |
| Hesperotingis fuscata | True Bug |
| Hesperotingis occidentalis | True Bug |
| Hetaerius tristriatus | Clown Beetle |
| Heterakis gallinarum | Parasite |
| Heterhelus pennatus | Sap-Feeding Beetle |
| Heterhelus sericans pennatus | Beetle |
| Heterhelus sericans sericans | Beetle |
| Heterlimnius koebelei | Riffle Beetle |
| Heterocerus inciertus | Variegated Mud-Loving Beetle |
| Heterocerus infrequens | Beetle |
| Heterocerus unicus | Variegated Mud-loving Beetle |
| Heterococcus nudus | True Bug |
| Heterocope septentrionalis | Copepod |
| Heterogaster behrensii | True Bug |
| Heteromastus filiformis | Polychaete Worm |
| Heteromastus filobranchus | Polychaete Worm |
| Heterophoxus affinis | Amphipod |
| Heterophoxus conlanae | Amphipod |
| Heterophoxus ellisi | Amphipod |
| Heteropora magna | Bryozoa |
| Heterotanais groenlandicus | Isopod |
| Heterothops asperatus | Rove Beetle |
| Heterothops carbonatus | Large Rove Beetle |
| Heterothops conformis | Large Rove Beetle |
| Heterothops fraternus | Rove Beetle |
| Heterothops fusculus | Large Rove Beetle |
| Heterothops minor | Rove Beetle |
| Heterothops pusio | Large Rove Beetle |
| Heterothops sordidus | Rove Beetle |
| Hexarthrum thujae | Snout Beetle |
| Hilaira herniosa | Sheetweb Spider |
| Hillia iris | Cutworm Moth |
| Hillia maida | Cutworm Moth |
| Hima fratercula | Japanese Nassa |
| Hima mendicus | Western Lean Nassa |
| Hincksina alba | Bryozoa |
| Hincksina minuscula | Bryozoa |
| Hincksina nigrans | Bryozoa |
| Hincksina pallida | Bryozoa |
| Hincksina polacantha | Bryozoa |
| Hincksina velata | Bryozoa |
| Hippasteria californica | Sea Star |
| Hippodamia arctica | Spotless Lady Beetle |
| Hippodamia expurgata | Lady Beetle |
| Hippodamia glacialis glacialis | Spotless Lady Beetle |
| Hippodamia lunatomaculata dobzhanskyi | Lady Beetle |
| Hippodamia moesta bowditchi | Spotless Lady Beetle |
| Hippodamia moesta moesta | Spotless Lady Beetle |
| Hippodamia quinquesignata ambigua | Spotless Lady Beetle |
| Hippodamia sinuata crotchi | Spotless Lady Beetle |
| Hippodamia sinuata spuria | Spotless Lady Beetle |
| Hippodamia washingtoni | Lady Beetle |
| Hippomedon columbianus | Amphipod |
| Hippomedon granulosus | Amphipod |
| Hippomonavella longirostrata | Bryozoa |
| Hippoporella nitescens | Bryozoa |
| Hippothoa divaricata | Bryozoa |
| Hippuriphila canadensis | Skeletonizing Leaf Beetles and Flea Beetle |
| Hippuriphila equiseti | Skeletonizing Leaf Beetles and Flea Beetle |
| Hippuriphila mancula | Skeletonizing Leaf Beetles and Flea Beetle |
| Hister abbreviatus | Clown Beetle |
| Hister depurator | Clown Beetle |
| Hister furtivus | Clown Beetle |
| Hister militaris | Clown Beetle |
| Hogna frondicola | Wolf Spider |
| Holcocera concolor | Moth |
| Holcostethus abbreviatus | True Bug |
| Holcostethus limbolarius | True Bug |
| Holcostethus piceus | True Bug |
| Holcostethus tristis | True Bug |
| Holobus vancouveri | Rove Beetle |
| Hololepta aequalis | Clown Beetle |
| Holophryxus alaskensis | Isopod |
| Holoporella brunnea | Bryozoa |
| Holostrophus impressicollis | False Darkling Beetle |
| Holtbyrnia latifrons | Teardrop Tubeshoulder |
| Homaemus aeneifrons consors | True Bug |
| Homaemus bijugis | True Bug |
| Homaemus parvulus | True Bug |
| Homaeotarsus californicus | Rove Beetle |
| Homaeotarsus cinctus | Spiny-legged Rove Beetle |
| Homalopoma baculum | Berry Dwarf-Turban |
| Homoeosoma albescentella | Moth |
| Homoeosoma electella | Sunflower Moth |
| Homoeosoma impressale | Moth |
| Homoeosoma oslarellum | Moth |
| Homoeosoma phaeoboreas | Moth |
| Homoglaea californica | Cutworm Moth |
| Homoglaea carbonaria | Cutworm Moth |
| Homoglaea dives | Cutworm Moth |
| Homoglaea hircina | Cutworm Moth |
| Homophylax acutus | Caddisfly |
| Homophylax andax | Caddisfly |
| Homophylax crotchi | Caddisfly |
| Homophylax flavipennis | Caddisfly |
| Homorthodes carneola | Cutworm Moth |
| Homorthodes discreta | Cutworm Moth |
| Homosetia costisignella | Moth |
| Honora mellinella | Moth |
| Honora montinatatella | Moth |
| Honora perdubiella | Moth |
| Honora subsciurella | Moth |
| Hoplia callipyge | Monkey Beetle |
| Hoplia sackenii | Monkey Beetle |
| Hoplinus echinata | True Bug |
| Hoplistoscelis heidemanni | Heteroptera |
| Hoplomachus affiguratus | True Bug |
| Hoploplana californica | Papillate Flatworm |
| Hoppingiana hudsonica | Soft-winged Flower Beetle |
| Horcotes quadricristatus | Sheetweb Spider |
| Horisme incana | Moth |
| Horisme intestinata | Brown Bark Carpet Moth |
| Horistonotus pilosus | Click Beetle |
| Horistonotus sufflatus | Click Beetle |
| Hormathia digitata | Sea Anemone |
| Hourstonius vilordes | Amphipod |
| Hunterella nodulosa | Parasite |
| Hyadaphis foeniculi | True Bug |
| Hyale oculata | Amphipod |
| Hyalinoecia bilineata rigida | Polychaete Worm |
| Hyaliodes harti | True Bug |
| Hyalonema populiferum | Sponge |
| Hyalophora gloveri | Glover's Silkmoth |
| Hyalopteroides humilis | True Bug |
| Hyalopterus pruni | True Bug |
| Hyaloscotes fragmentella | Moth |
| Hyaloscotes pithopoera | Moth |
| Hybauchenidium cymbadentatum | Sheetweb Spider |
| Hybauchenidium gibbosum | Sheetweb Spider |
| Hybocodon prolifer | Jellyfish |
| Hybomitra aasa | Horse Fly |
| Hybomitra affinis | Horse Fly |
| Hybomitra arpadi | Horse Fly |
| Hybomitra astuta | Horse Fly |
| Hybomitra atrobasis | Horse Fly |
| Hybomitra californica | Horse Fly |
| Hybomitra captonis | Horse Fly |
| Hybomitra enigmata | Horse Fly |
| Hybomitra epistates | Horse Fly |
| Hybomitra frontalis | Horse Fly |
| Hybomitra fulvilateralis | Horse Fly |
| Hybomitra hearlei | Horse Fly |
| Hybomitra illota | Horse Fly |
| Hybomitra itasca | Horse Fly |
| Hybomitra lanifera | Horse Fly |
| Hybomitra lasiophthalma | Horse Fly |
| Hybomitra liorhina | Horse Fly |
| Hybomitra lurida | Horse Fly |
| Hybomitra melanorhina | Horse Fly |
| Hybomitra nitidifrons | Horse Fly |
| Hybomitra osburni | Horse Fly |
| Hybomitra pechumani | Horse Fly |
| Hybomitra procyon | Horse Fly |
| Hybomitra rupestris | Horse Fly |
| Hybomitra sonomensis | Horse Fly |
| Hybomitra tetrica | Horse Fly |
| Hybomitra trepida | Horse Fly |
| Hybomitra zygota | Horse Fly |
| Hyboscolex pacifica | Pacific Humback Worm |
| Hydatophylax hesperus | Caddisfly |
| Hydnobius contortus | Round Fungus Beetle |
| Hydnobius crestonensis | Round Fungus Beetle |
| Hydnobius femoratus | Round Fungus Beetle |
| Hydnobius kiseri | Small Carrion Beetle |
| Hydnobius longidens | Small Carrion Beetle |
| Hydnobius longulus | Round Fungus Beetle |
| Hydnobius matthewsii | Round Fungus Beetle |
| Hydnobius pumilus | Small Scavenger Beetle |
| Hydnobius simulator | Round Fungus Beetle |
| Hydnobius stacesmithi | Round Fungus Beetle |
| Hydnobius strigilatus | Round Fungus Beetle |
| Hydnobius substriatus | Small Carrion Beetle |
| Hydractinia armata | Hydroid |
| Hydractinia laevispina | Hydroid |
| Hydraecia perobliqua | Cutworm Moth |
| Hydraena circulata | Minute Moss Beetle |
| Hydraena nigra | Minute Moss Beetle |
| Hydraena occidentalis | Minute Moss Beetle |
| Hydraena pacifica | Minute Moss Beetle |
| Hydraena petila | Minute Moss Beetle |
| Hydraena vandykei | Minute Moss Beetle |
| Hydrelia albifera | Fragile White Carpet Moth |
| Hydriomena albifasciata | Moth |
| Hydriomena albimontanata | Moth |
| Hydriomena crokeri | Moth |
| Hydriomena divisaria | Black-dashed Hydriomena |
| Hydriomena edenata | Moth |
| Hydriomena exculpata | Moth |
| Hydriomena expurgata | Moth |
| Hydriomena macdunnoughi | Moth |
| Hydriomena morosata | Moth |
| Hydriomena nevadae | Moth |
| Hydriomena perfracta | Shattered Hydriomena |
| Hydriomena quinquefasciata | Moth |
| Hydriomena ruberata | Ruddy Highflyer Moth |
| Hydriomena tuolumne | Moth |
| Hydrobius fuscipes | Minute Mud-loving Beetle |
| Hydrochara obtusata | Minute Mud-loving Beetle |
| Hydrochus currani | Minute Mud-loving Beetle |
| Hydrochus granulatus | Minute Mud-loving Beetle |
| Hydrochus pseudosquamifer | Minute Mud-loving Beetle |
| Hydrochus squamifer | Minute Mud-loving Beetle |
| Hydrocolus paugus | Predaceous Diving Beetle |
| Hydrocolus rubyae | Predaceous Diving Beetle |
| Hydrocolus stagnalis | Predaceous Diving Beetle |
| Hydrometra martini | True Bug |
| Hydrophilus triangularis | Water Scavenger Beetle |
| Hydroporus appalachius | Predaceous Diving Beetle |
| Hydroporus badiellus | Predaceous Diving Beetle |
| Hydroporus boraeorum | Beetle |
| Hydroporus browni | Predacious Diving Beetle |
| Hydroporus columbianus | Predaceous Diving Beetle |
| Hydroporus compertus | Predacious Diving Beetle |
| Hydroporus dentellus | Predaceous Diving Beetle |
| Hydroporus despectus | Predaceous Diving Beetle |
| Hydroporus edwardsi | Predacious Diving Beetle |
| Hydroporus falsificus | Predacious Diving Beetle |
| Hydroporus fatigus | Predacious Diving Beetle |
| Hydroporus fortis | Predaceous Diving Beetle |
| Hydroporus funestus | Predacious Diving Beetle |
| Hydroporus fuscipennis | Predaceous Diving Beetle |
| Hydroporus geniculatus | Beetle |
| Hydroporus hirtellus | Beetle |
| Hydroporus lapponum | Predaceous Diving Beetle |
| Hydroporus morio | Predaceous Diving Beetle |
| Hydroporus nigellus | Predacious Diving Beetle |
| Hydroporus notabilis | Predaceous Diving Beetle |
| Hydroporus obscurus | Predacious Diving Beetle |
| Hydroporus occidentalis | Predaceous Diving Beetle |
| Hydroporus paugus | Predacious Diving Beetle |
| Hydroporus pervicinus | Predaceous Diving Beetle |
| Hydroporus planiusculus | Predacious Diving Beetle |
| Hydroporus puberulus | Predaceous Diving Beetle |
| Hydroporus rectus | Predaceous Diving Beetle |
| Hydroporus rubyae | Predacious Diving Beetle |
| Hydroporus rufinasus | Predaceous Diving Beetle |
| Hydroporus signatus | Predaceous Diving Beetle |
| Hydroporus signatus signatus | Beetle |
| Hydroporus similaris | Predacious Diving Beetle |
| Hydroporus sinuatipes | Predacious Diving Beetle |
| Hydroporus striola | Predaceous Diving Beetle |
| Hydroporus tademus | Predacious Diving Beetle |
| Hydroporus tartaricus | Predaceous Diving Beetle |
| Hydroporus tenebrosus | Predaceous Diving Beetle |
| Hydroporus terminalis | Predacious Diving Beetle |
| Hydroporus transpunctatus | Predacious Diving Beetle |
| Hydroporus tristis | Predaceous Diving Beetle |
| Hydroporus undulatus | Predacious Diving Beetle |
| Hydropsyche alternans | Caddisfly |
| Hydropsyche amblis | Caddisfly |
| Hydropsyche bifida | Caddisfly |
| Hydropsyche californica | Caddisfly |
| Hydropsyche centra | Caddisfly |
| Hydropsyche cockerelli | Caddisfly |
| Hydropsyche jewetti | Caddisfly |
| Hydropsyche occidentalis | Caddisfly |
| Hydropsyche oslari | Caddisfly |
| Hydropsyche riola | Caddisfly |
| Hydropsyche slossonae | Caddisfly |
| Hydropsyche tana | Caddisfly |
| Hydroptila arctia | Caddisfly |
| Hydroptila consimilis | Caddisfly |
| Hydroptila rono | Caddisfly |
| Hydroptila xera | Caddisfly |
| Hydrothassa boreela | Leaf Beetle |
| Hygrotus compar | Predaceous Diving Beetle |
| Hygrotus dissimilis | Predaceous Diving Beetle |
| Hygrotus infuscatus | Predaceous Diving Beetle |
| Hygrotus intermedius | Predacious Diving Beetle |
| Hygrotus masculinus | Predaceous Diving Beetle |
| Hygrotus nigrescens | Predacious Diving Beetle |
| Hygrotus obscureplagiatus | Predacious Diving Beetle |
| Hygrotus picatus | Predaceous Diving Beetle |
| Hygrotus punctilineatus | Predaceous Diving Beetle |
| Hygrotus semivittatus | Predaceous Diving Beetle |
| Hygrotus turbidus | Predaceous Diving Beetle |
| Hygrotus unguicularis | Predaceous Diving Beetle |
| Hylaius oregonensis | True Bug |
| Hylastes gracilis | Bark and Ambrosia Beetle |
| Hylastes longicollis | Bark and Ambrosia Beetle |
| Hylastes macer | Bark and Ambrosia Beetle |
| Hylastes nigrinus | Bark And Ambrosia Beetle |
| Hylastes opacus | Bark and Ambrosia Beetle |
| Hylastes ruber | Bark And Ambrosia Beetle |
| Hylastes tenuis | Bark and Ambrosia Beetle |
| Hylastinus obscurus | Clover Root Borer |
| Hyles euphorbiae | Leafy Spurge Hawk Moth |
| Hylis irvinei | False Click Beetle |
| Hylis terminalis | False Click Beetle |
| Hylobius congener | Snout Beetle |
| Hylobius pinicola | one |
| Hylobius transversovittatus | one |
| Hylobius warreni | Warren Root Collar Weevil |
| Hylocichla mustelina | Wood Thrush |
| Hylocurus hirtellus | Cedar Bark Beetle |
| Hylurgops porosus | Bark and Ambrosia Beetle |
| Hylurgops reticulatus | Bark and Ambrosia Beetle |
| Hylurgops rugipennis pinifex | Bark And Ambrosia Beetle |
| Hylurgops subcostulatus subcostulatus | Bark And Ambrosia Beetle |
| Hymedesanisochela rayae | Sponge |
| Hymenaster koehleri | Cushion Star |
| Hymenaster perissonotus | Cushion Star |
| Hymenaster quadrispinosus | Cushion Star |
| Hymeniacidon ungodon | Sponge |
| Hymenodora frontalis | Pacific Ambereye |
| Hymenodora glacialis | Northern Ambereye |
| Hymenorus caurinus | Darkling Beetle |
| Hymenorus megops | Comb-clawed Beetle |
| Hymenorus sinuatus | Darkling Beetle |
| Hypagyrtis piniata | Pine Measuringworm Moth |
| Hypatopa simplicella | Moth |
| Hypatopa titanella | Moth |
| Hypebaeus bicolor | Soft-winged Flower Beetle |
| Hypena atomaria | Cutworm Moth |
| Hypena edictalis | Cutworm Moth |
| Hypena palparia | Cutworm Moth |
| Hypenodes fractilinea | Broken-line Hypenodes |
| Hypenodes sombrus | Moth |
| Hypera compta | one |
| Hypera nigrirostris | Lesser Clover Leaf Weevil |
| Hypera pubicollis | Snout Beetle |
| Hypera punctata | Snout Beetle |
| Hypera trivittata | Snout Beetle |
| Hyperaspidius comparatus | Amber Lady Beetle |
| Hyperaspidius vittigerus | Amber Lady Beetle |
| Hyperaspis borealis | Lady Beetle |
| Hyperaspis consimilis | Sigil Lady Beetle |
| Hyperaspis dissoluta dissoluta | Lady Beetle |
| Hyperaspis fastidiosa | Lady Beetle |
| Hyperaspis lateralis | Lady Beetle |
| Hyperaspis oregona | Lady Beetle |
| Hyperaspis quadrivittata | Lady Beetle |
| Hyperaspis simulatrix | Lady Beetle |
| Hyperaspis undulata | Lady Beetle |
| Hypercompe permaculata | Tiger Moth |
| Hyperia antarctica | Amphipod |
| Hyperia galba | Amphipod |
| Hyperia medusarum | Amphipod |
| Hyperia spinigera | Amphipod |
| Hyperietta stephenseni | Amphipod |
| Hyperomyzus lactucae | True Bug |
| Hyperomyzus pallidus | True Bug |
| Hyperomyzus ribiellus | True Bug |
| Hyperomyzus sandilandicus | True Bug |
| Hyperplatys montana | Longhorned Beetle |
| Hyperprosopon argenteum | Walleye Surfperch |
| Hypnoidus abbreviatus | Abbreviated Wireworm |
| Hypnoidus bicolor | ctenicera |
| Hypnoidus impressicollis | ctenicera |
| Hypnoidus rivularius | ctenicera |
| Hypnoidus squalidus | ctenicera |
| Hypocaccus acorni | Clown Beetle |
| Hypocaccus aeneipunctatus | Clown Beetle |
| Hypocaccus bigemmeus | Clown Beetle |
| Hypocaccus estriatus | Clown Beetle |
| Hypocaccus fraternus | Clown Beetle |
| Hypocaccus kincaidi | Clown Beetle |
| Hypocoena basistriga | Moth |
| Hypocoena inquinata | Moth |
| Hypocoena rufostrigata | Moth |
| Hypoganus diversicolor | Glowing Click Beetle |
| Hypoganus rupestris | Click Beetle |
| Hypomma marxi | Spider |
| Hypomma subarcticum | Sheetweb Spider |
| Hypospygia cohortalis | Moth |
| Hypospygia thymetusalis | Moth |
| Hyppa brunneicrista | Cutworm Moth |
| Hypsagonus mozinoi | Kelp Poacher |
| Hypselistes jacksoni | Sheetweb Spider |
| Hypsosinga alberta | Orbweaver |
| Hypsosinga groenlandica | Orbweaver |
| Hypsosinga pygmaea | Orbweaver |
| Hypsosinga rubens | Spider |
| Hypsosinga sp. | Spider |
| Hyptiotes gertschi | Hackled Orbweaver |
| Hysterothylacium aduncum | Parasite |
| Hystrichophora asphodelana | Moth |
| Hystrichophora paradisiae | Moth |
| Hystrichophora stygiana | Moth |
| Ianiropsis analoga | Isopod |
| Ianiropsis derjugini | Isopod |
| Ianiropsis kincaidi | Isopod |
| Ianiropsis tridens | Isopod |
| Icelinus burchami | Dusky Sculpin |
| Icelinus filamentosus | Threadfin Sculpin |
| Icelus spiniger | Thorny Sculpin |
| Ichthyococcus elongatus | Slim Lightfish |
| Icichthys lockingtoni | Medusafish |
| Idaea rotundopennata | Moth |
| Idanthyrsus macropalea | Polychaete Worm |
| Idanthyrsus saxicava | Stone-Cave Sandmason Tubeworm |
| Idia aemula | Common Idia |
| Idia concisa | Moth |
| Idia lubricalis | Glossy Black Idia Moth |
| Idia occidentalis | Cutworm Moth |
| Idia suffusalis | Moth |
| Idiacanthus antrosomus | Pacific Dragonfish |
| Idiocerus alternatus | True Bug |
| Idiocerus amabilis | True Bug |
| Idiocerus amoenus | True Bug |
| Idiocerus aureus | True Bug |
| Idiocerus bovinus | True Bug |
| Idiocerus cinctus | True Bug |
| Idiocerus cingulatus | True Bug |
| Idiocerus cognatus | True Bug |
| Idiocerus concinnus | True Bug |
| Idiocerus couleanus | True Bug |
| Idiocerus delongi | True Bug |
| Idiocerus distinctus | True Bug |
| Idiocerus femoratus | True Bug |
| Idiocerus formosus | True Bug |
| Idiocerus freytagi | True Bug |
| Idiocerus glacialis | True Bug |
| Idiocerus indistinctus | True Bug |
| Idiocerus iodes | True Bug |
| Idiocerus lachrymalis | True Bug |
| Idiocerus levis | True Bug |
| Idiocerus lunaris | True Bug |
| Idiocerus maximus | True Bug |
| Idiocerus midas | True Bug |
| Idiocerus morosus | True Bug |
| Idiocerus musteus | True Bug |
| Idiocerus nervatus | True Bug |
| Idiocerus omani | True Bug |
| Idiocerus pallidus | True Bug |
| Idiocerus pericallis | True Bug |
| Idiocerus productus | True Bug |
| Idiocerus ramentosus | True Bug |
| Idiocerus raphus | True Bug |
| Idiocerus rufus | True Bug |
| Idiocerus setaceus | True Bug |
| Idiocerus snowi | True Bug |
| Idiocerus striolus | True Bug |
| Idiocerus suturalis | True Bug |
| Idiocerus tahotus | True Bug |
| Idiocerus utahnus | True Bug |
| Idiocerus vanduzeei | True Bug |
| Idiocerus venosus | True Bug |
| Idiocerus xanthiops | True Bug |
| Idiodonus aurantiacus | True Bug |
| Idiodonus kennicottii | True Bug |
| Idiodonus morsei | True Bug |
| Idiopterus nephrelepidis | True Bug |
| Idolus columbiana | Click Beetle |
| Idolus debilis | Brown Wireworm |
| Idolus occidentalis | Brown Wireworm |
| Idotea aleutica | Aleutian Isopod |
| Idotea fewkesi | Surfgrass Isopod |
| Idotea obscura | Obscure Isopod |
| Idotea recta | Isopod |
| Idotea rufescens | Isopod |
| Idotea schmitti | Isopod |
| Idotea stenops | Smalleyed Isopod |
| Idotea urotoma | Shouldered Isopod |
| Illinoia azaleae | True Bug |
| Illinoia crystleae | True Bug |
| Illinoia crystleae bartholomewi | True Bug |
| Illinoia davidsoni | True Bug |
| Illinoia lambersi | True Bug |
| Illinoia liriodendri | True Bug |
| Illinoia magna | True Bug |
| Illinoia maxima | True Bug |
| Illinoia menziesiae | True Bug |
| Illinoia morrisoni | True Bug |
| Illinoia patriciae | True Bug |
| Illinoia rhokalaza | True Bug |
| Illinoia richardsi | True Bug |
| Illinoia rubicola | True Bug |
| Illinoia spiraeae | True Bug |
| Illinoia spiraecola | True Bug |
| Illinoia subviridis | True Bug |
| Illinoia wahnaga | True Bug |
| Ilnacora albifrons | True Bug |
| Ilnacorella argentata | True Bug |
| Ilnacorella sulcata | True Bug |
| Ilybiosoma bjorkmanae | Beetle |
| Ilybiosoma perplexum | Predaceous Diving Beetle |
| Ilybiosoma seriatum | Predaceous Diving Beetle |
| Ilybius angustior | Predaceous Diving Beetle |
| Ilybius confertus | Beetle |
| Ilybius discedens | Predaceous Diving Beetle |
| Ilybius discors | Beetle |
| Ilybius erichsoni | Predaceous Diving Beetle |
| Ilybius fraterculus | Predaceous Diving Beetle |
| Ilybius hypomelas | Predaceous Diving Beetle |
| Ilybius opacus | Predaceous Diving Beetle |
| Ilybius picipes | Predaceous Diving Beetle |
| Ilybius pleuriticus | Predaceous Diving Beetle |
| Ilybius quadrimaculatus | Predaceous Diving Beetle |
| Ilybius subaeneus | Predaceous Diving Beetle |
| Ilybius vancouverensis | Predaceous Diving Beetle |
| Ilybius verisimilis | Beetle |
| Ilybius vittiger | Predacious Diving Beetle |
| Ilybius wasastjernae | Beetle |
| Ilyocryptus acutifrons | Water Flea |
| Ilyocryptus cuneatus | Water Flea |
| Ilyocryptus gouldeni | Water Flea |
| Ilyocryptus sordidus | Water Flea |
| Ilyocryptus spinosus | Water Flea |
| Ilyocypris bradyi | Seed Shrimp |
| Ilyocypris gibba | Seed Shrimp |
| Imbrexodius oclairi | Amphipod |
| Improphantes complicatus | Spider |
| Incestophantes duplicatus | Sheetweb Spider |
| Incestophantes lamprus | Spider |
| Incestophantes mercedes | Sheetweb Spider |
| Incestophantes washingtoni | Spider |
| Interjectio columbiella | Moth |
| Interjectio denticulella | Moth |
| Ione cornuta | Ghost Shrimp Parasitic Isopod |
| Ioscytus politus politus | True Bug |
| Iphthiminus salebrosus | Beetle |
| Iphthiminus serratus | Comb-clawed Beetle |
| Iphthimus salebrosus | Darkling Beetle |
| Ipimorpha pleonectusa | Cutworm Moth |
| Ipimorpha viridipallida | Cutworm Moth |
| Ips borealis | Cedar Bark Beetle |
| Ips concinnus | Cedar Bark Beetle |
| Ips emarginatus | Cedar Bark Beetle |
| Ips integer | Bark And Ambrosia Beetle |
| Ips latidens | Bark And Ambrosia Beetle |
| Ips mexicanus | Bark And Ambrosia Beetle |
| Ips montanus | Bark And Ambrosia Beetle |
| Ips perroti | Bark And Ambrosia Beetle |
| Ips perturbatus | Northern Spruce Engraver |
| Ips pini | Pine Engraver |
| Ips plastographus plastographus | Bark And Ambrosia Beetle |
| Ips tridens | Cedar Bark Beetle |
| Irbisia brachycera | True Bug |
| Irbisia elongata | True Bug |
| Irbisia fuscipubescens | True Bug |
| Irbisia knighti | True Bug |
| Irbisia nigripes | True Bug |
| Irbisia pacifica | True Bug |
| Irbisia sericans | True Bug |
| Irbisia serrata | True Bug |
| Irbisia shulli | True Bug |
| Iridopsis clivinaria | Mountain Mahogany Looper Moth |
| Iridopsis larvaria | Bent-line Gray Moth |
| Ironodes arctus | Mayfly |
| Ironodes flavipennis | Mayfly |
| Ironodes nitidus | Mayfly |
| Ischalia vancouverensis | Broad-hipped Flower Beetle |
| Ischnosoma fimbriatum | Crab-like Rove Beetle |
| Ischnosoma pictum | Crab-like Rove Beetle |
| Ischnosoma splendidum | Crab-like Rove Beetle |
| Ischyropalpus cochisei | pseudo |
| Ischyropalpus nitidulus | pseudo |
| Ischyropalpus turgidicollis | pseudo |
| Iselica ovoidea | Sea Snail |
| Islandiana cristata | Sheetweb Spider |
| Islandiana falsifica | Sheetweb Spider |
| Islandiana flaveola | Sheetweb Spider |
| Islandiana holmi | Spider |
| Islandiana princeps | Sheetweb Spider |
| Isocapnia agassizi | Stonefly |
| Isocapnia fraseri | Stonefly |
| Isocapnia grandis | Stonefly |
| Isocapnia spenceri | Stonefly |
| Isocapnia vedderensis | Stonefly |
| Isochnus rufipes | Snout Beetle |
| Isocirrus longiceps | Polychaete Worm |
| Isocyamus delphini | Amphipod |
| Isogenoides colubrinus | Stonefly |
| Isogenoides elongatus | Stonefly |
| Isomira comstocki | Comb-clawed Beetle |
| Isoperla decolorata | Stonefly |
| Isoperla fulva | Stonefly |
| Isoperla fusca | Stonefly |
| Isoperla longiseta | Stonefly |
| Isoperla mormona | Stonefly |
| Isoperla petersoni | Stonefly |
| Isoperla pinta | Stonefly |
| Isoperla quinquepuncta | Stonefly |
| Isoperla quinquepunctata | Stonefly |
| Isoperla sobria | Stonefly |
| Isoperla sordida | Stonefly |
| Isoperla transmarina | Stonefly |
| Isophrictis trimaculella | Moth |
| Isorhipis obliqua | False Click Beetle |
| Isorhipis occidentalis | False Click Beetle |
| Isurus oxyrinchus | Shortfin Shark |
| Ithytrichia clavata | Caddisfly |
| Ixala desperaria | Moth |
| Ixodes angustus | Tick |
| Ixodes auritulus | Avian Tick |
| Ixodes hearlei | Tick |
| Ixodes kingi | Rotund Tick |
| Ixodes marmotae | Marmot Tick |
| Ixodes ochotonae | Pika Tick |
| Ixodes rugosus | Tick |
| Ixodes sculptus | Shoulder Tick |
| Ixodes signatus | Tick |
| Ixodes soricis | Shrew Tick |
| Ixodes spinipalpis | Tick |
| Ixodes texanus | Raccoon Tick |
| Ixodes uriae | Common Seabird Tick |
| Iziphya albipes | True Bug |
| Iziphya flabella | True Bug |
| Iziphya spenceri | True Bug |
| Jacksonia papillata | True Bug |
| Jalysus wickhami | True Bug |
| Janiralata occidentalis | Isopod |
| Janiralata solasteri | Isopod |
| Janua pagenstecheri | Polychaete Worm |
| Japananus hyalinus | True Bug |
| Japetella diaphana | Pelagic Octopus |
| Jasmeneira pacifica | Polychaete Worm |
| Jassa borowskyae | Amphipod |
| Jassa morinoi | Amphipod |
| Jassa oclari | Amphipod |
| Jassa shawi | Amphipod |
| Jassa slatteryi | Amphipod |
| Jassa staudei | Amphipod |
| Javania cailleti | Stony Coral |
| Javasella lutulentella | True Bug |
| Javasella pellucida | True Bug |
| Jones amaknakensis | Sponge |
| Jonthonota nigripes | Blacklegged Tortoise Beetle |
| Judolia quadrata | Elderberry Longhorn Beetle |
| Kaestneria pullata | Sheetweb Spider |
| Kaestneria rufula | Sheetweb Spider |
| Kali indica | Snaketooth Fish |
| Kalissus nitidus | Rove Beetle |
| Kalohydnobius strigilatus | Small Carrion Beetle |
| Katadesmia vincula | Clam |
| Kathroperla perdita | Stonefly |
| Katsuwonus pelamis | Skipjack Tuna |
| Kelliella galatheae | Clam |
| Kirkpatrickia topsenti | Sponge |
| Kleidocerys franciscanus | True Bug |
| Kleidocerys modestus | True Bug |
| Kleidocerys ovalis | True Bug |
| Kleidocerys resedae fuscomaculatus | True Bug |
| Kleidocerys resedae resedae | True Bug |
| Knightomiroides contortae | True Bug |
| Knightomiroides ponderosae | True Bug |
| Koebelia californica | True Bug |
| Kogia breviceps | Pygmy Sperm Whale |
| Kogia sima | Dwarf Sperm Whale |
| Kogutus modestus | Stonefly |
| Kogutus nonus | Stonefly |
| Kolenetrus plenus | True Bug |
| Kophobelemnon affine | Pennatulacean |
| Kophobelemnon hispidum | Pennatulacean |
| Koroga megalops | Amphipod |
| Kronborgia pugettensis | Pink Parasitic Flatworm |
| Kroyera carinata | Amphipod |
| Kurtzia arteaga | Beaded Mangelia |
| Kuschelina lugens | Skeletonizing Leaf Beetles and Flea Beetle |
| Kuschelina vians | Skeletonizing Leaf Beetles and Flea Beetle |
| Kyboasca atrolabes | True Bug |
| Kyboasca bipunctata | True Bug |
| Kyboasca confusa | True Bug |
| Kyboasca maligna | True Bug |
| Kyboasca pergandei | True Bug |
| Kyboasca simplex | True Bug |
| Kyboasca splendida | True Bug |
| Labia minor | Little Earwig |
| Labopidea lenensis | True Bug |
| Labopidea nigrisetosa | True Bug |
| Labopidea simplex | True Bug |
| Labops brooksi | True Bug |
| Labops burmeisteri | True Bug |
| Labops hesperius | True Bug |
| Labops hirtus | True Bug |
| Labops tumidifrons | True Bug |
| Labops verae | True Bug |
| Labyrinthocyathus quaylei | Stony Coral |
| Labyrinthuloides haliotidis | Parasite |
| Lacanobia atlantica | Cutworm Moth |
| Lacanobia grandis | Grand Arches Moth |
| Laccobius agilis | Giant Water Scavenger Beetle |
| Laccobius borealis | Giant Water Scavenger Beetle |
| Laccobius cinereus columbianus | Giant Water Scavenger Beetle |
| Laccocera lineata | True Bug |
| Laccocera oregonensis | True Bug |
| Laccocera vanduzeei | True Bug |
| Laccocera vittipennis | True Bug |
| Lacconotus pinicola | Palm and Flower Beetle |
| Laccophilus maculosus decipiens | Predaceous Diving Beetle |
| Laccornis conoideus | Predaceous Diving Beetle |
| Laccornis pacificus | Predaceous Diving Beetle |
| Lacerna fistulata | Bryozoa |
| Lacinipolia acutipennis | Moth |
| Lacinipolia anguina | Cutworm Moth |
| Lacinipolia lustralis | Cutworm Moth |
| Lacinipolia meditata | Cutworm Moth |
| Lacinipolia rectilinea | Cutworm Moth |
| Lacinipolia sareta | Moth |
| Lacinipolia stenotis | Cutworm Moth |
| Lacon rorulentus | Rain Click Beetle |
| Lacon sparsus | Rain Click Beetle |
| Lacuna carinata | Carinate Lacuna |
| Lacuna vincta | Wide Lacuna |
| Laemophloeus biguttatus | Lined Flat Bark Beetle |
| Laemostenus complanatus | Ground Beetle |
| Laemostenus terricola | Ground Beetle |
| Laemostenus terricola terricola | Beetle |
| Laevicephalus salarius | True Bug |
| Lagenipora punctulata | Bryozoa |
| Lagenipora socialis | Bryozoa |
| Lagenipora spinulosa | Bryozoa |
| Lagisca multisetosa multisetosa | Polychaete Worm |
| Lagisca multisetosa papillata | Polychaete Worm |
| Lagisca rarispina | Polychaete Worm |
| Lamellaria diegoensis | Sand Diego Ear Snail |
| Lamiota achromata | Rove Beetle |
| Lamiota concessa | Rove Beetle |
| Lamiota keeni | Rove Beetle |
| Lamiota profecta | Rove Beetle |
| Lampadena urophaos | Taillight Lanternfish |
| Lampracanthia crassicornis | True Bug |
| Lampris guttatus | Opah |
| Lamprochernes minor | Pseudoscorpion |
| Lampronia aenescens | Moth |
| Lampronia capitella | Currant Shoot Borer |
| Lampronia corticella | Raspberry Bud Moth |
| Lampronia humilis | Moth |
| Lampronia sublustris | Moth |
| Lampronia taylorella | Moth |
| Lampropterus ruficollis | Longhorned Beetle |
| Lampropteryx suffumata | Moth |
| Lanassa venusta venusta | Polychaete Worm |
| Lanceolus pacifica | Amphipod |
| Landryia impositella | Moth |
| Languria convexicollis | Pleasing Fungus Beetle |
| Lanius collurio | Red-backed Shrike |
| Lanius cristatus | Brown Shrike |
| Lanternarius brunneus | Variegated Mud-Loving Beetle |
| Lanternarius gemmatus | Variegated Mud-Loving Beetle |
| Lanternarius parrotus | Variegated Mud-Loving Beetle |
| Lanternarius sinuosus | Variegated Mud-Loving Beetle |
| Laonice cirrata | Polychaete Worm |
| Laonice pugettensis | Polychaete Worm |
| Laonome kroyeri | Polychaete Worm |
| Lapara bombycoides | Northern Pine Sphinx Moth |
| Laphania boecki | Polychaete Worm |
| Laphria astur | Robber Fly |
| Laphria felis | Robber Fly |
| Laqueus jeffreysi | Gastropod |
| Lara avara amplipennis | Riffle Beetle |
| Largidea grossa | True Bug |
| Largidea shoshonea | True Bug |
| Laricobius erichsonii | Tooth-Necked Fungus Beetle |
| Laricobius laticollis | Tooth-Necked Fungus Beetle |
| Laricobius nigrinus | Tooth-necked Fungus Beetle |
| Larinioides cornutus | Furrow Orbweaver |
| Larinioides patagiatus | Orbweaver |
| Larinus minutus | Weevil |
| Larisia nigricolor | False Flower Beetle |
| Lasaea adansoni | Adanson's Lepton |
| Lasaeola prona | Cobweb Weaver |
| Lasconotus complex | Cylindrical Bark Beetle |
| Lasconotus planipennis | Cylindrical Bark Beetle |
| Lasconotus tuberculatus | Cylindrical Bark Beetle |
| Lasconotus vegrandis | Cylindrical Bark Beetle |
| Lasionycta brunnea | Moth |
| Lasionycta caesia | Moth |
| Lasionycta carolynae | Moth |
| Lasionycta fergusoni | Moth |
| Lasionycta gelida | Moth |
| Lasionycta haida | Moth |
| Lasionycta illima | Moth |
| Lasionycta impingens | Cutworm Moth |
| Lasionycta lagganata | Cutworm Moth |
| Lasionycta leucocycla | Cutworm Moth |
| Lasionycta luteola | Cutworm Moth |
| Lasionycta macleani | Cutworm Moth |
| Lasionycta perplexella | Moth |
| Lasionycta promulsa | Moth |
| Lasionycta quadrilunata | Cutworm Moth |
| Lasionycta secedens | Cutworm Moth |
| Lasionycta silacea | Moth |
| Lasionycta taigata | Cutworm Moth |
| Lasius alienus | Ant |
| Lasius coloradensis | Ant |
| Lasius crypticus | Ant |
| Lasius fallax | Ant |
| Lasius flavus | Ant |
| Lasius interjectus | Larger Yellow Ant |
| Lasius latipes | Ant |
| Lasius neoniger | Ant |
| Lasius occidentalis | Ant |
| Lasius pallitarsis | Ant |
| Lasius subumbratus | Ant |
| Lasius vestitus | Ant |
| Latalus curtus | True Bug |
| Latalus histrionicus | True Bug |
| Latalus intermedius | True Bug |
| Latalus missellus | True Bug |
| Latalus mundus | True Bug |
| Latalus occidentalis | True Bug |
| Latalus ocellaris | True Bug |
| Latalus personatus | True Bug |
| Latalus sobrinus | True Bug |
| Lathridius crenatus | Minute Brown Scavenger Beetle |
| Lathridius hirtus | Minute Brown Scavenger Beetle |
| Lathridius minutus | Squarenosed Fungus Beetle |
| Lathridius nigritus | Minute Brown Scavenger Beetle |
| Lathridius protensicollis | Minute Brown Scavenger Beetle |
| Lathrobium divisum | Rove Beetle |
| Lathrobium fauveli | Spiny-legged Rove Beetle |
| Lathrobium fulvipenne | Spiny-legged Rove Beetle |
| Lathrobium hesperum | Rove Beetle |
| Lathrobium nigrum | Rove Beetle |
| Lathrobium punctulatum | Rove Beetle |
| Lathrobium shoshonicum | Rove Beetle |
| Lathrobium tenue | Rove Beetle |
| Lathrobium vancouveri | Rove Beetle |
| Lathrobium washingtoni | Spiny-legged Rove Beetle |
| Lathys alberta | Spider |
| Lathys humilis | Spider |
| Lathys sp. | Spider |
| Laticorophium baconi | Amphipod |
| Latridius crenatus | Minute Brown Scavenger Beetle |
| Latridius hirtus | Minute Brown Scavenger Beetle |
| Latridius minutus | Minute Brown Scavenger Beetle |
| Latridius nigritus | Minute Brown Scavenger Beetle |
| Latridius protensicollis | Minute Brown Scavenger Beetle |
| Lebbeus catalepsis | Shrimp |
| Lebbeus eludus | Elusive Lebbeid |
| Lebbeus washingtonianus | Slope Lebbeid |
| Lebia cyanipennis | Colorful Foliage Ground Beetle |
| Lebia fuscata | Colorful Foliage Ground Beetle |
| Lebia guttula | Colorful Foliage Ground Beetle |
| Lebia perita | Colorful Foliage Ground Beetle |
| Lebia pumila | Colorful Foliage Ground Beetle |
| Lebia vittata | Colorful Foliage Ground Beetle |
| Lechriops californica | Snout Beetle |
| Lechriops californicus | Minute Seed Weevil |
| Lecithaster gorbuscha | Parasite |
| Lecithochirium exodicum | Parasite |
| Lecithodesmus spinosus | Parasite |
| Lecithophyllum anteroporum | Parasite |
| Lecithophyllum botryophorum | Parasite |
| Lecontia discicollis | Conifer Bark Beetle |
| Ledella sandersi | Clam |
| Ledellina convexirostrata | Clam |
| Lederia arctica | False Darkling Beetle |
| Leiobunum aldrichi | Harvestman |
| Leiobunum exilipes | Harvestman |
| Leiodes alesi | Small Scavenger Beetle |
| Leiodes assimilis | Small Carrion Beetle |
| Leiodes collaris | Round Fungus Beetle |
| Leiodes conjuncta | Small Scavenger Beetle |
| Leiodes curvata | Round Fungus Beetle |
| Leiodes dilatata | Round Fungus Beetle |
| Leiodes grossa | Round Fungus Beetle |
| Leiodes karinae | Small Scavenger Beetle |
| Leiodes lateritia | Round Fungus Beetle |
| Leiodes longitarsis | Small Scavenger Beetle |
| Leiodes lostine | Round Fungus Beetle |
| Leiodes merkeliana | Round Fungus Beetle |
| Leiodes neglecta | Small Carrion Beetle |
| Leiodes paludicola | Round Fungus Beetle |
| Leiodes puncticollis | Small Carrion Beetle |
| Leiodes punctostriata | Small Carrion Beetle |
| Leiodes punctulata | Round Fungus Beetle |
| Leiodes rufipes | Small Carrion Beetle |
| Leiodes rufobasalis | Small Scavenger Beetle |
| Leiodes serripes | Round Fungus Beetle |
| Leiodes strigata | Round Fungus Beetle |
| Leiodes tenuis | Round Fungus Beetle |
| Leiodes valida | Round Fungus Beetle |
| Leiothlypis luciae | Lucy's Warbler |
| Leitoscoloplos panamensis | Polychaete Worm |
| Leitoscoloplos pugettensis | Polychaete Worm |
| Lemmus trimucronatus | Nearctic Brown Lemming |
| Lenarchus brevipennis | Caddisfly |
| Lenarchus fautini | Caddisfly |
| Lenarchus gravidus | Caddisfly |
| Lensia conoidea | Jellyfish |
| Lepas fascicularis | Own-Float Goose-Neck Barnacle |
| Lepas hillii | Hill's Goose-Neck Barnacle |
| Lepas pacifica | Pacific Goose-Neck Barnacle |
| Lepeophtheirus paulus | Parasite |
| Lepesoma alternatum | Snout Beetle |
| Lepesoma bakeri | Snout Beetle |
| Lepesoma decoratum | Snout Beetle |
| Lepesoma granicolle granicolle | Snout Beetle |
| Lepesoma lecontei | Snout Beetle |
| Lepesoma luteum | Snout Beetle |
| Lepesoma raucum | Snout Beetle |
| Lepesoma tanneri | Snout Beetle |
| Lepesoma ursinum | Snout Beetle |
| Lepeta caeca | Pustulate Blind Limpet |
| Lepetodrilus corrugatus | Corrugated Limpet |
| Lepidapedon gadi | Parasite |
| Lepidapedon microcotyleum | Parasite |
| Lepidargyrus ancorifer | True Bug |
| Lepidasthenia berkeleyae | Polychaete Worm |
| Lepidasthenia longicirrata | Snow-Speckled Scaleworm |
| Lepidepecreum garthi | Amphipod |
| Lepidepecreum gurjanovae | Amphipod |
| Lepidogobius lepidus | Bay Goby |
| Lepidonotus spiculus | Polychaete Worm |
| Lepidonotus squamatus | Polychaete Worm |
| Lepidophorus alternatus | Broad-nosed Weevil |
| Lepidophorus inquinatus | Broad-nosed Weevil |
| Lepidophorus lineaticollis | Broad-nosed Weevil |
| Lepidophorus pumilus | Snout Beetle |
| Lepidophyllum cameroni | Parasite |
| Lepidopleurus cancellatus | Arctic Cancellata Chiton |
| Lepidosaphes ulmi | True Bug |
| Lepidostoma quercina | Caddisfly |
| Lepidostoma rhino | Caddisfly |
| Lepidostoma stigma | Caddisfly |
| Lepidostoma strophis | Caddisfly |
| Lepidozona cooperi | Cooper's Scaled Chiton |
| Lepidozona willetti | Willett's Scaled Chiton |
| Lepraliella bispina | Bryozoa |
| Leptacinus batychrus | Rove Beetle |
| Leptacinus intermedius | Crab-like Rove Beetle |
| Leptamphopus paripes | Amphipod |
| Lepthyphantes alpinus | Sheetweb Spider |
| Lepthyphantes chamberlini | Sheetweb Spider |
| Lepthyphantes furcillifer | Sheetweb Spider |
| Lepthyphantes intricatus | Sheetweb Spider |
| Lepthyphantes leprosus | Sheetweb Spider |
| Lepthyphantes rainieri | Sheetweb Spider |
| Lepthyphantes turbatrix | Sheetweb Spider |
| Leptinillus validus | Round Fungus Beetle |
| Leptinotarsa decemlineata | Colorado Potato Beetle |
| Leptinus occidentamericanus | Mouse Nest Beetle |
| Leptobunus parvulus | Harvestman |
| Leptochiton alveolus | Chiton |
| Leptochiton nexus | Chiton |
| Leptodiaptomus angustilobus | Copepod |
| Leptodiaptomus insularis | Copepod |
| Leptodiaptomus minutus | Copepod |
| Leptodiaptomus novamexicanus | Copepod |
| Leptodiaptomus siciloides | Copepod |
| Leptodiaptomus signicauda | Copepod |
| Leptogaster arida | Robber Fly |
| Leptogaster coloradensis | Robber Fly |
| Leptogaster fornicata | Robber Fly |
| Leptophlebia cupida | Mayfly |
| Leptophlebia gravastella | Mayfly |
| Leptophlebia nebulosa | Mayfly |
| Leptophloeus alternans | Flat Bark Beetle |
| Leptopterna amoena | True Bug |
| Leptostales ferruminaria | Moth |
| Leptosynapta clarki | White Burrowing Sea Cucumber |
| Leptosynapta transgressor | Red-Spotted Burrowing Sea Cucumber |
| Lepturobosca chrysocoma | Elderberry Longhorn Beetle |
| Leptusa gatineauensis | Rove Beetle |
| Leptychaster anomalus | Sea Star |
| Leptychaster arcticus | Arctic Leptychaster |
| Leptychaster inermis | Sea Star |
| Leptychaster pacificus | Pacific Leptychaster |
| Lepyrus gemellus gemellus | Snout Beetle |
| Lepyrus nordenskioeldi canadensis | Snout Beetle |
| Lepyrus oregonus tessellatus | Snout Beetle |
| Lepyrus palustris | one |
| Lessertia dentichelis | Sheetweb Spider |
| Lestidiops ringens | Slender Barracudina |
| Lestomyia sabulona | Robber Fly |
| Leucandra pyriformis | Sponge |
| Leucandra taylori | Sponge |
| Leucania anteroclara | Moth |
| Leucania commoides | Cutworm Moth |
| Leucania insueta | Cutworm Moth |
| Leucania oregona | Cutworm Moth |
| Leucobrephos brephoides | Scarce Infant Moth |
| Leucopsacus scoliodocus | Sponge |
| Leucoptera pachystimella | Moth |
| Leucoptera spartifoliella | Moth |
| Leucothea pulchra | Jellyfish |
| Leukartiara foersteri | Jellyfish |
| Leuroglossus stilbius | California Smoothtongue |
| Leuronychus pacificus | Harvestman |
| Levinsenia gracilis | Polychaete Worm |
| Liburniella ornata | True Bug |
| Lichnanthe rathvoni | Bumble Bee Scarab Beetle |
| Ligidium gracile | Isopod |
| Ligula intestinalis | Parasite |
| Ligyrocoris diffusus | True Bug |
| Ligyrocoris latimarginatus | True Bug |
| Ligyrocoris sylvestris | True Bug |
| Lillipathes wingi | Black Coral |
| Limacus flavus | Yellow Gardenslug |
| Limatula attenuata | Attenuate Fileclam |
| Limatula saturna | File Clam |
| Limatula vancouverensis | Vancouver Fileclam |
| Limenitis archippus idaho | Viceroy |
| Limnebius borealis | Minute Moss Beetle |
| Limnephilus acula | Caddisfly |
| Limnephilus alberta | Caddisfly |
| Limnephilus alvatus | Caddisfly |
| Limnephilus bifidus | Caddisfly |
| Limnephilus canadensis | Caddisfly |
| Limnephilus cerus | Caddisfly |
| Limnephilus ectus | Caddisfly |
| Limnephilus femoralis | Caddisfly |
| Limnephilus flavastellus | Caddisfly |
| Limnephilus harrimani | Caddisfly |
| Limnephilus indivisus | Caddisfly |
| Limnephilus janus | Caddisfly |
| Limnephilus kennicotti | Caddisfly |
| Limnephilus labus | Caddisfly |
| Limnephilus lopho | Caddisfly |
| Limnephilus moestus | Caddisfly |
| Limnephilus morrisoni | Caddisfly |
| Limnephilus pallens | Caddisfly |
| Limnephilus partitus | Caddisfly |
| Limnephilus perpusillus | Caddisfly |
| Limnephilus picturatus | Caddisfly |
| Limnephilus rhombicus | Caddisfly |
| Limnephilus sansoni | Caddisfly |
| Limnephilus santanus | Caddisfly |
| Limnephilus sierrata | Caddisfly |
| Limnephilus spinosus | Caddisfly |
| Limnephilus sublunatus | Caddisfly |
| Limnephilus sylviae | Caddisfly |
| Limnichites punctatus | Minute Marsh-loving Beetle |
| Limnocythere itasca | Seed Shrimp |
| Limnocythere sappaensis | Seed Shrimp |
| Limnocythere staplini | Seed Shrimp |
| Limnoporus dissortis | True Bug |
| Limnoporus notabilis | True Bug |
| Limnoria lignorum | Northern Gribble |
| Limonius bicolor | Click Beetle |
| Limonius consimilis | Glowing Click Beetle |
| Limonius crotchii | Click Beetle |
| Limonius ectypus | Glowing Click Beetle |
| Limonius fulvipilis | Click Beetle |
| Limonius infuscatus | Glowing Click Beetle |
| Limonius kuschei | Click Beetle |
| Limonius lanei | Glowing Click Beetle |
| Limonius lecontei | Click Beetle |
| Limonius ornatulus | Click Beetle |
| Limonius pectoralis | Glowing Click Beetle |
| Limonius pictus | Glowing Click Beetle |
| Limonius pilosulus | Click Beetle |
| Limonius seminudus | Glowing Click Beetle |
| Limonius venablesi | Click Beetle |
| Limopsis tenella | Clam |
| Limotettix angustatus | True Bug |
| Limotettix arctostaphyli | True Bug |
| Limotettix beameri | True Bug |
| Limotettix dasidus | True Bug |
| Limotettix divaricatus | True Bug |
| Limotettix ferganensis | True Bug |
| Limotettix finitimus | True Bug |
| Limotettix glomerosus | True Bug |
| Limotettix humidus | True Bug |
| Limotettix instabilis | True Bug |
| Limotettix melastigmus | True Bug |
| Limotettix nigrax | True Bug |
| Limotettix obesura | True Bug |
| Limotettix osborni | True Bug |
| Limotettix paludosus | True Bug |
| Limotettix plutonius | True Bug |
| Limotettix shastus | True Bug |
| Limotettix sphagneticus | True Bug |
| Limotettix uneolus | True Bug |
| Limotettix utahnus | True Bug |
| Limotettix vaccinii | True Bug |
| Limotettix xanthus | True Bug |
| Lineus ruber | Ribbon Worm |
| Lineus spatiosus | Ribbon Worm |
| Lineus torquatus | Ribbon Worm |
| Lineus vegatus | Ribbon Worm |
| Linohesperus borealis | Crab-like Rove Beetle |
| Linohesperus cuspifer | Rove Beetle |
| Linsleya sphaericollis | Oil Beetle |
| Linyphantes aeronauticus | Sheetweb Spider |
| Linyphantes anacortes | Sheetweb Spider |
| Linyphantes nehalem | Sheetweb Spider |
| Linyphantes nigrescens | Sheetweb Spider |
| Linyphantes orcinus | Sheetweb Spider |
| Linyphantes pualla | Sheetweb Spider |
| Linyphantes victoria | Sheetweb Spider |
| Linyphia triangularis | Sheetweb Spider |
| Liocyma fluctosum | Dosinia Clam |
| Liocyrtusa luggeri | Round Fungus Beetle |
| Liocyrtusa nigriclavis | Round Fungus Beetle |
| Liodessus obscurellus | Predaceous Diving Beetle |
| Liogluta atriventris | Rove Beetle |
| Liogluta insolens | Rove Beetle |
| Liogluta nitens | Rove Beetle |
| Liogluta quadricollis | Rove Beetle |
| Liogluta terminalis | Rove Beetle |
| Liogluta vasta | Rove Beetle |
| Liogluta wickhami | Rove Beetle |
| Liometopum luctuosum | Ant |
| Lionepha casta | Round Sand Beetle |
| Lionepha disjuncta | Round Sand Beetle |
| Lionepha erasa | Ground Beetle |
| Lionepha lindrothellus | Ground Beetle |
| Lionepha lummi | Ground Beetle |
| Lionepha sequoiae | Ground Beetle |
| Liopilio glaber | Harvestman |
| Liorhyssus hyalinus | True Bug |
| Liothorax alternatus | Hide Beetle |
| Liothorax subaeneus | Scarab Beetle |
| Liotrichus crestonensis | Glowing Click Beetle |
| Liotrichus sagitticollis | Glowing Click Beetle |
| Liotrichus stricklandi | Strickland's Click Beetle |
| Liotrichus umbricola | Glowing Click Beetle |
| Liotrichus umbripennis | Glowing Click Beetle |
| Liotrichus volitans | Glowing Click Beetle |
| Liparis cyclopus | Ribbon Snailfish |
| Liparis fucensis | Slipskin Snailfish |
| Liparis gibbus | Varigated Snailfish |
| Liparis mucosus | Slimy Snailfish |
| Liparis rutteri | Ringtail Snailfish |
| Liparocephalus brevipennis | Rove Beetle |
| Liparocephalus cordicollis | Rove Beetle |
| Lipolagus ochotensis | Eared Blacksmelt |
| Lirobittium attenuatum | Slender Bittium |
| Lirobittium munitum | Marine Snail |
| Lirobittium vancouverense | Gastropod |
| Lironeca californica | Parasite |
| Lissodelphis borealis | Northern Right-whale Dolpin |
| Lissodendoryx firma | Sponge |
| Listronotus appendiculatus | Cactus Weevil |
| Listronotus caudatus | Cactus Weevil |
| Listronotus delumbis | Cactus Weevil |
| Listronotus filiformis | Cactus Weevil |
| Listronotus frontalis | Cactus Weevil |
| Listronotus humilis | Cactus Weevil |
| Listronotus maculicollis | Snout Beetle |
| Listronotus porcellus | Cactus Weevil |
| Listronotus punctiger | Cactus Weevil |
| Listronotus squamiger | Cactus Weevil |
| Listronotus truncatus | Snout Beetle |
| Listrus confusus | Soft-winged Flower Beetle |
| Listrus glabratus | Soft-winged Flower Beetle |
| Listrus olympianus | Soft-winged Flower Beetle |
| Listrus plenus | Soft-winged Flower Beetle |
| Listrus provincialis | Soft-winged Flower Beetle |
| Listrus quadricollis | Soft-winged Flower Beetle |
| Listrus robustus | Soft-winged Flower Beetle |
| Litaneutria minor | Ground Mantis |
| Lithocharis capitula | Rove Beetle |
| Lithocharis obsoleta | Rove Beetle |
| Lithocharis ochracea | Spiny-legged Rove Beetle |
| Lithophane antennata | Ashen Pinion Moth |
| Lithophane atara | Cutworm Moth |
| Lithophane contenta | Cutworm Moth |
| Lithophane disposita | Dashed Gray Pinion Moth |
| Lithophane itata | Cutworm Moth |
| Lithophane patefacta | Cutworm Moth |
| Lithophane pexata | Cutworm Moth |
| Lithophane ponderosa | Cutworm Moth |
| Litomiris curtus | True Bug |
| Litomiris debilis | True Bug |
| Litomosoides guiterasi | Parasite |
| Littorina plena | Black Periwinkle |
| Littorina subrotundata | Periwinkle |
| Littorophiloscia richardsonae | Isopod |
| Livia caricis | True Bug |
| Lixellus filiformis | Snout Beetle |
| Lixus caudifer | one |
| Lixus rubellus | one |
| Lobesiodes euphorbiana | Moth |
| Lobiopa setosa | Sap-Feeding Beetle |
| Lobocleta quaesitata | Moth |
| Lobophora canavestita | Moth |
| Lobophora montanata | Moth |
| Lobophora simsata | Moth |
| Loborhynchapion cyanitinctum | Pear-shaped Weevil |
| Lobrathium caseyianum | Rove Beetle |
| Lobrathium coloradense | Rove Beetle |
| Lobrathium impressimum | Rove Beetle |
| Lobrathium multipunctatum | Rove Beetle |
| Lobrathium multipunctum multipunctum | Beetle |
| Lobrathium oregonense | Rove Beetle |
| Lobrathium rubricolle | Rove Beetle |
| Lobrathium subseriatum | Rove Beetle |
| Locustogammarus levingsi | Amphipod |
| Locustogammarus locustoides | Amphipod |
| Loma embiotocia | Parasite |
| Lomamyia occidentalis | Beaded Lacewing |
| Lomographa semiclarata | Bluish Spring Moth |
| Lonatura salsura | True Bug |
| Longicaudus trirhodus | True Bug |
| Longitarsus erro | Skeletonizing Leaf Beetles and Flea Beetle |
| Longitarsus flavicornis | Leaf Beetle |
| Longitarsus jacobaeae | Skeletonizing Leaf Beetles and Flea Beetle |
| Longitarsus quadriguttatus | Skeletonizing Leaf Beetles and Flea Beetle |
| Lopadorhynchus uncinatus | Polychaete Worm |
| Lophaxius rathbunae | Shrimp |
| Lophioderus biformis | Ant-Like Stone Beetle |
| Lophioderus insignis | Ant-Like Stone Beetle |
| Lophioderus myops | Ant-Like Stone Beetle |
| Lophioderus similis | Ant-Like Stone Beetle |
| Lophopanopeus bellus diegensis | Crab |
| Lophopogonius crinitus | Twig Girdling Beetle |
| Lopidea ampla | True Bug |
| Lopidea dakota | True Bug |
| Lopidea minor | True Bug |
| Lopidea nigridea aculeata | True Bug |
| Lopidea nigridea nigridea | True Bug |
| Lopidea picta | True Bug |
| Lopidea taurina | True Bug |
| Lopus decolor | True Bug |
| Lordithon bimaculatus | Rove Beetle |
| Lordithon cascadensis | Rove Beetle |
| Lordithon conabilis | Rove Beetle |
| Lordithon difficilis | Rove Beetle |
| Lordithon fungicola | Crab-like Rove Beetle |
| Lordithon kelleyi | Crab-like Rove Beetle |
| Lordithon longiceps | Rove Beetle |
| Lordithon oregonus | Crab-like Rove Beetle |
| Lordithon poecilus | Rove Beetle |
| Lordithon thoracicus thoracicus | Rove Beetle |
| Lordithon vandykei | Rove Beetle |
| Loricera pilicornis pilicornis | Ground Beetle |
| Loricula bipunctata | True Bug |
| Loricula elegantula | True Bug |
| Lotisma trigonana | Moth |
| Loxokalypus socialis | Entoproct |
| Loxosoma davenporti | Entoproct |
| Loxosomella nordgardi | Entoproct |
| Loxostege anartalis | Moth |
| Loxostege commixtalis | Moth |
| Loxostege ephippialis | Moth |
| Loxostege sierralis | Moth |
| Loxostege thrallophilalis | Moth |
| Loxothylacus 1 | Black-Clawed Crab Parasitic Barnacle |
| Loy thompsoni | Thompson's Corambid |
| Lozotaenia rindgei | Moth |
| Lumbricus festivus | Quebec Worm |
| Lumbrineris bifurcata | Polychaete Worm |
| Lumbrineris brevicirra | Iridescent Zoneworm |
| Lumbrineris cruzensis | Polychaete Worm |
| Lumbrineris inflata | Polychaete Worm |
| Lumbrineris japonica | Polychaete Worm |
| Lumbrineris latreilli | Polychaete Worm |
| Lumbrineris luti | Polychaete Worm |
| Lumbrineris similabris | Polychaete Worm |
| Lumpenella longirostris | Longsnout Prickleback |
| Lycaena cupreus henryae | Lustrous Copper |
| Lycaena dorcas dorcas | Dorcas Copper |
| Lycaena heteronea heteronea | Blue Copper |
| Lycaena mariposa charlottensis | Reakirt's Copper |
| Lycaena mariposa mariposa | Reakirt's Copper |
| Lycaena mariposa penroseae | Reakirt's Copper |
| Lycaena nivalis browni | Lilac-Bordered Copper |
| Lycaena rubida | Ruddy Copper |
| Lycaena rubida perkinsorum | Ruddy Copper |
| Lycenchelys camchatica | Kamchatka Eelpout |
| Lycenchelys crotalinus | Snakehead Eelpout |
| Lycenchelys jordani | Shortjaw Eelpout |
| Lycenchelys micropora | Pale Eelpout |
| Lycia rachelae | Twilight Moth |
| Lycodapus dermatinus | Eelpout |
| Lycodapus endemoscotus | Deepwater Eelpout |
| Lycodapus fierasfer | Blackmouth Eelpout |
| Lycodapus mandibularis | Pallid Eelpout |
| Lycodapus pachysoma | Stout Eelpout |
| Lycodapus parviceps | Smallhead Eelpout |
| Lycodapus psarostomatus | Specklemouth Eelpout |
| Lycodes cortezianus | Bigfin Eelpout |
| Lycodes diapterus | Black Eelpout |
| Lycodes pacificus | Blackbelly Eelpout |
| Lycoperdina ferruginea | Handsome Fungus Beetle |
| Lycophotia phyllophora | Cutworm Moth |
| Lyctocoris campestris | True Bug |
| Lyctocoris okanaganus | True Bug |
| Lyctocoris rostratus | True Bug |
| Lyctocoris stalii | True Bug |
| Lyctocoris tuberosus | True Bug |
| Lyctus brunneus | Powder-Post Beetle |
| Lyctus cavicollis | Powder-Post Beetle |
| Lyctus linearis | Powder-Post Beetle |
| Lyctus planicollis | Southern Lyctus Beetle |
| Lygaeospilus brevipilus | True Bug |
| Lygidea annexa | True Bug |
| Lygidea obscura | True Bug |
| Lygidea rosacea | True Bug |
| Lygocoris alni | True Bug |
| Lygocoris atritylus | True Bug |
| Lygocoris communis | True Bug |
| Lygocoris contaminatus | True Bug |
| Lygocoris pabulinus | True Bug |
| Lygocoris rugicollis | True Bug |
| Lygus atriflavus | True Bug |
| Lygus atritibialis | True Bug |
| Lygus borealis | True Bug |
| Lygus bradleyi | True Bug |
| Lygus ceanothi | True Bug |
| Lygus convexicollis | True Bug |
| Lygus elisus | True Bug |
| Lygus hesperus | True Bug |
| Lygus humeralis | True Bug |
| Lygus keltoni | True Bug |
| Lygus lupini | True Bug |
| Lygus oregonae | True Bug |
| Lygus potentillae | True Bug |
| Lygus punctatus | True Bug |
| Lygus robustus | True Bug |
| Lygus rubroclarus | True Bug |
| Lygus rubrosignatus | True Bug |
| Lygus rufidorsus | True Bug |
| Lygus rugulipennis | True Bug |
| Lygus scudderi | True Bug |
| Lygus shulli | True Bug |
| Lygus solidaginis | True Bug |
| Lygus striatus | True Bug |
| Lygus unctuosus | True Bug |
| Lymnaea atkaensis | Frigid Lymnaea |
| Lyonetia candida | Moth |
| Lyonetia prunifoliella | Moth |
| Lyonetia pulverulentella | Moth |
| Lyonetia saliciella | Moth |
| Lyonsia bracteata | Scaly Lyonsia |
| Lyonsiella quaylei | Clam |
| Lypoglossa angularis | Rove Beetle |
| Lypoglossa angularis angularis | Beetle |
| Lypoglossa angularis fenyesi | Beetle |
| Lypoglossa fenyesi | Rove Beetle |
| Lyrodus takanoshimensis | Takanoshima shipworm |
| Lyrula hippocrepis | Bryozoa |
| Lysilla loveni | Polychaete Worm |
| Lysippe labiata | Polychaete Worm |
| Lytta cyanipennis | Blister Beetle |
| Lytta stygica | Blister Beetle |
| Lytta viridana | Blister Beetle |
| Lytta vulnerata | Blister Beetle |
| Macalla zelleri | Zeller's Macalla |
| Macaria amboflava | Moth |
| Macaria boreata | Moth |
| Macaria brunneata | Moth |
| Macaria colata | Moth |
| Macaria exauspicata | Moth |
| Macaria loricaria | Moth |
| Macaria masquerata | Moth |
| Macaria occiduaria | Moth |
| Macaria quadrilinearia | Moth |
| Macaria sexmaculata | Six-spotted Angle Moth |
| Macaria simplex | Moth |
| Machaironyx muelleri | Amphipod |
| Machilinus aurantiacus | Bristletail |
| Macoma brota | Heavy Macoma |
| Macoma calcarea | Chalky Macoma |
| Macoma carlottensis | Charlotte Macoma |
| Macoma expansa | Expanded Macoma |
| Macoma golikovi | Oval Macoma |
| Macoma lama | Aleutian Macoma |
| Macoma middendorffi | Middendorff Macoma |
| Macoma secta | White-Sand Macoma |
| Macoma yoldiformis | Yoldia Shaped Macoma |
| Macreurops longicollis | Minute Clubbed Beetle |
| Macrochaeta pege | Polychaete Worm |
| Macrohydnobius contortus | Small Scavenger Beetle |
| Macrohydnobius crestonensis | Small Scavenger Beetle |
| Macrohydnobius matthewsii | Small Carrion Beetle |
| Macrohydnobius montanus | Small Scavenger Beetle |
| Macrohydnobius simulator | Small Carrion Beetle |
| Macrolophus rivalis | True Bug |
| Macronaemia episcopalis | Lady Beetle |
| Macronoctua onusta | Cutworm Moth |
| Macropinna microstoma | Barreleye |
| Macroporus repetitus | True Bug |
| Macropsis aurifera | True Bug |
| Macropsis basalis | True Bug |
| Macropsis bifasciata | True Bug |
| Macropsis borealis | True Bug |
| Macropsis canadensis | True Bug |
| Macropsis deviridis | True Bug |
| Macropsis fuscula | True Bug |
| Macropsis graminea | True Bug |
| Macropsis hesperia | True Bug |
| Macropsis robusta | True Bug |
| Macropsis sordida | True Bug |
| Macropsis vinea | True Bug |
| Macrorhoptus sidalceae | Snout Beetle |
| Macrorrhinia dryadella | Moth |
| Macrosaccus robiniella | Moth |
| Macrosiphoniella absinthii | True Bug |
| Macrosiphoniella artemisiae | True Bug |
| Macrosiphoniella leucanthemi | True Bug |
| Macrosiphoniella ludovicianae | True Bug |
| Macrosiphoniella millefolii | True Bug |
| Macrosiphoniella paucisetosa | True Bug |
| Macrosiphoniella sanborni | True Bug |
| Macrosiphoniella tanacetaria | True Bug |
| Macrosiphum adianti | True Bug |
| Macrosiphum aetheocornum | True Bug |
| Macrosiphum albifrons | True Bug |
| Macrosiphum audeni | True Bug |
| Macrosiphum bisensoriatum | True Bug |
| Macrosiphum californicum | True Bug |
| Macrosiphum claytoniae | True Bug |
| Macrosiphum corallorhizae | True Bug |
| Macrosiphum coryli | True Bug |
| Macrosiphum creelii | True Bug |
| Macrosiphum daphnidis | True Bug |
| Macrosiphum equiseti | True Bug |
| Macrosiphum fuscicornis | True Bug |
| Macrosiphum insulare | True Bug |
| Macrosiphum kiowanepus | True Bug |
| Macrosiphum manitobensis | True Bug |
| Macrosiphum mentzeliae | True Bug |
| Macrosiphum occidentalis | True Bug |
| Macrosiphum oregonense | True Bug |
| Macrosiphum osmaroniae | True Bug |
| Macrosiphum parvifolii | True Bug |
| Macrosiphum pseudocoryli | True Bug |
| Macrosiphum pseudorosae | Rose Aphid |
| Macrosiphum ptericolens | True Bug |
| Macrosiphum pteridis | True Bug |
| Macrosiphum pyrifoliae | True Bug |
| Macrosiphum rhamni | True Bug |
| Macrosiphum stanleyi | True Bug |
| Macrosiphum stellariae | True Bug |
| Macrosiphum tenuicauda | True Bug |
| Macrosiphum tolmiea | True Bug |
| Macrosiphum walkeri | True Bug |
| Macrosiphum willamettense | True Bug |
| Macrosiphum woodsiae | True Bug |
| Macrosteles alpinus | True Bug |
| Macrosteles binotatus | True Bug |
| Macrosteles borealis | True Bug |
| Macrosteles divisus | True Bug |
| Macrosteles elongatus | True Bug |
| Macrosteles fascifrons | True Bug |
| Macrosteles fieberi | True Bug |
| Macrosteles inundatus | True Bug |
| Macrosteles laevis | True Bug |
| Macrosteles lineatifrons | True Bug |
| Macrosteles maculipes | True Bug |
| Macrosteles quadrilineatus | True Bug |
| Macrosteles slossonae | True Bug |
| Macrosteles sordidipennis | True Bug |
| Macrosteles tessellatus | True Bug |
| Macrosteles urticae | True Bug |
| Macrosteles variatus | True Bug |
| Macrosteles vilbastei | True Bug |
| Macrotracheliella nigra | True Bug |
| Macrotylus multipunctatus | True Bug |
| Maculolachnus sijpkensi | True Bug |
| Maera (nr. rathbunae) | Amphipod |
| Maera bousfieldi | Amphipod |
| Maera fusca | Amphipod |
| Maera grossimana | Amphipod |
| Maera jerrica | Amphipod |
| Maera loveni | Amphipod |
| Maera nelsonae | Amphipod |
| Maera similis | Amphipod |
| Magdalinops alutaceus | Weevil |
| Magdalis aenescens | Bronze Appletree Weevil |
| Magdalis alutacea | one |
| Magdalis cuneiformis | one |
| Magdalis gentilis | one |
| Magdalis gracilis | one |
| Magdalis hispoides | one |
| Magdalis imbellis | one |
| Magdalis lecontei decepta | Snout Beetle |
| Magdalis subtincta | one |
| Magelona berkelelyi | Polychaete Worm |
| Magelona hobsonae | Polychaete Worm |
| Magelona longicornis | Polychaete Worm |
| Magelona sacculata | Polychaete Worm |
| Magnisudis atlantica | Duckbill Barracudina |
| Majoxiphalus major | Amphipod |
| Majoxiphalus maximus | Amphipod |
| Malachius auritus | Soft-winged Flower Beetle |
| Malachius blaisdelli | Soft-Winged Flower Beetle |
| Malachius floricola | Soft-Winged Flower Beetle |
| Malachius franciscanus | Soft-Winged Flower Beetle |
| Malachius horni | Soft-Winged Flower Beetle |
| Malachius macer | Soft-winged Flower Beetle |
| Malachius mirandus | Soft-winged Flower Beetle |
| Malachius mixtus | Soft-winged Flower Beetle |
| Malachius moerens | Soft-Winged Flower Beetle |
| Malachius nigrinus | Soft-Winged Flower Beetle |
| Malachius treventii | Soft-Winged Flower Beetle |
| Malacobdella macomae | Ribbon Worm |
| Malacobdella siliquae | Ribbon Worm |
| Malacoceros fuliginosus | Polychaete Worm |
| Malacoceros glutaeus | Polychaete Worm |
| Malacocoris chlorizans | True Bug |
| Malacocottus aleuticus | Whitetail Sculpin |
| Malacocottus kincaidi | Blackfin Sculpin |
| Malacosoma americana | Eastern Tent Caterpillar Moth |
| Maldane glebifex | Polychaete Worm |
| Maldane sarsi sarsi | Polychaete Worm |
| Maldanella harai | Polychaete Worm |
| Maldanella robusta | Polychaete Worm |
| Malenka californica | Stonefly |
| Malenka cornuta | Stonefly |
| Malezonotus angustatus | True Bug |
| Malezonotus arcuatus | True Bug |
| Malezonotus grossus | True Bug |
| Malezonotus sodalicius | True Bug |
| Malletia faba | Bean Malletia |
| Malletia talama | Clam |
| Mallos niveus | Meshweaver |
| Mallotus villosus | Capelin |
| Malmgreniella nigralba | Polychaete Worm |
| Malthodes abruptus | Soldier Beetle |
| Malthodes acuticauda | Soldier Beetle |
| Malthodes alexanderi | Soldier Beetle |
| Malthodes bakeri | Soldier Beetle |
| Malthodes canadensis | Soldier Beetle |
| Malthodes columbiensis | Soldier Beetle |
| Malthodes intricatus | Soldier Beetle |
| Malthodes macnabi | Soldier Beetle |
| Malthodes oregonus | Soldier Beetle |
| Malthodes parvulus | Soldier Beetle |
| Malthodes piceolus | Soldier Beetle |
| Malthodes piperi | Soldier Beetle |
| Malthodes stacesmithi | Soldier Beetle |
| Mamaevodiclidophora pugetensis | Parasite |
| Mamestra curialis | Moth |
| Mamillopora cupula | Bryozoa |
| Manania distincta | Jellyfish |
| Manayunkia aestuarina | Polychaete Worm |
| Mandibulophoxus alaskensis | Amphipod |
| Mandibulophoxus gilesi | Amphipod |
| Mandibulophoxus mayi | Amphipod |
| Manica hunteri | Ant |
| Marathyssa inficita | Cutworm Moth |
| Margaiostus glacialis | Click Beetle |
| Margarinotus fractifrons | Clown Beetle |
| Margarinotus harrisii | Clown Beetle |
| Margarinotus immunis | Clown Beetle |
| Margarinotus merdarius | Clown Beetle |
| Margarinotus obscurus | Clown Beetle |
| Margarinotus pluto | Clown Beetle |
| Margarinotus rectus | Clown Beetle |
| Margarinotus umbrosus | Clown Beetle |
| Margariscus margarita | Pearl Dace |
| Margarites helicinus | Helicina Margarite |
| Margarites olivaceus | Olive Margarite |
| Margolisiella kabatai | Parasite |
| Marmara arbutiella | Moth |
| Marmara oregonensis | Moth |
| Marmara pomonella | Apple Fruitminer |
| Marsenina rhombica | Marbelled Ear Snail |
| Marshallagia marshalli | Parasite |
| Marvinmeyeria lucida | Freshwater Leech |
| Maso sundevalli | Sheetweb Spider |
| Matsucoccus secretus | True Bug |
| Maulisia argipalla | Pitted Tubeshoulder |
| Mayerella banksia | Amphipod |
| Mecaphesa celer | Spider |
| Mecaphesa sierrensis | Spider |
| Mecinus pascuorum | Nut and Acorn Weevil |
| Mecomma angustatum | True Bug |
| Mecomma gilvipes | True Bug |
| Mecyna mustelinalis | Moth |
| Mecynargus monticola | Sheetweb Spider |
| Mecynargus paetulus | Sheetweb Spider |
| Medialuna californiensis | Halfmoon |
| Mediappendix vermeta | Suboval Ambersnail |
| Mediomastus ambiseta | Polychaete Worm |
| Mediomastus californiensis | Polychaete Worm |
| Mediomastus capensis | Polychaete Worm |
| Medon capitalis | Rove Beetle |
| Medon ctenophorum | Rove Beetle |
| Medon guppyi | Rove Beetle |
| Medon hatchi | Rove Beetle |
| Medon insularis | Rove Beetle |
| Medon mcleodi | Rove Beetle |
| Medon pugetensis | Rove Beetle |
| Medon quadratus | Rove Beetle |
| Medon shastanicus | Rove Beetle |
| Medon truncatus | Rove Beetle |
| Medon vancouveri | Rove Beetle |
| Megalepthyphantes nebulosus | Spider |
| Megaleuctra stigmata | Stonefly |
| Megalocotyle marginata | Parasite |
| Megalographa biloba | Cutworm Moth |
| Megalomus angulatus | Brown Lacewing |
| Megalomus fidelis | Brown Lacewing |
| Megalonotus sabulicola | True Bug |
| Megalorchestia pugettensis | Beach Hopper |
| Megalothorax minimus | Tiny Springtail |
| Megalotomus quinquespinosus | True Bug |
| Megaluropus longimerus | Amphipod |
| Megamelus flavus | True Bug |
| Megamelus uncus | True Bug |
| Megamoera borealis | Amphipod |
| Megamoera bowmani | Amphipod |
| Megamoera glacialis | Amphipod |
| Megamoera kodiakensis | Amphipod |
| Megamoera subtener | Amphipod |
| Meganola minuscula | Confused Meganola |
| Megapenthes aterrimus | Click Beetle |
| Megapenthes gentneri | Click Beetle |
| Megapenthes nigriventris | ctenicera |
| Megapenthes tartareus | ctenicera |
| Megarcys irregularis | Stonefly |
| Megarcys signata | Stonefly |
| Megarcys subtruncata | Stonefly |
| Megarcys watertoni | Stonefly |
| Megarthrus angulicollis | Flat Rove Beetle |
| Megarthrus arcuatus | Rove Beetle |
| Megarthrus atratus | Rove Beetle |
| Megarthrus excisus | Rove Beetle |
| Megarthrus occidentalis | Rove Beetle |
| Megarthrus pecki | Rove Beetle |
| Megarthrus pictus | Flat Rove Beetle |
| Megarthrus sinuaticollis | Rove Beetle |
| Megarthrus smetanai | Rove Beetle |
| Megasternum concinnum | Giant Water Scavenger Beetle |
| Megasternum obscurum | Giant Water Scavenger Beetle |
| Megasternum posticatum | Giant Water Scavenger Beetle |
| Megatoma ampla | Carpet Beetle |
| Megatoma cylindrica | Carpet Beetle |
| Megatoma kaliki | Carpet Beetle |
| Megatoma leucochlidon | Carpet Beetle |
| Megatoma perversa | Carpet Beetle |
| Megatoma pubescens | Carpet Beetle |
| Megatoma variegata | Carpet Beetle |
| Megocalea lemieuxi | Rove Beetle |
| Melacoryphus lateralis | True Bug |
| Melamphaes lugubris | Highsnout Ridgehead |
| Melanchra picta | Cutworm Moth |
| Melanchra pulverulenta | Cutworm Moth |
| Melandrya striata | False Darkling Beetle |
| Melanella falcata | Sea Snail |
| Melanochlamys diomedea | Diomedes Aglajid |
| Melanocoris longirostris | True Bug |
| Melanocoris nigricornis | True Bug |
| Melanonus zugmayeri | Coalfish |
| Melanophila acuminata | Black Fire Beetle |
| Melanophila drummondi drummondi | Metallic Wood Boring Beetles |
| Melanophila occidentalis | Metallic Wood-boring Beetle |
| Melanophthalma americana | Minute Brown Scavenger Beetle |
| Melanophthalma pumila | Minute Brown Scavenger Beetle |
| Melanophthalma villosa | Minute Brown Scavenger Beetle |
| Melanopleurus perplexus | True Bug |
| Melanoplus alpinus | Alpine Grasshopper |
| Melanoplus borealis | Northern Grasshopper |
| Melanoplus bruneri | Bruner Locust |
| Melanoplus cinereus | Spur-throated Grasshopper |
| Melanoplus confusus | Pasture Spur-Throated Grasshopper |
| Melanoplus dawsoni | Grasshopper |
| Melanoplus digitifer | Spur-throated Grasshopper |
| Melanoplus foedus | Grasshopper |
| Melanoplus foedus foedus | Grasshopper |
| Melanoplus huroni | Grasshopper |
| Melanoplus infantilis | Grasshopper |
| Melanoplus kennicottii | Grasshopper |
| Melanoplus montanus | Grasshopper |
| Melanoplus occidientalis | Grasshopper |
| Melanoplus oregonensis | Oregon Short-winged Grasshopper |
| Melanoplus oregonensis oregonensis | Oregon Short-winged Grasshopper |
| Melanoplus ruggelesi | Grasshopper |
| Melanoplus washingtonius | Grasshopper |
| Melanorhopala clavata | True Bug |
| Melanostigma pammelas | Pacific Softpout |
| Melanotrichus albocostatus | True Bug |
| Melanotrichus brindleyi | True Bug |
| Melanotrichus coagulatus | True Bug |
| Melanotrichus concolor | True Bug |
| Melanotrichus flavosparsus | True Bug |
| Melanotrichus leviculus | True Bug |
| Melanotrichus mistus | True Bug |
| Melanotrichus vestitus | True Bug |
| Melanotrichus virescens | True Bug |
| Melanotus longulus oregonensis | Brown Wireworm |
| Melasis rufipennis | False Click Beetle |
| Melasis tsugae | False Click Beetle |
| Meleoma dolicharthra | Green Lacewing |
| Meleoma emuncta | Green Lacewing |
| Meleoma schwarzi | Green Lacewing |
| Meleoma signoretti | Green Lacewing |
| Melicertum octocostatum | Jellyfish |
| Meligethes atratus | Pollen Beetle |
| Meligethes canadensis | Sap-Feeding Beetle |
| Meligethes cleominis | Sap-Feeding Beetle |
| Meligethes dauricus | Sap-Feeding Beetle |
| Meligethes nigrescens | Sap-Feeding Beetle |
| Melinna cristata | Polychaete Worm |
| Melinna elisabethae | Polychaete Worm |
| Melinopterus prodromus | Hide Beetle |
| Melissodes agilis | Bee |
| Melissodes bimatris | Bee |
| Melissodes communis | Bee |
| Melissodes lutulenta | Bee |
| Melissodes menuachus | Bee |
| Melissodes microsticta | Bee |
| Melissodes pallidisignatus | Bee |
| Melissodes rivalis | Bee |
| Melissodes saponellus | Bee |
| Melissodes semilupina | Bee |
| Melita oregonensis | Amphipod |
| Melitara dentata | Moth |
| Meloe barbarus | Oil Beetle |
| Meloe dianella | Oil Beetle |
| Meloe dianellus | Blister Beetle |
| Meloe impressus | Oil Beetle |
| Meloe niger | Blister Beetle |
| Meloe occultus | Oil Beetle |
| Meloe strigulosus | Oil Beetle |
| Meloe vandykei | Blister Beetle |
| Melphidipella macer | Amphipod |
| Melphisana bola | Amphipod |
| Mendicula ferruginosa | Rusty Axinopsid |
| Meotica pallens | Rove Beetle |
| Mercenaria mercenaria | Dosinia Clam |
| Mergellus albellus | Smew |
| Merhynchites bicolor bicolor | Leaf and Bud Weevil |
| Merhynchites bicolor cerdonis | Leaf and Bud Weevil |
| Merhynchites bicolor nigricephalus | Leaf and Bud Weevil |
| Merhynchites wickhami | Western Rose Curculio |
| Meriola californica | Sun Spider |
| Meriola decepta | Sun Spider |
| Merioptera sphagnorum | Bog Katydid |
| Meris suffusaria | Moth |
| Merluccius productus | Pacific Hake |
| Mermessus holdus | Spider |
| Mermessus paludosus | Spider |
| Mermessus taibo | Spider |
| Mermessus tridentatus | Sheetweb Spider |
| Mermessus trilobatus | Spider |
| Meroptera abditiva | Moth |
| Meroptera pravella | Lesser Aspen Webworm |
| Merragata hebroides | True Bug |
| Mesamia frigida | True Bug |
| Mesocapnia autumna | Stonefly |
| Mesocapnia oenone | Stonefly |
| Mesocapnia projecta | Stonefly |
| Mesocapnia variabilis | Stonefly |
| Mesochaetopterus taylor | Polychaete Worm |
| Mesogona subcuprea | Cutworm Moth |
| Mesoplodon carlhubbsi | Arch-Beaked Whale |
| Mesoplodon stejnegeri | Bering Sea Beaked Whale |
| Mesothea incertata | Day Emerald Moth |
| Mesothuria murrayi | Sea Cucumber |
| Mesovelia mulsanti | True Bug |
| Metacaprella anomala | Amphipod |
| Metacaprella ferresa | Amphipod |
| Metacaprella kennerlyi | Amphipod |
| Metaclisa marginalis | Desert Stink Beetle |
| Metacolpodes buchanani | Long-necked Ground Beetle |
| Metacrangon acclivis | Forked Spinyhead |
| Metacrangon spinosissima | Southern Spinyhead |
| Metacrangon variabilis | Deapsea Spinyhead |
| Metacyphocaris helgae | Amphipod |
| Metacyrba taeniola similis | Jumping Spider |
| Metanema determinata | Dark Metanema |
| Metanomus insidiosus | Glowing Click Beetle |
| Metaphidippus manni | Jumping Spider |
| Metaphoxus frequens | Amphipod |
| Metasychis disparidenta | Polychaete Worm |
| Metator nevadensis | Grasshopper |
| Metellina curtisi | Longjawed Orbweaver |
| Metellina mimetoides | Longjawed Orbweaver |
| Metellina segmentata | Longjawed Orbweaver |
| Metepeira foxi | Orbweaver |
| Metepeira grandiosa | Orbweaver |
| Metepeira palustris | Spider |
| Metocalea lindgreni | Rove Beetle |
| Metopobactrus pacificus | Sheetweb Spider |
| Metretopus borealis | Mayfly |
| Metridium exilis | Pink Clonal Anemone |
| Metrius contractus contractus | Ground Beetle |
| Metzneria paucipunctella | Moth |
| Mezira pacifica | True Bug |
| Mezium affine | Spider Beetle |
| Micaria aenea | Ground Spider |
| Micaria alpina | Ground Spider |
| Micaria coloradensis | Ground Spider |
| Micaria constricta | Ground Spider |
| Micaria foxi | Ground Spider |
| Micaria idana | Ground Spider |
| Micaria laticeps | Ground Spider |
| Micaria longipes | Ground Spider |
| Micaria longispina | Ground Spider |
| Micaria pulicaria | Ground Spider |
| Micaria riggsi | Ground Spider |
| Micaria rossica | Ground Spider |
| Micaria utahna | Ground Spider |
| Micracanthia bergrothi | True Bug |
| Micracanthia fennica | True Bug |
| Micracanthia humilis | True Bug |
| Micracanthia quadrimaculata | True Bug |
| Micraegialia pusilla | Hide Beetle |
| Micrathous brevis | Click Beetle |
| Microbregma emarginatum | Death-watch Beetle |
| Microbregma emarginatum emarginatum | Deathwatch Beetle |
| Microbregma emarginatum granicolle | Deathwatch Beetle |
| Microcara explanata | Marsh Beetle |
| Microcentrum rhombifolium | Greater Angle-Wing Katydid |
| Microciona primitiva | Sponge |
| Microcotyle sebastis | Parasite |
| Microcylloepus pusillus pusillus | Riffle Beetle |
| Microedus fenderi | Ocellate Rove Beetle |
| Microedus laticollis | Rove Beetle |
| Microedus porterae | Rove Beetle |
| Microedus rogersi | Rove Beetle |
| Microgadus proximus | Pacific Tomcod |
| Microhexura idahoana | Funnelweb Spider |
| Microhypnus striatulus | ctenicera |
| Microjassa boreopacifica | Amphipod |
| Microjassa litotes | Amphipod |
| Microlestes curtipennis | Flat-horned Ground Beetle |
| Microlestes linearis | Flat-horned Ground Beetle |
| Microlestes major | Ground Beetle |
| Microlestes nigrinus | Ground Beetle |
| Microlinyphia dana | Sheetweb Spider |
| Microlinyphia impigra | Sheetweb Spider |
| Microlinyphia mandibulata | Sheetweb Spider |
| Microlinyphia pusilla | Sheetweb Spider |
| Microlipus falli | Soft-Winged Flower Beetle |
| Microlipus moerens | Soft-winged Flower Beetle |
| Microlophium carnosum | True Bug |
| Micromalthus debilis | Telephone Beetle |
| Micromus posticus | Brown Lacewing |
| Micromus subanticus | Brown Lacewing |
| Micromus variegatus | Brown Lacewing |
| Micronereis nanaimoensis | Polychaete Worm |
| Microneta viaria | Sheetweb Spider |
| Micropeplus brunneus | Micropeplid Beetle |
| Micropeplus laticollis | Rove Beetle |
| Micropeplus punctatus | Rove Beetle |
| Micropeplus robustus | Micropeplid Beetle |
| Micropeplus sculptus | Rove Beetle |
| Micropeplus smetanai | Micropeplid Beetle |
| Micropeplus tesserula | Rove Beetle |
| Microphylellus adustus binotatus | True Bug |
| Microphysula ingersollii | Spruce Snail |
| Micropleustes nautiloides | Amphipod |
| Micropleustes nautilus | Amphipod |
| Micropora coriacea | Bryozoa |
| Microporella californica | Bryozoa |
| Microporella ciliata | Bryozoa |
| Microporella ciliata stellata | Bryozoa |
| Microporella cribrosa | Bryozoa |
| Microporella setiformis | Bryozoa |
| Microporella umbonata | Bryozoa |
| Microporella vibraculifera | Bryozoa |
| Microporus obliquus | True Bug |
| Microrhagus pectinatus | False Click Beetle |
| Microrhopala excavata cyanea | Tortoise Beetles and the Hispine |
| Microrhopala inermis | Leaf Beetle |
| Microrhopala vittata | Leaf Beetle |
| Microrhopala xerene | Tortoise Beetles and the Hispine |
| Microsiphoniella artemisiae | True Bug |
| Microsiphoniella oregonensis | True Bug |
| Microsporidium prosopium | Parasite |
| Microtheoris ophionalis | Yellow-veined Moth |
| Microtus oeconomus | Tundra Vole |
| Microtus oregoni | Creeping Vole |
| Microtus richardsoni | North American Water Vole |
| Microvelia buenoi | True Bug |
| Microvelia pulchella | True Bug |
| Micrura alaskensis | Ribbon Worm |
| Micrura verrilli | Ribbon Worm |
| Micrurapteryx occulta | Moth |
| Micrurapteryx salicifoliella | Willow Leafblotch Miner |
| Milneria minima | Cockle Clam |
| Mimetus hesperus | Mecicobothriid Spider |
| Mimoceps insignis | True Bug |
| Mimonectes gaussi | Amphipod |
| Mimoschinia rufofascialis | Rufous-banded Crambid Moth |
| Mindarus abietinus | True Bug |
| Mindarus obliquus | True Bug |
| Mindarus victoria | True Bug |
| Minoa murinata | Moth |
| Minuspio cirrifera | Polychaete Worm |
| Miodontiscus prolongatus | Elongate Carditid |
| Mioptachys flavicauda | Round Sand Beetle |
| Miscodera arctica | Bombardier Beetle |
| Mitromorpha carpenteri | Gastropod |
| Mniotype ducta | Cutworm Moth |
| Mniotype pallescens | Moth |
| Mocuellus larrimeri | True Bug |
| Mocuellus strictus | True Bug |
| Mocyta breviuscula | Rove Beetle |
| Mocyta fungi | Rove Beetle |
| Modiolus modiolus | Northern Horsemussel |
| Modiolus rectus | Straight Horsemussel |
| Mogulones crucifer | Weevil |
| Mohnia robusta | Sea Snail |
| Mola mola | Ocean Sunfish |
| Molamba biguttata | Minute Fungus Beetle |
| Molamba obesa | Minute Fungus Beetle |
| Molanna flavicornis | Caddisfly |
| Molpadia borealis | Sea Cucumber |
| Moluciba grandipennis | Rove Beetle |
| Mompha circumscriptella | Circumscript Mompha |
| Mompha conturbatella | Fireweed Mompha |
| Mompha deceptella | Moth |
| Mompha epilobiella | Moth |
| Mompha idaei | Moth |
| Mompha murtfeldtella | Moth |
| Mompha nancyae | Moth |
| Mompha sexstrigella | Moth |
| Mompha sturnipennella | Moth |
| Mompha terminella | Moth |
| Mompha unifasciella | Moth |
| Monalocoris americanus | True Bug |
| Monanchora alaskensis | Sponge |
| Monarthrum scutellare | Palm Seed Borer |
| Monochamus notatus | Northeastern Sawyer |
| Monochamus obtusus | Sawyer |
| Monochroa fragariae | Strawberry Crown Miner |
| Monochroa harrisonella | Moth |
| Monochroa placidella | Moth |
| Monocorophium acherusicum | Amphipod |
| Monocorophium californianum | Amphipod |
| Monocorophium carlottensis | Amphipod |
| Monocorophium insidiosum | Amphipod |
| Monoculodes brevirostris | Amphipod |
| Monoculodes catalskii | Amphipod |
| Monoculodes diamesus | Amphipod |
| Monoculodes latimanus | Amphipod |
| Monoculodes latissimanus | Amphipod |
| Monoculodes perditus | Amphipod |
| Monomorium pharaonis | Pharaoh Ant |
| Monopis dorsistrigella | Skunkback Monopis |
| Monopis laevigella | Moth |
| Monopis spilotella | Moth |
| Monopis weaverella | Moth |
| Monosynamma bohemanni | True Bug |
| Monotoma bicolor | Minute Clubbed Beetle |
| Monotoma fulvipes | Root-Eating Beetle |
| Monotoma longicollis | Minute Clubbed Beetle |
| Monotoma parallela | Root-Eating Beetle |
| Monotoma picipes | Minute Clubbed Beetle |
| Monoxia angularis | Purple Loosestrife Beetle |
| Monoxia consputa | Leaf Beetle |
| Monoxia grisea | Leaf Beetle |
| Monoxia sordida | Purple Loosestrife Beetle |
| Monticola solitarius | Blue Rock-Thrush |
| Moorebdella fervida | Freshwater Leech |
| Mooreobdella fervida | Hirudinoidea |
| Mopalia phorminx | Feathery Mopalia |
| Mordella albosuturalis | Tumbling Flower Beetle |
| Mordella atrata atrata | Tumbling Flower Beetle |
| Mordella brevistylis | Tumbling Flower Beetle |
| Mordella grandis | Tumbling Flower Beetle |
| Mordella hubbsi | Tumbling Flower Beetle |
| Mordella quadripunctata | Tumbling Flower Beetle |
| Mordellaria borealis | Tumbling Flower Beetle |
| Mordellina pustulata | Tumbling Flower Beetle |
| Mordellistena aspersa | Tumbling Flower Beetle |
| Mordellistena downesi | Tumbling Flower Beetle |
| Mordellistena gigas | Tumbling Flower Beetle |
| Mordellistena liljebladi | Tumbling Flower Beetle |
| Mordellistena morula | Tumbling Flower Beetle |
| Mordellistena nunenmacheri | Tumbling Flower Beetle |
| Mordellistena pustulata | Tumbling Flower Beetle |
| Mordellistena scapularis | Tumbling Flower Beetle |
| Mordellistena vilis | Tumbling Flower Beetle |
| Mordellochroa scapularis | Tumbling Flower Beetle |
| Mordwilkoja vagabunda | True Bug |
| Morone saxatilis | Striped Bass |
| Moselia infuscata | Stonefly |
| Motacilla cinerea | Gray Wagtail |
| Motacilla tschutschensis | Eastern Yellow Wagtail |
| Motschulskium sinuatocolle | Feather-Winged Beetle |
| Mucronella major | Bryozoa |
| Mucronella ventricosa | Bryozoa |
| Mulsantina hudsonica | Lady Beetle |
| Munidopsis albatrossae | Crab |
| Munidopsis antoniii | Crab |
| Munidopsis granosicorium | Crab |
| Munidopsis quadrata | Crab |
| Munna stephenseni | Isopod |
| Muscaphis escherichi | True Bug |
| Musculus discors | Discordant Mussel |
| Musculus glacialis | Date Mussel |
| Musculus niger | Black Mussel |
| Musculus taylori | Tiny Bearded Mussel |
| Myathropa florea | Flower Fly |
| Mycale bamfieldense | Sponge |
| Mycale bellabellensis | Sponge |
| Mycale hispida | Sponge |
| Mycale lingua | Sponge |
| Mycale lobata | Sponge |
| Mycale loveni | Sponge |
| Mycale macginitiei | Sponge |
| Mycale richardsoni | Sponge |
| Mycetaea subterranea | Handsome Fungus Beetle |
| Mycetochara analis | Darkling Beetle |
| Mycetochara fraterna | Comb-clawed Beetle |
| Mycetochara procera | Darkling Beetle |
| Mycetophagus californicus | Hairy Fungus Beetle |
| Mycetophagus distinctus | Hairy Fungus Beetle |
| Mycetophagus pluriguttatus | Hairy Fungus Beetle |
| Mycetophagus quadriguttatus | Spotted Hairy Fungus Beetle |
| Mycetophagus tenuifasciatus | Hairy Fungus Beetle |
| Mycetoporus americanus | Rove Beetle |
| Mycetoporus bipunctatus | Rove Beetle |
| Mycetoporus brunneus | Rove Beetle |
| Mycetoporus discalis | Rove Beetle |
| Mycetoporus neotomae | Crab-like Rove Beetle |
| Mycetoporus nigrans | Rove Beetle |
| Mycetoporus pacificus | Rove Beetle |
| Mycetoporus pictus | Rove Beetle |
| Mycetoporus punctatissimus | Rove Beetle |
| Mycetoporus punctulatus | Rove Beetle |
| Mycetoporus rufohumeralis | Rove Beetle |
| Mycetoporus rugosus | Rove Beetle |
| Mycetoporus smetanai | Rove Beetle |
| Mycetoporus splendidus | Rove Beetle |
| Mychocerus discretus | Minute Bark Beetle |
| Mycterus concolor | Palm and Flower Beetle |
| Myelopsis alatella | Moth |
| Myelopsis subtetricella | Moth |
| Myllaena audax | Rove Beetle |
| Myllaena decreta | Rove Beetle |
| Myllaena fenyesi | Rove Beetle |
| Myllaena insomnis | Rove Beetle |
| Myonera garretti | Cuspidaria Clam |
| Myosoma spinosa | Entoproct |
| Myotis thysanodes | Fringed Myostis |
| Myotis volans | Long-Legged Myotis |
| Myriozoum coarctatum | Bryozoa |
| Myriozoum subgracile | Bryozoa |
| Myriozoum tenue | Bryozoa |
| Myrmecocephalus arizonicus | Rove Beetle |
| Myrmecocystus testaceus | Ant |
| Myrmica brevispinosa | Ant |
| Myrmica crassirugis | Ant |
| Myrmica fracticornis | Ant |
| Myrmica incompleta | Ant |
| Myrmica latifrons | Ant |
| Myrmica lobifrons | Ant |
| Myrmica nearctica | Ant |
| Myrmoecia lugubris | Rove Beetle |
| Mysella pedroana | San Pedro Mysella |
| Mystacides sepulchralis | Caddisfly |
| Mythimna yukonensis | Cutworm Moth |
| Mythoplastoides erectus | Sheetweb Spider |
| Mytilimeria nuttalli | Bladderclam |
| Mytilus edulis | Atlantic Blue Mussel |
| Mytilus galloprovincialis | Mediterranean Blue Mussel |
| Myxicola aesthetica | Petit Slime-Tube Feather-Duster |
| Myxidium japonicum | Parasite |
| Myxidium macrocheili | Parasite |
| Myxidium theragrae | Parasite |
| Myxilla behringensis | Sponge |
| Myxobilatus gasterostei | Parasite |
| Myxobolus aureatus | Parasite |
| Myxobolus microthecus | Parasite |
| Myzaphis rosarum | True Bug |
| Myzia interrupta | Lady Beetle |
| Myzocallis bellus | True Bug |
| Myzocallis carpini | True Bug |
| Myzocallis castanicola | True Bug |
| Myzocallis coryli | True Bug |
| Myzocallis multisetis | True Bug |
| Myzocallis punctatus | True Bug |
| Myzocallis spinosa | True Bug |
| Myzocallis walshii | True Bug |
| Myzodium knowltoni | True Bug |
| Myzodium modestum | True Bug |
| Myzostoma pseudogigas | Polychaete Worm |
| Myzus antirrhinii | True Bug |
| Myzus ascalonicus | True Bug |
| Myzus cerasi | True Bug |
| Myzus certus | True Bug |
| Myzus ligustri | True Bug |
| Myzus lythri | True Bug |
| Myzus nicotianae | True Bug |
| Myzus ornatus | True Bug |
| Myzus polaris | True Bug |
| Nabicula americolimbata | True Bug |
| Nabicula flavomarginata | True Bug |
| Nabicula nigrovittata nearctica | True Bug |
| Nabicula propinqua | True Bug |
| Nabicula vanduzeei | True Bug |
| Nabis alternatus alternatus | True Bug |
| Nabis alternatus uniformis | True Bug |
| Nabis inscriptus | True Bug |
| Nabis roseipennis | True Bug |
| Nabis rufusculus | True Bug |
| Nacerdes melanura | Wharf Borer |
| Nadabius eigenmanni | Centipede |
| Naineris dendritica | Tunnel-Tail Orbit Worm |
| Naineris quadricuspida | Polychaete Worm |
| Naineris uncinata | Polychaete Worm |
| Najna plumulosum | Amphipod |
| Najna rugosum | Amphipod |
| Najna setosum | Amphipod |
| Namunaria pacifica | Cylindrical Bark Beetle |
| Nannobrachium ritteri | Broadfin Lanternfish |
| Nanobius serricollis | Ant-loving Beetle |
| Nansenia candida | Bluethroat Argentine |
| Naobranchia occidentalis | Parasite |
| Nasonovia acyrthosiphon | True Bug |
| Nasonovia alpina | True Bug |
| Nasonovia borealis | True Bug |
| Nasonovia castelleiae | True Bug |
| Nasonovia compositellae nigra | True Bug |
| Nasonovia cynosbati | True Bug |
| Nasonovia essigi | True Bug |
| Nasonovia grossa | True Bug |
| Nasonovia heucherae | True Bug |
| Nasonovia houghtonensis similis | True Bug |
| Nasonovia muesebecki | True Bug |
| Nasonovia polemonii | True Bug |
| Nasonovia ribisnigri | True Bug |
| Nasonovia takala | True Bug |
| Nasonovia wahinkae wahinkae | True Bug |
| Nasonovia williamsi | True Bug |
| Nassipa hoppingi | False Flower Beetle |
| Nathalis iole | Dainty Sulphur |
| Nauclidas nigra | Cockroach |
| Naucrates ductor | Pilotfish |
| Nautichthys robustus | Shortmast Sculpin |
| Neadmete modesta | Modest Admete |
| Neaeromya compressa | Compressed Montacutid |
| Neaeromya rugifera | Wrinkled Montacutid |
| Neanthophylax mirificus | Elderberry Longhorn Beetle |
| Neanthophylax tenebrosus nigrolineatus | Longhorned Beetle |
| Nearchaster aciculosus | Sea Star |
| Nearchaster variabilis | Sea Star |
| Nearctaphis bakeri | True Bug |
| Nearctaphis californica | True Bug |
| Nearctaphis crataegifoliae | True Bug |
| Nearctaphis crataegifoliae occidentalis | True Bug |
| Nearctaphis kachena | True Bug |
| Nearctaphis sclerosa | True Bug |
| Nearctaphis sensoriata | True Bug |
| Nearctaphis yohoensis | True Bug |
| Neatus tenebrioides | Dune Beetle |
| Nebria acuta acuta | Ground Beetle |
| Nebria campbelli | Ground Beetle |
| Nebria charlottae | Ground Beetle |
| Nebria crassicornis intermedia | Gazelle Beetle |
| Nebria gebleri cascadensis | Gazelle Beetle |
| Nebria gyllenhali castanipes | Gazelle Beetle |
| Nebria haida | Ground Beetle |
| Nebria lituyae | Gazelle Beetle |
| Nebria louiseae | Ground Beetle |
| Nebria meanyi sylvatica | Ground Beetle |
| Nebria metallica | Gazelle Beetle |
| Nebria nivalis nivalis | Beetle |
| Nebria piperi | Ground Beetle |
| Nebrioporus macronychus | Predaceous Diving Beetle |
| Necrobia ruficollis | Redshouldered Ham Beetle |
| Necrobia rufipes | Redlegged Ham Beetle |
| Necrobia violacea | Checkeredbeetle |
| Necrodes surinamensis | Carrion Beetle |
| Nectoliparis pelagicus | Tadpole Snailfish |
| Nectonemertes mirabilis | Ribbon Worm |
| Nectopsyche lahontanensis | Caddisfly |
| Necydalis cavipennis | Elderberry Longhorn Beetle |
| Nedra stewarti | Moth |
| Negastrius colon | ctenicera |
| Negastrius dispersus | Click Beetle |
| Negastrius extricatus | Click Beetle |
| Negastrius gentilis | Click Beetle |
| Negastrius manki | Click Beetle |
| Negastrius ornatus | ctenicera |
| Negastrius pectoralis | Click Beetle |
| Negastrius stibicki | ctenicera |
| Neilonella brunnea | Clam |
| Nemadus decipiens | Round Fungus Beetle |
| Nemadus pusio | Small Carrion Beetle |
| Nemanthus californicus | Sea Anemone |
| Nemapogon acapnopennella | Moth |
| Nemapogon auropulvella | Moth |
| Nemapogon cloacella | Moth |
| Nemapogon granella | European Grain Moth |
| Nemapogon tylodes | Moth |
| Nemapogon variatella | Moth |
| Nematodirus davtiani | Parasite |
| Nematodirus filicollis | Parasite |
| Nematodirus spathiger | Parasite |
| Nematus currani | Cottonwood Sawfly |
| Nematus ribesi | Gooseberry Sawfly |
| Nemocestes horni | White-fringed Weevil |
| Nemocestes incomptus | Woods Weevil |
| Nemocestes montanus | Snout Beetle |
| Nemocestes puncticollis | Snout Beetle |
| Nemocestes tuberculatus | Snout Beetle |
| Nemognatha lutea dichroa | Orange Blister Beetle |
| Nemognatha soror | Blister Beetle |
| Nemophora bellela | Moth |
| Nemoria glaucomarginaria | Moth |
| Nemotaulius hostilis | Limnephilid Caddisfly |
| Nemoura arctica | Stonefly |
| Nemozoma punctulatum | Bark-gnawing Beetle |
| Neoaliturus tenellus | True Bug |
| Neoalosterna rubida | Elderberry Longhorn Beetle |
| Neoamphitrite edwardsi | Polychaete Worm |
| Neoamphitrite robusta | Robust Spaghetti-Worm |
| Neoantistea agilis | Hahniid Spider |
| Neoantistea gosiuta | Hahniid Spider |
| Neoantistea magna | Hahniid Spider |
| Neobisnius jucundus | Rove Beetle |
| Neobisnius senilis | Rove Beetle |
| Neobolitobius varians | Crab-like Rove Beetle |
| Neoborella xanthenes | True Bug |
| Neochthebius vandykei | Minute Moss Beetle |
| Neoclypeodytes ornatellus | Predaceous Diving Beetle |
| Neoclytus balteatus | Elderberry Longhorn Beetle |
| Neoclytus conjunctus | Elderberry Longhorn Beetle |
| Neoclytus leucozonus leucozonus | Beetle |
| Neoclytus muricatulus muricatulus | Longhorned Beetle |
| Neoclytus provoanus | Longhorned Beetle |
| Neocoelidia lineata | True Bug |
| Neocrangon abyssorum | Abyssal Crangon |
| Neocrangon communis | Grey Shrimp |
| Neocrangon resima | Shrimp |
| Neocrepidodera robusta | Skeletonizing Leaf Beetles and Flea Beetle |
| Neocyamus physeteris | Amphipod |
| Neodactria caliginosellus | Corn Root Webworm |
| Neodactria luteolellus | Mottled Grass-veneer |
| Neodactria murellus | Moth |
| Neoechinorhynchus cristatus | Parasite |
| Neoechinorhynchus cylindratus | Parasite |
| Neoechinorhynchus rutili | Parasite |
| Neoechinorhynchus salmonis | Parasite |
| Neoeocatops decipiens | Round Fungus Beetle |
| Neogalerucella pusilla | Purple Loosestrife Beetle |
| Neohaemonia nigricornis | Aquatic Leaf Beetle |
| Neohela intermedia | Amphipod |
| Neohelicometra sebastis | Parasite |
| Neoheterocerus gnatho | Variegated Mud-Loving Beetle |
| Neohypdonus gentilis | ctenicera |
| Neohypdonus musculus | ctenicera |
| Neohypdonus nibleyi | Click Beetle |
| Neohypdonus recavus | Click Beetle |
| Neohypdonus tumescens | ctenicera |
| Neohypnus fragilis | Rove Beetle |
| Neohypnus hamatus | Crab-like Rove Beetle |
| Neohypnus obscurus | Crab-like Rove Beetle |
| Neohypnus picipennis | Rove Beetle |
| Neokolla atropunctata | True Bug |
| Neokolla confluens | True Bug |
| Neokolla hieroglyphica | True Bug |
| Neokolla uhleri | True Bug |
| Neolebouria tinkerbellae | Parasite |
| Neolepidapedon pugetense | Parasite |
| Neolepidapedon sebastisci | Parasite |
| Neoleprea japonica | Polychaete Worm |
| Neoleprea spiralis | Polychaete Worm |
| Neolepton salmonea | Clam |
| Neoligia albirena | Cutworm Moth |
| Neoligia lancea | Cutworm Moth |
| Neoligia lillooet | Cutworm Moth |
| Neoligia tonsa | Cutworm Moth |
| Neomyzus circumflexus | True Bug |
| Neon nelli | Jumping Spider |
| Neon pixii | Jumping Spider |
| Neon reticulatus | Jumping Spider |
| Neopachylopus aeneipunctatus | Clown Beetle |
| Neopachylopus sulcifrons | Clown Beetle |
| Neopetrosia vanilla | Sponge |
| Neophilaenus lineatus | True Bug |
| Neophylax occidentalis | Caddisfly |
| Neophylax rickeri | Caddisfly |
| Neophylax splendens | Caddisfly |
| Neophyllura arbuti | True Bug |
| Neophyllura arctostaphyli | True Bug |
| Neophytobius cavifrons | Minute Seed Weevil |
| Neoporus superioris | Predaceous Diving Beetle |
| Neopristilophus maurus | Glowing Click Beetle |
| Neortholomus scolopax | True Bug |
| Neosabellaria cementarium | Cemented Sandmason Tubeworm |
| Neoscona arabesca | Arabesque Orbweaver |
| Neoscona pratensis | Spotted Orbweaver |
| Neoscopelus macrolepidotus | Glowingfish |
| Neoscutopterus angustus | Predaceous Diving Beetle |
| Neoscutopterus horni | Predacious Diving Beetle |
| Neoscutopterus hornii | Predaceous Diving Beetle |
| Neospondylis upiformis | Elderberry Longhorn Beetle |
| Neosuris castanea | True Bug |
| Neotamias ruficaudus | Red-Tailed Chipmunk |
| Neotelphusa praefixa | Moth |
| Neothetalia canadiana | Rove Beetle |
| Neothetalia columbiana | Rove Beetle |
| Neothetalia nimia | Rove Beetle |
| Neothetalia pallitarsis | Rove Beetle |
| Neothetalia smetanai | Rove Beetle |
| Neothremma alicia | Caddisfly |
| Neothremma didactyla | Caddisfly |
| Neotrapezium liratum | Quadrate Trapezium |
| Neotrypaea gigas | Giant Ghost Shrimp |
| Neottiglossa trilineata | True Bug |
| Neottiglossa tumidifrons | True Bug |
| Neottiura bimaculata | Cobweb Weaver |
| Neozoogonus californicus | Parasite |
| Nephelopsis obscura | Freshwater Ribbon Leech |
| Nephtys brachycephala | Polychaete Worm |
| Nephtys caecoides | Polychaete Worm |
| Nephtys californiensis | Polychaete Worm |
| Nephtys ciliata | Polychaete Worm |
| Nephtys cornuta cf franciscana | Polychaete Worm |
| Nephtys ferruginea | Polychaete Worm |
| Nephtys longosetosa | Polychaete Worm |
| Nephtys punctata | Polychaete Worm |
| Nephtys rickettsi | Polychaete Worm |
| Nephus ornatus naviculatus | Lady Beetle |
| Neptunea verkruzeni | Whelk |
| Nepytia canosaria | False Hemlock Looper Moth |
| Nepytia freemani | Moth |
| Nereis eakini | Polychaete Worm |
| Nereis grubei | Polychaete Worm |
| Nereis limnicola | Polychaete Worm |
| Nereis natans | Polychaete Worm |
| Nereis paucidentata | Polychaete Worm |
| Nereis pelagica | Polychaete Worm |
| Nereis virens | Polychaete Worm |
| Nereis wailesi | Polychaete Worm |
| Neriene radiata | Filmy Dome Spider |
| Nerilla antennata | Polychaete Worm |
| Nerilla digitata | Polychaete Worm |
| Nerilla inopinata | Polychaete Worm |
| Nesovitrea binneyana | Blue Glass |
| Netastoma japonicum | Piddock Clam |
| Netastoma rostratum | Beacked Piddock |
| Neureclipsis bimaculata | Caddisfly |
| Neurocolpus longirostris | True Bug |
| Nezumia stelgidolepis | California Grenadier |
| Nicocles dives | Robber Fly |
| Nicocles pollinosus | Robber Fly |
| Nicocles utahensis | Robber Fly |
| Nicolea zostericola | Polychaete Worm |
| Nicomache lumbricalis | Polychaete Worm |
| Nicrophorus guttula | Carrion Beetle |
| Nicrophorus investigator | Carrion Beetle |
| Nicrophorus nigrita | Carrion Beetle |
| Niditinea fuscella | European House Moth |
| Niditinea orleansella | Moth |
| Nineta gravida | Green Lacewing |
| Ninoe gemmea | Polychaete Worm |
| Nipponentomon bifidum | Protura |
| Nipponentomon kevani | Protura |
| Nippononebria campbelli | Ground Beetle |
| Nippononebria virescens | Gazelle Beetle |
| Niptus hololeucus | Golden Spider Beetle |
| Nites atrocapitella | Moth |
| Nites betulella | Black-dotted Birch Leaftier |
| Nitidella gouldi | Gasropod |
| Nitidiscala caamanoi | Tabulate Wentletrap |
| Nitidiscala sawinae | Wentletrap |
| Nitidolimonius resplendens | Resplendent Click Beetle |
| Nitidolimonius weidtii | Click Beetle |
| Nitidotachinus lanei | Rove Beetle |
| Nitidotachinus tachyporoides | Crab-like Rove Beetle |
| Nitidula bipunctata | Sap-Feeding Beetle |
| Nitidula carnaria | Pollen Beetle |
| Nitidula nigra | Pollen Beetle |
| Nitidula rufipes | Pollen Beetle |
| Nitidula ziczac | Pollen Beetle |
| Nitops pallipennis | Sap-feeding Beetle |
| Nitzschia quadritestes | Parasite |
| Niveotectura funiculata | Corded White Limpet |
| Nixe simplicioides | Mayfly |
| Noctuocoris fumidus | True Bug |
| Nodocion eclecticus | Ground Spider |
| Nodocion mateonus | Ground Spider |
| Nodocion rufithoracicus | Ground Spider |
| Nodocion voluntarius | Ground Spider |
| Nola cilicoides | Blurry-patched Nola |
| Nola cucullatella | Moth |
| Nolella stipata | Bryozoa |
| Nomius pygmaeus | Ground Beetle |
| Nonlygus nubilatus | True Bug |
| Nopoiulus kochii | Millipede |
| Nordenskioeldia columbiana | Rove Beetle |
| Nordenskioldia columbiana | Rove Beetle |
| Norvellina chenopodii | True Bug |
| Norvellina columbiana | True Bug |
| Norvellina rubida | True Bug |
| Norvellina scitula | True Bug |
| Norvellina seminuda | True Bug |
| Nosodendron californicum | Wounded-Tree Beetle |
| Notacanthus chemnitzi | Largescale Tapirfish |
| Notaris aethiops | Waterhyacinth Weevil |
| Notaris bimaculatus | Snout Beetle |
| Notaris puncticollis | Waterhyacinth Weevil |
| Nothodelphax guentheri | True Bug |
| Notiodes punctatus | Waterhyacinth Weevil |
| Notiophilus aquaticus | Gazelle Beetle |
| Notiophilus borealis | Gazelle Beetle |
| Notiophilus directus | Gazelle Beetle |
| Notiophilus intermedius | Gazelle Beetle |
| Notiophilus nitens | Gazelle Beetle |
| Notiophilus semistriatus | Gazelle Beetle |
| Notiophilus simulator | Gazelle Beetle |
| Notocelia illotana | Moth |
| Notocelia purpurissatana | Moth |
| Notocelia rosaecolana | Doubleday's Notocelia |
| Notodonta pacifica | Moth |
| Notodonta scitipennis | Finned-willow Prominent |
| Notodonta torva | Northern Finned Prominent |
| Notolepis risso | White Barracudina |
| Notomastus giganteus | Polychaete Worm |
| Notomastus lineatus | Polychaete Worm |
| Notomastus tenuis | Thread Sludgeworm |
| Notomastus variegatus | Polychaete Worm |
| Notonecta borealis | True Bug |
| Notonecta spinosa | True Bug |
| Notonecta undulata | True Bug |
| Notonecta unifasciata andersoni | True Bug |
| Notophyllum imbricatum | Polychaete Worm |
| Notoplana atomata | Flatworm |
| Notoproctus pacificus | Polychaete Worm |
| Notopygos labiata | Polychaete Worm |
| Notorynchus cepedianus | Sevengill Shark |
| Notoscopelus japonicus | Spiny Lanternfish |
| Notoxus cavicornis | Antlike Flower Beetle |
| Notoxus pictus | Antlike Flower Beetle |
| Notoxus robustus | Monoceros Beetle |
| Notoxus schwarzi | Antlike Flower Beetle |
| Notoxus serratus | Monoceros Beetle |
| Notropis atherinoides | Emerald Shiner |
| Notropis hudsonius | Spottail Shiner |
| Novalena intermedia | Funnel Weaver |
| Novelsis athlophora | Carpet Beetle |
| Novelsis perplexa | Carpet Beetle |
| Novobranchus pacificus | Polychaete Worm |
| Nucula carlottensis | Clam |
| Nuculana cellulita | Fine-Lined Nutclam |
| Nuculana extenuata | Clam |
| Nuculana hamata | Clam |
| Nuculana penderi | Sharp-Point Nutclam |
| Nuculaspis californica | True Bug |
| Nudobius cephalus | Crab-like Rove Beetle |
| Nudobius pugetanus | Rove Beetle |
| Numenius madagascariensis | Far Eastern Curlew |
| Numenius tahitiensis | Bristle-Thighed Curlew |
| Nutricola lordi | Lord Dwarf-Venus |
| Nutricola tantilla | Purple Dwarf-Venus |
| Nybelinia surmenicola | Parasite |
| Nycteus infumatus | Plate-thigh Beetle |
| Nycteus punctulatus | Plate-thigh Beetle |
| Nycteus testaceus | Plate-thigh Beetle |
| Nyctibora noctivaga | Cockroach |
| Nyctiophylax affinis | Caddisfly |
| Nyctiophylax moestus | Caddisfly |
| Nysius angustatus | True Bug |
| Nysius fuscovittatus | True Bug |
| Nysius niger | True Bug |
| Nysius paludicola | True Bug |
| Nysius raphanus | True Bug |
| Nysius tenellus | True Bug |
| Nysius thymi | True Bug |
| Oaphantes sp. | Sheetweb Spider |
| Obelia dichotoma | Jellyfish |
| Obelia longissima | Jellyfish |
| Oberea quadricallosa | Twig Girdling Beetle |
| Oberea schaumii | Twig Girdling Beetle |
| Obtusicauda artemisicola | True Bug |
| Obtusicauda coweni | True Bug |
| Obtusicauda filifoliae | True Bug |
| Obtusicauda frigidae | True Bug |
| Ocalea vancouveri | Rove Beetle |
| Occidentalia comptulatalis | Moth |
| Oceanapia n. sp. | Sponge |
| Ochodaeus luscinus | Scarab Beetle |
| Ochotona collaris | Collared Pika |
| Ochromolopis ramapoella | Moth |
| Ochrotrichia stylata | Caddisfly |
| Ochthebius bisinuatus | Minute Moss Beetle |
| Ochthebius borealis | Minute Moss Beetle |
| Ochthebius brevipennis | Minute Moss Beetle |
| Ochthebius costatellus | Minute Moss Beetle |
| Ochthebius cribricollis | Minute Moss Beetle |
| Ochthebius discretus | Minute Moss Beetle |
| Ochthebius interruptus | Minute Moss Beetle |
| Ochthebius kaszabi | Minute Moss Beetle |
| Ochthebius lecontei | Minute Moss Beetle |
| Ochthebius lineatus | Minute Moss Beetle |
| Ochthebius marinus | Minute Moss Beetle |
| Ochthebius mimicus | Minute Moss Beetle |
| Ochthebius rectus | Minute Moss Beetle |
| Ochthephilum fracticorne | Spiny-legged Rove Beetle |
| Ochthephilus biimpressus | Spiny-legged Rove Beetle |
| Ochthephilus columbiensis | Spiny-legged Rove Beetle |
| Ochthephilus forticornis | Rove Beetle |
| Ochthephilus planus | Rove Beetle |
| Ocnerostoma piniariella | Moth |
| Ocosingo borlus | Amphipod |
| Octoglena anura | Millipede |
| Octomacrum lanceatum | Parasite |
| Octomacrum microconfibula | Parasite |
| Octospinifer macilentus | Parasite |
| Octotemnus laevis | Minute Tree-Fungus Beetle |
| Ocypus aeneocephalus | Large Rove Beetle |
| Odiellus pictus | Harvestman |
| Odontopyxis trispinosa | Pygmy Poacher |
| Odontosia elegans | Prominent |
| Odontosphindus clavicornis | Cryptic Slime Mold Beetle |
| Odontosyllis parva | Polychaete Worm |
| Odontosyllis phosphorea | Polychaete Worm |
| Odostomia angularis | Clam Sucker |
| Odostomia barkleyensis | Clam Sucker |
| Odostomia canfieldi | Clam Sucker |
| Odostomia cassandra | Clam Sucker |
| Odostomia columbiana | Clam Sucker |
| Odostomia cypria | Clam Sucker |
| Odostomia deliciosa | Clam Sucker |
| Odostomia hypatia | Clam Sucker |
| Odostomia kennerleyi | Clam Sucker |
| Odostomia nuciformis | Clam Sucker |
| Odostomia pathologic | Clam Sucker |
| Odostomia quadrae | Clam Sucker |
| Odostomia sitkaensis | Clam Sucker |
| Odostomia skidegatensis | Clam Sucker |
| Odostomia spreadboroughi | Clam Sucker |
| Odostomia stephensae | Clam Sucker |
| Odostomia stephensi | Gastropod |
| Odostomia tenuisculpta | Clam Sucker |
| Odostomia valdezi | Clam Sucker |
| Odostomia vancouverensis | Clam Sucker |
| Odostomia youngi | Clam Sucker |
| Oecanthus californicus californicus | Tree Cricket |
| Oecetis immobilis | Caddisfly |
| Oecetis ochracea | Caddisfly |
| Oeciacus vicarius | True Bug |
| Oecleus obtusus | True Bug |
| Oecleus venosus | True Bug |
| Oeclidius brickellus | True Bug |
| Oedaleonotus enigma | Valley Grasshopper |
| Oedothorax alascensis | Spider |
| Oedothorax trilobatus | Spider |
| Oegoconia novimundi | Four-spotted Yellowneck Moth |
| Oeneis alberta alberta | Alberta Arctic |
| Oeneis jutta | Jutta Arctic |
| Oeneis jutta ridingiana | Jutta Arctic |
| Oeneis melissa atlinensis | Melissa Arctic |
| Oeneis polixenes brucei | Polixenes Arctic |
| Oeneis polixenes luteus | Polixenes Arctic |
| Oeneis polixenes yukonensis | Polixenes Arctic |
| Oeneis rosovi | Rosov's Arctic |
| Oenopota bicarinata | Gastropod |
| Oenopota crebricostata | Gastropod |
| Oenopota decussata | Gastropod |
| Oenopota excurvata | Gastropod |
| Oenopota fidicula | Marine Snail |
| Oenopota levidensis | Gastropod |
| Oenopota maurellei | Gastropod |
| Oenopota sculpturata | Gastropod |
| Oenopota solida | Gastropod |
| Oenopota tabulata | Table Lora |
| Oesophagostomum venulosum | Parasite |
| Oestlundiella flava | True Bug |
| Ohlertidion ohlerti | Spider |
| Oidaematophorus balsamorrhizae | Balsamroot Plume Moth |
| Oidaematophorus brucei | Moth |
| Oidaematophorus castor | Castor’s Plume Moth |
| Oidaematophorus cineraceus | Sagebrush Plume Moth |
| Oidaematophorus downesi | Downes's Plume Moth |
| Oidaematophorus eupatorii | Eupatorium Plume Moth |
| Oidaematophorus grisescens | Wormwood Plume Moth |
| Oidaematophorus mathewianus | Yarrow Leaf Plume Moth |
| Oidaematophorus occidentalis | Western Plume Moth |
| Oidaematophorus phaceliae | Phacelia Plume Moth |
| Oidaematophorus rileyi | Riley's Plume Moth |
| Okanagana lurida | Cicada |
| Okanagana oregona | Cicada |
| Okanagana ornata | Cicada |
| Okanagana vanduzeei | Cicada |
| Okenia vancouverensis | Vancouver's Okenia |
| Olethreutes appendiceum | Serviceberry Leafroller |
| Olethreutes astrologana | The Astronomer Moth |
| Olethreutes baccatana | Moth |
| Olethreutes bipartitana | Divided Olethreutes |
| Olethreutes bowmanana | Moth |
| Olethreutes buckellana | Moth |
| Olethreutes carolana | Moth |
| Olethreutes coruscana | Moth |
| Olethreutes costimaculana | Moth |
| Olethreutes deprecatorius | Moth |
| Olethreutes fasciatana | Moth |
| Olethreutes galaxana | Moth |
| Olethreutes glaciana | Moth |
| Olethreutes heinrichana | Moth |
| Olethreutes inquietana | Moth |
| Olethreutes mengelana | Moth |
| Olethreutes metallicana | Moth |
| Olethreutes minaki | Moth |
| Olethreutes nordeggana | Moth |
| Olethreutes olivaceana | Olivaceous Olethreutes |
| Olethreutes permundana | Raspberry Leafroller |
| Olethreutes polluxana | Moth |
| Olethreutes punctanum | Moth |
| Olethreutes quadrifidum | Moth |
| Olethreutes schulziana | Moorland Olethreutes |
| Olethreutes septentrionana | Moth |
| Olethreutes trinitana | Moth |
| Olethreutes turfosana | Moth |
| Oliarus beirnei | True Bug |
| Oliarus coconinus | True Bug |
| Oliarus dondonius | True Bug |
| Oliarus exoptatus | True Bug |
| Oliarus zyxus | True Bug |
| Olibrus rufipes | Shining Flower Beetle |
| Oligia rampartensis | Cutworm Moth |
| Oligia rampartensis | Moth |
| Oligia tusa | Cutworm Moth |
| Oligia tusa | Moth |
| Oligia violacea | Moth |
| Oligochinus lighti | Amphipod |
| Oligocottus rimensis | Saddleback Sculpin |
| Oligoloophus tridens | Harvestman |
| Oligomerus crestonensis | Deathwatch Beetle |
| Oligophlebodes mostbento | Caddisfly |
| Oligophlebodes ruthae | Caddisfly |
| Olisthaerus megacephalus | Rove Beetle |
| Olophrum boreale | Ocellate Rove Beetle |
| Olophrum consimile | Ocellate Rove Beetle |
| Olophrum leechi | Rove Beetle |
| Olophrum rotundicolle | Rove Beetle |
| Olophrum stouti | Rove Beetle |
| Omalium algarum | Rove Beetle |
| Omalium foraminosum | Rove Beetle |
| Omalium rivulare | Ocellate Rove Beetle |
| Omanonabis lovetti | True Bug |
| Omias erectus | Snout Beetle |
| Omias minor | Snout Beetle |
| Omias saccatus | Snout Beetle |
| Omonadus floralis | Antlike Flower Beetle |
| Omonadus formicarius | pseudo |
| Omophoita cyanipennis octomaculata | Beetle |
| Omophron ovale | Ground Beetle |
| Omosita discoidea | Pollen Beetle |
| Omphalapion hookerorum | Pear-shaped Weevil |
| Omus dejeanii | Greater Night-stalking Tiger Beetle |
| Onchidoris muricata | Sharp-pointed Dorid |
| Oncopsis abietis | True Bug |
| Oncopsis albicollis | True Bug |
| Oncopsis californica | True Bug |
| Oncopsis cinctifrons | True Bug |
| Oncopsis citra | True Bug |
| Oncopsis crispae | True Bug |
| Oncopsis ferrosa | True Bug |
| Oncopsis incidens | True Bug |
| Oncopsis interior | True Bug |
| Oncopsis juno | True Bug |
| Oncopsis marilynae | True Bug |
| Oncopsis minor | True Bug |
| Oncopsis monticola | True Bug |
| Oncopsis prolixa | True Bug |
| Oncopsis sobria | True Bug |
| Oncopsis tenuifoliae | True Bug |
| Oncopsis tristis | True Bug |
| Oncopsis variabilis | True Bug |
| Oncorhynchus clarkii clarkii | Coastal Cutthroat Trout |
| Oneirodes acanthias | Pacific Dreamer |
| Oneirodes bulbosus | Bulbous Dreamer |
| Ontholestes cingulatus | Rove Beetle |
| Onthophagus hecate hecate | Scarab Beetle |
| Onthophagus nuchicornis | Rainbow Scarab |
| Onuphis elegans | Polychaete Worm |
| Onuphis geophiliformis | Polychaete Worm |
| Onuphis iridescens | Polychaete Worm |
| Onuphis quadricuspis | Polychaete Worm |
| Onychodiaptomus hesperus | Copepod |
| Onychoprion aleuticus | Aleutian Tern |
| Opechona alaskensis | Parasite |
| Opechona bacillaris | Parasite |
| Opechona occidentalis | Parasite |
| Operophtera danbyi | Moth |
| Ophelia limacina | Polychaete Worm |
| Ophelina acuminata | Polychaete Worm |
| Ophelina breviata | Polychaete Worm |
| Ophiacantha abyssa | Granulated Brittle Star |
| Ophiacantha bathybia | Granulated Brittle Star |
| Ophiacantha cataleimmoida | Granulated Brittle Star |
| Ophiacantha diplasia | Granulated Brittle Star |
| Ophiacantha eurypoma | Granulated Brittle Star |
| Ophiacantha rhachophora | Granulated Brittle Star |
| Ophiacantha trachybactra | Granulated Brittle Star |
| Ophiacanthella acontophora | Granulated Brittle Star |
| Ophiocten hastatum | Scaly Brittle Star |
| Ophiocten pacificum | Scaly Brittle Star |
| Ophiodermella cancellata | Cancellate Snakeskin-Snail |
| Ophiodromus pugettensis | Bat Star Commensal Worm |
| Ophioleuce oxycraspedon | Brittle Star |
| Ophiomusium glabrum | Brittle Star |
| Ophiomusium lymani | Lyman's Deep Sea Brittle Star |
| Ophiomusium multispinum | Brittle Star |
| Ophioplocus esmarki | Esmark's Brittle Star |
| Ophiosemnotes paucispina | Granulated Brittle Star |
| Ophiosphalma jolliense | Tile Brittle Star |
| Ophiothrix spiculata | Glass-Spined Brittle Star |
| Ophioxenos lampetrae | Parasite |
| Ophiura bathybia | Scaly Brittle Star |
| Ophiura cryptolepis | Scaly Brittle Star |
| Ophiura flagellata | Scaly Brittle Star |
| Ophiura irrorata | Scaly Brittle Star |
| Ophiura leptoctenia | Scaly Brittle Star |
| Ophraella bilineata | Purple Loosestrife Beetle |
| Ophraella communa | Purple Loosestrife Beetle |
| Ophraella pilosa | Leaf Beetle |
| Ophryastes cinerascens | White-fringed Weevil |
| Ophyiulus pilosus | European Millipede |
| Opilio parietinus | Harvestman |
| Opisa eschrichti | Amphipod |
| Opisa odontochela | Amphipod |
| Opisa tridentata | Amphipod |
| Opisthoteuthis californiana | Dumbo Octopus |
| Opostegoides scioterma | Moth |
| Opostomias mitsuii | Pitgum Dragonfish |
| Opsius stactogalus | True Bug |
| Optioservus divergens | Riffle Beetle |
| Optioservus fastiditus | Riffle Beetle |
| Optioservus quadrimaculatus | Riffle Beetle |
| Optioservus seriatus | Riffle Beetle |
| Oradarea longimana | Amphipod |
| Orbinella nuda | Polychaete Worm |
| Orbinia felix | Polychaete Worm |
| Orchelimum gladiator | Gladiator Meadow Katydid |
| Orchesia castanea | False Darkling Beetle |
| Orchestes alni | European Elm FleWeevil |
| Orchestes griseus | Weevil |
| Orchestes mixtus | Nut and Acorn Weevil |
| Orchestes pallicornis | Apple FleWeevil |
| Orchestes testaceus | Alder Jumping Weevil |
| Orchomene nugax | Amphipod |
| Orchomene obtusa | Amphipod |
| Orchomene recondita | Amphipod |
| Orchomenella holmesi | Amphipod |
| Orchomenella minuta | Amphipod |
| Orchomenella pacifica | Amphipod |
| Orchopeas caedens durus | Parasite |
| Orcinocyamus orcinus | Amphipod |
| Ordobrevia nubifera | Riffle Beetle |
| Orectoderus arcuatus | True Bug |
| Orectoderus obliquus | True Bug |
| Orenaia pallidivittalis | Moth |
| Orenaia trivialis | Moth |
| Oreodytes alaskanus | Predaceous Diving Beetle |
| Oreodytes angustior | Predacious Diving Beetle |
| Oreodytes crassulus | Predacious Diving Beetle |
| Oreodytes laevis | Predaceous Diving Beetle |
| Oreodytes obesus | Predacious Diving Beetle |
| Oreodytes obesus cordillerensis | Beetle |
| Oreodytes productotruncatus | Beetle |
| Oreodytes scitulus scitulus | Beetle |
| Oreodytes snoqualmie | Predaceous Diving Beetle |
| Oreoneta banffkluane | Sheetweb Spider |
| Oreoneta leviceps | Spider |
| Oreonetides filicatus | Sheetweb Spider |
| Oreonetides flavus | Sheetweb Spider |
| Oreonetides rectangulatus | Sheetweb Spider |
| Oreonetides rotundus | Sheetweb Spider |
| Oreonetides sp. | Sheetweb Spider |
| Oreonetides vaginatus | Sheetweb Spider |
| Oreophantes recurvatus | Sheetweb Spider |
| Orestia robusta | Leaf Beetle |
| Oreta rosea | Rose Hooktip Moth |
| Orinisobates expressus | Millipede |
| Oriopsis gracilis | Polychaete Worm |
| Oriopsis minuta | Polychaete Worm |
| Orius diespeter | True Bug |
| Orius insidiosus | True Bug |
| Orius minutus | True Bug |
| Orius tristicolor | True Bug |
| Orobanus falli | Rove Beetle |
| Orobanus rufipes | Rove Beetle |
| Orobanus simulator | Rove Beetle |
| Orobanus tarsalis | Rove Beetle |
| Orocastus labeculus | True Bug |
| Orocastus perpusillus | True Bug |
| Orocastus pinnipenis | True Bug |
| Orochares tumidus | Ocellate Rove Beetle |
| Orodrassus canadensis | Ground Spider |
| Orphilus subnitidus | Tropical Powderpost Beetle |
| Orphulella pelidna | Spotted-winged Grasshopper |
| Orsodacne atra | Ravenous Leaf Beetle |
| Orthezia newcomeri | True Bug |
| Orthezia olivacea | True Bug |
| Orthocephalus coriaceus | True Bug |
| Orthocis punctatus | Minute Tree-fungus Beetle |
| Orthodes detracta | Moth |
| Orthodes goodelli | Cutworm Moth |
| Orthodes goodelli | Moth |
| Orthodes noverca | Moth |
| Orthodes obscura | Cutworm Moth |
| Orthodes obscura | Moth |
| Orthofidonia exornata | Moth |
| Orthofidonia tinctaria | Moth |
| Orthohalarachne diminuata | Parasite |
| Ortholasma pictipes | Harvestman |
| Ortholepis pasadamia | Striped Birch Pyralid Moth |
| Ortholinea orientalis | Parasite |
| Orthoperus atomus | Minute Fungus Beetle |
| Orthoperus scutellaris | Minute Hooded Beetle |
| Orthops scutellatus | True Bug |
| Orthoris crotchii | Snout Beetle |
| Orthosia ferrigera | Cutworm Moth |
| Orthotaenia undulana | Dusky Leafroller |
| Orthotomicus caelatus | Cedar Bark Beetle |
| Orthotomicus latidens | Cedar Bark Beetle |
| Orthotrichia cristata | Caddisfly |
| Orthotylus alni | True Bug |
| Orthotylus candidatus | True Bug |
| Orthotylus contrastus | True Bug |
| Orthotylus dorsalis | True Bug |
| Orthotylus katmai | True Bug |
| Orthotylus neglectus | True Bug |
| Orthotylus ochrotrichus | True Bug |
| Orthotylus pacificus | True Bug |
| Orthotylus ute | True Bug |
| Orus distinctus | Rove Beetle |
| Orus punctatus | Rove Beetle |
| Orus sinuatus | Rove Beetle |
| Oryzaephilus mercator | Merchant Grain Beetle |
| Oryzaephilus surinamensis | Sawtoothed Grain Beetle |
| Osbornellus borealis | True Bug |
| Osbornellus scalaris | True Bug |
| Oscarella carmela | Sponge |
| Osobenus yakimae | Stonefly |
| Ossiannilssonola volans | True Bug |
| Ostearius melanopygius | Sheetweb Spider |
| Osteodiscus cascadiae | Bigtailed Snailfish |
| Ostoma columbiana | Bark-Gnawing Beetle |
| Ostoma ferruginea | Bark-Gnawing Beetle |
| Ostoma pippingskoeldi | Bark-Gnawing Beetle |
| Ostrea lurida | Olympia Oyster |
| Ostrinia marginalis | Moth |
| Ostrinia penitalis | American Lotus Borer |
| Ostrocera dimicki | Stonefly |
| Ostrocera foersteri | Stonefly |
| Otiocerus degeerii | True Bug |
| Otiorhynchus ovatus | Strawberry Root Weevil |
| Otiorhynchus raucus | White-fringed Weevil |
| Otiorhynchus rugosostriatus | Snout Beetle |
| Otobius megnini | Spinose Ear Tick |
| Otodistomum veliporum | Parasite |
| Otophorus haemorrhoidalis | Hide Beetle |
| Oulema melanopus | Cereal Leaf Beetle |
| Ovatus crataegarius | True Bug |
| Owenia fusiformis | Polychaete Worm |
| Oxidus gracilis | Flat-backed Millipede |
| Oxyethira aeola | Caddisfly |
| Oxyethira michiganensis | Caddisfly |
| Oxyethira serrata | Caddisfly |
| Oxylaemus californicus | Dry Bark Beetle |
| Oxyloma groenlandicum | Ruddy Ambersnail |
| Oxyloma hawkinsii | Boundary Ambersnail |
| Oxyloma nuttallianum | Oblique Ambersnail |
| Oxyomus silvestris | Scarab Beetle |
| Oxyomus sylvestris | Hide Beetle |
| Oxypoda egestosa | Rove Beetle |
| Oxypoda famula | Rove Beetle |
| Oxypoda frigida | Rove Beetle |
| Oxypoda gatosensis | Rove Beetle |
| Oxypoda glenorae | Rove Beetle |
| Oxypoda grandipennis | Rove Beetle |
| Oxypoda impressa | Rove Beetle |
| Oxypoda lacustris | Rove Beetle |
| Oxypoda longicarinata | Rove Beetle |
| Oxypoda manitobae | Rove Beetle |
| Oxypoda nimbata | Rove Beetle |
| Oxypoda opaca | Rove Beetle |
| Oxypoda optiva | Rove Beetle |
| Oxypoda regressa | Rove Beetle |
| Oxypoda smithi | Rove Beetle |
| Oxypoda stanleyi | Rove Beetle |
| Oxypoda vancouveri | Rove Beetle |
| Oxyporus occipitalis | Cross-toothed Rove Beetle |
| Oxypselaphus puncticeps | Ground Beetle |
| Oxypselaphus pusillus | Long-necked Ground Beetle |
| Oxyptilus delawaricus | Hawkweed Plume Moth |
| Oxytelus fuscipennis | Rove Beetle |
| Oxytelus laqueatus | Spiny-legged Rove Beetle |
| Oxytelus montanus | Rove Beetle |
| Oxytelus sculptus | Spiny-legged Rove Beetle |
| Ozolaimus megatyphlon | Parasite |
| Ozophora occidentalis | True Bug |
| Ozyptila arctica | Leaflitter Crab Spider |
| Ozyptila conspurcata | Spider |
| Ozyptila pacifica | Leaflitter Crab Spider |
| Ozyptila praticola | Spider |
| Ozyptila sincera | Crab Spider |
| Pachybrachis autolycus | Leaf Beetle |
| Pachybrachis bivittatus | Scriptured Leaf Beetle |
| Pachybrachis donneri | Scriptured Leaf Beetle |
| Pachybrachis melanostictus | Scriptured Leaf Beetle |
| Pachybrachis minor | Scriptured Leaf Beetle |
| Pachybrachis nigricornis | Scriptured Leaf Beetle |
| Pachybrachis nigricornis difficilis | Scriptured Leaf Beetle |
| Pachybrachis obsoletus | Scriptured Leaf Beetle |
| Pachybrachis vacillatus | Leaf Beetle |
| Pachycara bulbiceps | Abyssal Eelpout |
| Pachycara gymninium | Nakedneck Eelpout |
| Pachycara lepinium | Scalyneck Eelpout |
| Pachycerianthus aestuarii | Tube Anemone |
| Pachycerianthus johnsoni | Tube Anemone |
| Pachyegis brunnea | Bryozoa |
| Pachygnatha clercki | Thickjawed Orbweaver |
| Pachygnatha dorothea | Thickjawed Orbweaver |
| Pachypappa sacculi | True Bug |
| Pachypappa tremulae | True Bug |
| Pachyrhinus californicus | Snout Beetle |
| Pachyrhinus elegans | Pine Needle Weevil |
| Pachyrhinus ferrugineus | Pine Needle Weevil |
| Pachystilicus hanhami | Spiny-legged Rove Beetle |
| Pachyta lamed liturata | Elderberry Longhorn Beetle |
| Pacificanthia consors | Soldier Beetle |
| Pacificanthia curtisi | Soldier Beetle |
| Pacificulodes levingsi | Amphipod |
| Pacificulodes spinipes | Amphipod |
| Pacificulodes zernovi | Amphipod |
| Pacifiphantes magnificus | Sheetweb Spider |
| Paciforchestia klawei | Amphipod |
| Pactopus hornii | False Metallic Wood-boring Beetle |
| Paederus littorarius | Spiny-legged Rove Beetle |
| Paelopatides confundens | Sea Cucumber |
| Pagaronia tredecimpunctata | True Bug |
| Pagasa fusca | True Bug |
| Palaeagapetus guppyi | Caddisfly |
| Palaeagapetus nearcticus | Caddisfly |
| Paleonotus chrysolepis | Polychaete Worm |
| Palio dubia | Dubious Dorid |
| Palorus ratzeburgii | Smalleyed Flour Beetle |
| Palpita magniferalis | Splendid Palpita |
| Paluda gladiola | True Bug |
| Pammene felicitana | Moth |
| Pammene perstructana | Moth |
| Panaphis juglandis | True Bug |
| Panchlora latipennis | Cockroach |
| Panchlora nivea | Green Banana Cockroach |
| Pandalopsis ampla | Shrimp |
| Pandalopsis lucidirimicola | Sparkling Shrimp |
| Pandea rubra | Jellyfish |
| Pandemis canadana | Green Aspen Leaftier |
| Pandemis coniferana | Moth |
| Pandemis heparana | Dark Fruit-tree Tortrix |
| Pandemis lamprosana | Woodgrain Leafroller |
| Pandemis limitata | Three-lined Leafroller |
| Pandemis pyrusana | Pandemis Leafroller |
| Pandora glacialis | Glacial Pandora |
| Pandora punctata | Punctate Pandora |
| Pandorella bilirata | Slender Clam |
| Pandorella filosa | Slender Clam |
| Pandorella glacialis | Slender Clam |
| Pandorella wardiana | Slender Clam |
| Pannychia moseleyi | Deep Sea Cucumber |
| Panomya ampla | Ample Roughmya |
| Panomya norvegica | Arctic Roughmya |
| Panopea generosa | Geoduck |
| Panscopus abruptus | Pine Needle Weevil |
| Panscopus aequalis | Snout Beetle |
| Panscopus bakeri | Broad-nosed Weevil |
| Panscopus costatus | Snout Beetle |
| Panscopus gemmatus | Pine Needle Weevil |
| Panscopus ovalis | Pine Needle Weevil |
| Panscopus pallidus | Snout Beetle |
| Panscopus rugicollis | Pine Needle Weevil |
| Panscopus spantoni | Broad-nosed Weevil |
| Panscopus squamosus | Broad-nosed Weevil |
| Panscopus torpidus | Snout Beetle |
| Panscopus tricarinatus | Broad-nosed Weevil |
| Pantachogon haeckeli | Jellyfish |
| Panthea acronyctoides | Cutworm Moth |
| Panthea furcilla | Eastern Panthea |
| Paobius columbiensis | Centipede |
| Paobius orophilus | Centipede |
| Papestra biren | Cutworm Moth |
| Papestra brenda | Cutworm Moth |
| Papestra invalida | Cutworm Moth |
| Papestra quadrata | Cutworm Moth |
| Papilio indra indra | Indra Swallowtail |
| Papilio machaon hudsonianus | Old World Swallowtail |
| Parabagrotis cupidissima | Cutworm Moth |
| Parabagrotis formalis | Cutworm Moth |
| Paracalliopiella pratti | Amphipod |
| Paracallisoma coecum | Amphipod |
| Paracerceis cordata | Isopod |
| Paraclemensia acerifoliella | Maple Leafcutter Moth |
| Paracuaria tridentata | Parasite |
| Paracyathus caltha | Stony Coral |
| Paracymus confusus | Water Scavenger Beetle |
| Paracymus subcupreus | Minute Mud-loving Beetle |
| Paracymus tarsalis | Water Scavenger Beetle |
| Paradacerla downesi | True Bug |
| Paradacerla formicina | True Bug |
| Paradexiospira vitrea | Polychaete Worm |
| Paradilacra densissima | Rove Beetle |
| Paradilacra glenorica | Rove Beetle |
| Paradonus pectoralis | ctenicera |
| Paragissa americana | Amphipod |
| Paragoniusa myrmicae | Rove Beetle |
| Paragorgia yutlinux | Coral |
| Parahemiurus merus | Parasite |
| Parajulus perditus | Millipede |
| Paralaeospira malardi | Polychaete Worm |
| Paralafystius mcallisteri | Amphipod |
| Paraleptonia pacei | Rove Beetle |
| Paraleptophlebia bicornuta | Mayfly |
| Paraleptophlebia brunneipennis | Mayfly |
| Paraleptophlebia gregalis | Mayfly |
| Paraleptophlebia heteronea | Mayfly |
| Paraleptophlebia memorialis | Mayfly |
| Paraleptophlebia rufivenosa | Mayfly |
| Paraleucoptera albella | Cottonwood Leafminer |
| Paraleuctra forcipata | Stonefly |
| Paraleuctra occidentalis | Stonefly |
| Paraleuctra purcellana | Stonefly |
| Paraleuctra vershina | Stonefly |
| Paraliparis cephalus | Swellhead Snailfish |
| Paraliparis deani | Prickly Snailfish |
| Paraliparis latifrons | Bigpored Snailfish |
| Paraliparis melanobranchus | Phantom Snailfish |
| Paraliparis paucidens | Toothless Snailfish |
| Paraliparis pectoralis | Pectoral Snailfish |
| Paraliparis ulochir | Broadfin Snailfish |
| Parallorchestes brevicornis | Amphipod |
| Parallorchestes minima | Amphipod |
| Parallorchestes minor | Amphipod |
| Parallorchestes nuda | Amphipod |
| Parallorchestes occidentalis | Amphipod |
| Parallorchestes ochotensis | Amphipod |
| Parallorchestes spinosa | Amphipod |
| Parallorchestes subcarinata | Amphipod |
| Parallorchestes trispinosa | Amphipod |
| Paralobesia piceana | Moth |
| Paramblopusa borealis | Rove Beetle |
| Parameletus columbiae | Mayfly |
| Paramesus major | True Bug |
| Parametaphoxus fultoni | Amphipod |
| Parametaphoxus quaylei | Amphipod |
| Paramoera (Humilomoera) leucopthalma | Amphipod |
| Paramoera bousfieldi | Amphipod |
| Paramoera bucki | Amphipod |
| Paramoera carlottensis | Amphipod |
| Paramoera columbiana | Amphipod |
| Paramoera serrata | Amphipod |
| Paramoera suchaneki | Amphipod |
| Parandania boecki | Amphipod |
| Parandaniexis mirabilis | Amphipod |
| Paranemertes carnea | Ribbon Worm |
| Paranemertes sanjuanensis | Ribbon Worm |
| Paranonychus brunneus | Harvestman |
| Paranthrene tabaniformis | European Poplar Clearwing Moth |
| Paraoligolophus agrestis | Harvestman |
| Paraonella platybranchia | Polychaete Worm |
| Paraonella spinifera | Polychaete Worm |
| Parapagurus benedicti | Deep Sea Hermit Crab |
| Parapasiphaea sulcatifrons | Grooveback Shrimp |
| Paraperla frontalis | Stonefly |
| Paraperla wilsoni | Stonefly |
| Paraphlepsius apertinus | True Bug |
| Paraphlepsius apertus | True Bug |
| Paraphlepsius bifidus | True Bug |
| Paraphlepsius excavatus | True Bug |
| Paraphlepsius fulvidorsum | True Bug |
| Paraphlepsius irroratus | True Bug |
| Paraphlepsius lascivius | True Bug |
| Paraphlepsius occidentalis | True Bug |
| Paraphoxus communis | Amphipod |
| Paraphoxus gracilis | Amphipod |
| Paraphoxus pacificus | Amphipod |
| Paraphoxus similis | Amphipod |
| Paraphronima crassipes | Amphipod |
| Paraphronima gracilis | Amphipod |
| Paraplatyptilia albiciliatus | White-fringed Plume Moth |
| Paraplatyptilia albidorsellus | White-suffused Plume Moth |
| Paraplatyptilia albidus | Paintbrush Plume Moth |
| Paraplatyptilia edwardsii | Lousewort Plume Moth |
| Paraplatyptilia fragilis | Beardtongue Plume Moth |
| Paraplatyptilia maea | Brown-dotted Plume Moth |
| Paraplatyptilia nana | Pixie Plume Moth |
| Paraplatyptilia shastae | Mount Shasta Plume Moth |
| Parapleustes americanus | Amphipod |
| Parapoynx allionealis | Watermilfoil Leafcutter Moth |
| Paraprionospio pinnata | Polychaete Worm |
| Paraproba cincta | True Bug |
| Paraproba hamata | True Bug |
| Parapsyche almota | Caddisfly |
| Paraptochus sellatus | Snout Beetle |
| Paraptochus variegatus | White-fringed Weevil |
| Parascaris equorum | Parasite |
| Parasmittina trispinosa | Bryozoa |
| Paraswammerdamia albicapitella | Moth |
| Paraswammerdamia nebulella | Moth |
| Parasyrisca orites | Ground Spider |
| Paratachys edax | Ground Beetle |
| Paratenetus fuscus | Long-jointed Beetle |
| Parauleutes nebulosus | Minute Seed Weevil |
| Parazoanthus lucificum | Luminescent Parazoanthid |
| Parazygiella dispar | Spider |
| Pardalophora apiculata | Coral-Winged Grasshopper |
| Pardalosus pardalis | Hide Beetle |
| Pardosa albomaculata | Thinlegged Wolf Spider |
| Pardosa altamontis | Thinlegged Wolf Spider |
| Pardosa anomala | Thinlegged Wolf Spider |
| Pardosa bucklei | Thinlegged Wolf Spider |
| Pardosa coloradensis | Thinlegged Wolf Spider |
| Pardosa concinna | Thinlegged Wolf Spider |
| Pardosa distincta | Thinlegged Wolf Spider |
| Pardosa diuturna | Thinlegged Wolf Spider |
| Pardosa dorsalis | Thinlegged Wolf Spider |
| Pardosa dorsuncata | Thinlegged Wolf Spider |
| Pardosa furcifera | Thinlegged Wolf Spider |
| Pardosa fuscula | Thinlegged Wolf Spider |
| Pardosa groenlandica | Thinlegged Wolf Spider |
| Pardosa hyperborea | Thinlegged Wolf Spider |
| Pardosa lapponica | Thinlegged Wolf Spider |
| Pardosa lowriei | Thinlegged Wolf Spider |
| Pardosa mackenziana | Thinlegged Wolf Spider |
| Pardosa metlakatla | Thinlegged Wolf Spider |
| Pardosa moesta | Thinlegged Wolf Spider |
| Pardosa palustris | Thinlegged Wolf Spider |
| Pardosa podhorskii | Thinlegged Wolf Spider |
| Pardosa rainieriana | Thinlegged Wolf Spider |
| Pardosa sinistra | Thinlegged Wolf Spider |
| Pardosa tesquorum | Thinlegged Wolf Spider |
| Pardosa uintana | Thinlegged Wolf Spider |
| Pardosa vancouveri | Thinlegged Wolf Spider |
| Pardosa wyuta | Thinlegged Wolf Spider |
| Pardosa xerampelina | Thinlegged Wolf Spider |
| Parelaphostrongylus andersoni | Parasite |
| Parelaphostrongylus odocoilei | Parasite |
| Paresperella psila | Sponge |
| Pareurystheus dentatus | Amphipod |
| Paricelinus hopliticus | Thornback Sculpin |
| Pariphinotus escabrosus | Amphipod |
| Parkana alata | True Bug |
| Parnassius clodius altaurus | Clodius Appolo |
| Parnassius eversmanni thor | Eversmann's Apollo |
| Parnassius phoebus | Phoebus Appolo |
| Parnassius smintheus olympiannus | Rocky Mountain Apollo |
| Parornix alta | Moth |
| Parornix arbutifoliella | Moth |
| Parornix betulae | Moth |
| Parornix conspicuella | Moth |
| Parornix spiraeifoliella | Moth |
| Parothius californicus | Crab-like Rove Beetle |
| Parothius punctatus | Rove Beetle |
| Parthenicus brindleyi | True Bug |
| Parthenicus brooksi | True Bug |
| Parthenicus giffardi | True Bug |
| Parthenicus grex | True Bug |
| Parthenicus pallidicollis | True Bug |
| Parthenicus sabulosus | True Bug |
| Parthenolecanium corni | True Bug |
| Parthenolecanium pruinosum | True Bug |
| Parthenolecanium quercifex | True Bug |
| Parvatrema obscurum | Parasite |
| Parvicapsula minibicornis | Parasite |
| Pasaremus concentricus | True Bug |
| Pasiphaea tarda | Crimson Pasiphaeid |
| Patinopecten caurinus | Weathervane Scallop |
| Patrobus fossifrons | Round Sand Beetle |
| Patrobus foveocollis | Round Sand Beetle |
| Patrobus septentrionis | Round Sand Beetle |
| Patrobus septentrionis septentrionis | Beetle |
| Pauropus mixtus | Pauropod |
| Pecten groenlandicus | Bivalve |
| Pectinaria californiensis | Polychaete Worm |
| Pectinaster agassizi evoplus | Sea Star |
| Pectotoma hoppingi | False Flower Beetle |
| Pediacus andrewsi | Flat Bark Beetle |
| Pediacus depressus | Flat Bark Beetle |
| Pediacus fuscus | Flat Bark Beetle |
| Pediacus hesperoglaber | Flat Bark Beetle |
| Pediacus ommatodon | Flat Bark Beetle |
| Pediacus stephani | Flat Bark Beetle |
| Pediasia aridella | Moth |
| Pediasia browerellus | Moth |
| Pediasia dorsipunctellus | Moth |
| Pediasia truncatellus | Moth |
| Pedicellina cernua | Entoproct |
| Pedilus flabellatus | Fire-Colored Beetle |
| Pedilus inconspicuus | Fire-Colored Beetle |
| Pedilus oregonus | Fire-Colored Beetle |
| Pedilus punctulatus | Fire-Colored Beetle |
| Pedinosoma curtum | Polychaete Worm |
| Pedostrangalia obliterata | Long-horned Beetle |
| Pedostrangalia plagifera | Long-horned Beetle |
| Pedostrangalia propinqua | Long-horned Beetle |
| Pedostrangalia vitiosa | Long-horned Beetle |
| Pelagobia longicirrata | Polychaete Worm |
| Pelagonemertes brinckmanni | Ribbon Worm |
| Pelagonemertes joubini | Ribbon Worm |
| Pelecomalium puberulum | Rove Beetle |
| Pelecomalium testaceum | Rove Beetle |
| Pelecopsis mengei | Sheetweb Spider |
| Pelecopsis sculpta | Sheetweb Spider |
| Pelecyphorus densicollis | Darkling Beetle |
| Pelegrina aeneola | Jumping Spider |
| Pelegrina clemata | Jumping Spider |
| Pelegrina flavipes | Jumping Spider |
| Pelegrina helenae | Jumping Spider |
| Pelegrina montana | Jumping Spider |
| Pelegrina proterva | Jumping Spider |
| Pelenomus fuliginosus | Minute Seed Weevil |
| Pelenomus squamipennis | Snout Beetle |
| Pelenomus squamosus | Minute Seed Weevil |
| Pelenomus ventralis | Snout Beetle |
| Pelioptera robustum | Rove Beetle |
| Pellenes ignifrons | Jumping Spider |
| Pellenes lapponicus | Jumping Spider |
| Pellenes shoshonensis | Jumping Spider |
| Pellucidhaptor pellucidhaptor | Parasite |
| Pelochrista agricolana | Moth |
| Pelochrista argenteana | Moth |
| Pelochrista argentialbana | Moth |
| Pelochrista biplagata | Moth |
| Pelochrista biquadrana | Moth |
| Pelochrista canana | Moth |
| Pelochrista canariana | Moth |
| Pelochrista caniceps | Moth |
| Pelochrista cataclystiana | Solidaga Pelochrista |
| Pelochrista comatulana | Moth |
| Pelochrista conspiciendana | Moth |
| Pelochrista crambitana | Moth |
| Pelochrista derelicta | Derelict Eucosma Moth |
| Pelochrista dodana | Moth |
| Pelochrista dorsisignatana | Triangle-backed Eucosma Moth |
| Pelochrista excusabilis | Moth |
| Pelochrista hohana | Moth |
| Pelochrista juncticiliana | Moth |
| Pelochrista kingi | Moth |
| Pelochrista lolana | Moth |
| Pelochrista louisana | Moth |
| Pelochrista mediostriata | Moth |
| Pelochrista medullana | Moth |
| Pelochrista morrisoni | Moth |
| Pelochrista nandana | Moth |
| Pelochrista optimana | Moth |
| Pelochrista ragonoti | Moth |
| Pelochrista rorana | Moth |
| Pelochrista scintillana | Moth |
| Pelochrista serpentana | Moth |
| Pelochrista subflavana | Moth |
| Pelochrista watertonana | Moth |
| Peltis fraterna | Soft-winged Flower Beetle |
| Peltis pippingskoeldi | Soft-winged Flower Beetle |
| Peltis septentrionalis | Soft-winged Flower Beetle |
| Peltodoris lentiginosa | Giant Freckled Dorid |
| Peltodytes callosus | Crawling Water Beetle |
| Peltodytes edentulus | Crawling Water Beetle |
| Peltodytes simplex | Crawling Water Beetle |
| Peltogaster boschmae | Tubeworm Hermit Parasitic Barnacle |
| Peltogasterella gracilis | Hermit Crab Parasitic Barnacle |
| Peltonotellus histrionicus | True Bug |
| Pemphigus betae | True Bug |
| Pemphigus bursarius | True Bug |
| Pemphigus monophagus | True Bug |
| Pemphigus nortonii | True Bug |
| Pemphigus populicaulis | True Bug |
| Pemphigus populiramulorum | True Bug |
| Pemphigus populivenae | True Bug |
| Pemphigus spyrothecae | True Bug |
| Penitella conradi | Abalone Piddock |
| Penitella penita | Flat-Tip Piddock |
| Penitella richardsoni | Monterey Piddock |
| Pennatula phosphorea | Pennatulacean |
| Penstemonia clarkei | Moth |
| Pentagramma variegata | True Bug |
| Pentamera lissoplaca | Sea Cucumber |
| Pentamera pediparva | Fine-Footed Pentamera |
| Pentamera populifera | Common Pentamera |
| Pentamera trachyplaca | Rough Plated Pentamera Sea Cucumber |
| Pentametrocrinus cf. varians | Feather Star |
| Pentaria fuscula | False Flower Beetle |
| Pentaria trifasciata | False Flower Beetle |
| Peprilus simillimus | Pacific Pompano |
| Perampithoe humeralis | Amphipod |
| Perampithoe lindbergi | Amphipod |
| Perampithoe plea | Amphipod |
| Perampithoe stypotrupetes | Amphipod |
| Perampithoe tea | Amphipod |
| Peranabrus scabricollis | Coulee Cricket |
| Perapion punctinasum | Pear-shaped Weevil |
| Percopsis omiscomaycus | Trout-Perch |
| Percymoorensis marmorata | Freshwater Leech |
| Peribolaster biserialis | Sea Star |
| Perillus exaptus | True Bug |
| Periphyllus aceris | True Bug |
| Periphyllus brevispinosus | True Bug |
| Periphyllus californiensis | True Bug |
| Periphyllus lyropictus | True Bug |
| Periphyllus negundinis | True Bug |
| Periplaneta fuliginosa | Smokybrown Cockroach |
| Peritelinus oregonus | White-fringed Weevil |
| Peritelinus variegatus | Snout Beetle |
| Peritrechus convivus | True Bug |
| Peritrechus fraternus | True Bug |
| Peritrechus pilosus | True Bug |
| Peritrechus tristis | True Bug |
| Perittia cygnodiella | Moth |
| Perizoma basaliata | Moth |
| Perizoma custodiata | Moth |
| Perkinsus qugwadi | Parasite |
| Perlomyia collaris | Stonefly |
| Perlomyia utahensis | Stonefly |
| Pero honestaria | Honest Pero |
| Pero occidentalis | Moth |
| Perognathus parvus | Great Basin Pocket Mouse |
| Perotripus brevis | Amphipod |
| Petaloproctus tenuis borealis | Polychaete Worm |
| Petaloproctus tenuis tenuis | Polychaete Worm |
| Petricola carditoides | Hearty Petricola |
| Petrochelidon fulva | Cave Swallow |
| Petrolisthes cinctipes | Porcelain Crab |
| Pettiboneia brevipalpa | Polychaete Worm |
| Phaedon armoraciae armoraciae | Leaf Beetle |
| Phaedon armoraciae niger | Leaf Beetle |
| Phaedon laevigatus | Scriptured Leaf Beetle |
| Phaedon oviformis | Scriptured Leaf Beetle |
| Phaedon prasinellus | Scriptured Leaf Beetle |
| Phaedon viridis | Scriptured Leaf Beetle |
| Phaenocerus americanus | False Click Beetle |
| Phaenops californica | Metallic Wood-boring Beetle |
| Phaenops drummondi | Drummond's Flathead Fir Borer |
| Phaenops fulvoguttata | Hemlock Borer |
| Phaenops gentilis | Metallic Wood-boring Beetle |
| Phaenops intrusa | Metallic Wood-boring Beetle |
| Phaenops lecontei | Metallic Wood-boring Beetle |
| Phaeoura mexicanaria | Moth |
| Phaethon rubricauda | Red-Tailed Tropicbird |
| Phalacrophorus pictus | Polychaete Worm |
| Phalacrus penicillatus | Shining Flower Beetle |
| Phalaenostola hanhami | Hanham's Owlet |
| Phaleromela globosa | Darkling Beetle |
| Phanerodon furcatus | White Seaperch |
| Phaneroptera gracilis | Slender Bush Katydid |
| Phaneroptera gracilis gracilis | Slender Bush Katydid |
| Phanias albeolus | Jumping Spider |
| Phanias concoloratus | Jumping Spider |
| Phantyna terranea | Meshweaver |
| Pheidole californica | Ant |
| Phellopsis porcata | Ironclad Beetle |
| Phenacoccus aceris | True Bug |
| Phenacoccus capensis | True Bug |
| Phenacoccus colemani | True Bug |
| Phenacoccus solani | True Bug |
| Phenacomys intermedius | Heather Vole |
| Pherusa inflata | Polychaete Worm |
| Pherusa negligans | Polychaete Worm |
| Pherusa papillata | Polychaete Worm |
| Pherusa plumosa | Polychaete Worm |
| Phiaris siderana | Moth |
| Phidippus purpuratus | Jumping Spider |
| Phidippus tyrrelli | Jumping Spider |
| Philaenarcys bilineata | True Bug |
| Philhygra angusticauda | Rove Beetle |
| Philhygra botanicarum | Rove Beetle |
| Philhygra clemens | Rove Beetle |
| Philhygra laevicollis | rove beetle |
| Philhygra prognata | Rove Beetle |
| Philine polaris | Axial Paperbubble |
| Philobrya setosa | Hairy Philobyra |
| Philodromus californicus | Running Crab Spider |
| Philodromus cespitum | Running Crab Spider |
| Philodromus histrio | Running Crab Spider |
| Philodromus insperatus | Running Crab Spider |
| Philodromus josemitensis | Running Crab Spider |
| Philodromus mysticus | Running Crab Spider |
| Philodromus oneida | Running Crab Spider |
| Philodromus pernix | Running Crab Spider |
| Philodromus placidus | Running Crab Spider |
| Philodromus praelustris | Running Crab Spider |
| Philodromus rodecki | Running Crab Spider |
| Philodromus speciosus | Running Crab Spider |
| Philolithus densicollis | Long-jointed Beetle |
| Philometroides huronensis | Parasite |
| Philonema agubernaculum | Parasite |
| Philonema onchorhynchi | Parasite |
| Philonema oncorhynchi | Parasite |
| Philonthus agilis | Rove Beetle |
| Philonthus albionicus | Rove Beetle |
| Philonthus aurulentus | Large Rove Beetle |
| Philonthus boreas | Large Rove Beetle |
| Philonthus bucephalus | Rove Beetle |
| Philonthus busiris | Rove Beetle |
| Philonthus caeruleipennis caeruleipennis | Beetle |
| Philonthus carbonarius | Large Rove Beetle |
| Philonthus caucasicus | Large Rove Beetle |
| Philonthus caurinus | Rove Beetle |
| Philonthus cephalotes | Rove Beetle |
| Philonthus chlorinus | Rove Beetle |
| Philonthus cognatus | Large Rove Beetle |
| Philonthus concinnus | Rove Beetle |
| Philonthus confertoides | Rove Beetle |
| Philonthus couleensis | Large Rove Beetle |
| Philonthus crestonensis | Rove Beetle |
| Philonthus crotchi | Rove Beetle |
| Philonthus cruentatus | Large Rove Beetle |
| Philonthus cyanipennis | Rove Beetle |
| Philonthus davus | Rove Beetle |
| Philonthus debilis | Large Rove Beetle |
| Philonthus distans | Rove Beetle |
| Philonthus duplicatus | Rove Beetle |
| Philonthus ferreipennis | Rove Beetle |
| Philonthus flavibasis | Rove Beetle |
| Philonthus forcipatus | Rove Beetle |
| Philonthus fulcinius | Rove Beetle |
| Philonthus furvus | Rove Beetle |
| Philonthus gaudens | Rove Beetle |
| Philonthus gracilior | Large Rove Beetle |
| Philonthus grandicollis | Rove Beetle |
| Philonthus hepaticus | Large Rove Beetle |
| Philonthus instabilis | Rove Beetle |
| Philonthus jurgans | Rove Beetle |
| Philonthus kaszabi | Rove Beetle |
| Philonthus lecontei | Rove Beetle |
| Philonthus leechensis | Rove Beetle |
| Philonthus lindrothi | Rove Beetle |
| Philonthus lomatus | Large Rove Beetle |
| Philonthus morosus | Rove Beetle |
| Philonthus nudus | Large Rove Beetle |
| Philonthus occidentalis | Rove Beetle |
| Philonthus opacipennis | Rove Beetle |
| Philonthus perversus | Rove Beetle |
| Philonthus pettiti | Rove Beetle |
| Philonthus picicornis | Rove Beetle |
| Philonthus politus | Large Rove Beetle |
| Philonthus pseudolodes | Rove Beetle |
| Philonthus puberulus | Rove Beetle |
| Philonthus pubes | Rove Beetle |
| Philonthus quadricollis | Large Rove Beetle |
| Philonthus quadrulus | Rove Beetle |
| Philonthus rainieri | Rove Beetle |
| Philonthus rectangulus | Large Rove Beetle |
| Philonthus rufulus | Large Rove Beetle |
| Philonthus sanguinolentus | Large Rove Beetle |
| Philonthus siegwaldii | Rove Beetle |
| Philonthus sordidus | Rove Beetle |
| Philonthus spiniformis | Rove Beetle |
| Philonthus stacesmithi | Rove Beetle |
| Philonthus stictus | Rove Beetle |
| Philonthus subvirescens | Rove Beetle |
| Philonthus tenuicornis | Rove Beetle |
| Philonthus theveneti | Rove Beetle |
| Philonthus triangulum | Large Rove Beetle |
| Philonthus umbratilis | Rove Beetle |
| Philonthus validus | Rove Beetle |
| Philonthus varians | Large Rove Beetle |
| Philonthus varius | Rove Beetle |
| Philonthus vulgatus | Large Rove Beetle |
| Philophuga viridis amoena | Colorful Foliage Ground Beetle |
| Philorhizus melanocephalus | Flat-horned Ground Beetle |
| Phimodera binotata | True Bug |
| Phlaeopterus castaneus | Rove Beetle |
| Phlaeopterus cavicollis | Ocellate Rove Beetle |
| Phlaeopterus frosti | Rove Beetle |
| Phlaeopterus fusconiger | Rove Beetle |
| Phlaeopterus houkae | Rove Beetle |
| Phlaeopterus lagrandeuri | Ocellate Rove Beetle |
| Phlaeopterus loganensis | Rove Beetle |
| Phlaeopterus rufitarsis | Rove Beetle |
| Phlaeopterus stacesmithi | Rove Beetle |
| Phlattothrata flagellata | Sheetweb Spider |
| Phlattothrata parva | Spider |
| Phlegyas annulicrus | True Bug |
| Phloeonomus laesicollis | Ocellate Rove Beetle |
| Phloeonomus lapponicus | Rove Beetle |
| Phloeonomus pusillus | Rove Beetle |
| Phloeonomus suffusus | Ocellate Rove Beetle |
| Phloeophagus canadensis | Minute Seed Weevil |
| Phloeosinus cupressi | Cedar Bark Beetle |
| Phloeosinus hoferi | Bark And Ambrosia Beetle |
| Phloeosinus hoppingi | Bark And Ambrosia Beetle |
| Phloeosinus keeni | Bark And Ambrosia Beetle |
| Phloeosinus pini | Cedar Bark Beetle |
| Phloeosinus punctatus | Western Cedar Bark Beetle |
| Phloeosinus scopulorum scopulorum | Bark And Ambrosia Beetle |
| Phloeostiba lapponica | Rove Beetle |
| Phloeotribus lecontei | Bark and Ambrosia Beetle |
| Phloeotribus piceae | Bark and Ambrosia Beetle |
| Phlyctainophora squali | Parasite |
| Phobetus comatus | Rose Chafer |
| Phobus brucei | Moth |
| Phobus funerellus | Moth |
| Phobus incertus | Moth |
| Phoenicocoris longirostris | True Bug |
| Phoenicocoris rostratus | True Bug |
| Phoetaliotes nebrascensis | Grassland Grasshopper |
| Pholadidea ovoidea | Oval Piddock |
| Pholis schultzi | Red Gunnel |
| Pholoe glabra | Polychaete Worm |
| Pholoides asperus | Polychaete Worm |
| Phorodon humuli | True Bug |
| Phoronis ovalis | Phoronid |
| Phoronis pallida | Phoronid |
| Photedes defecta | Moth |
| Photedes inops | Moth |
| Photis brevipes | Amphipod |
| Photis fischmanni | Amphipod |
| Photis kurilica | Amphipod |
| Photis macinerneyi | Amphipod |
| Photis oligochaeta | Amphipod |
| Photis pachydactyla | Amphipod |
| Photis parvidons | Amphipod |
| Photis spasskii | Amphipod |
| Photuris pensylvanica | Beetle |
| Phragmatobia assimilans | Tiger Moth |
| Phratora frosti remissa | Leaf Beetle |
| Phratora hudsonia | Leaf Beetle |
| Phratora interstitialis | Scriptured Leaf Beetle |
| Phratora purpurea purpurea | Leaf Beetle |
| Phronima atlantica | Amphipod |
| Phronima sedentaria | Amphipod |
| Phrurotimpus borealis | Liocranid Sac Spider |
| Phrurotimpus certus | Liocranid Sac Spider |
| Phryganea cinerea | Caddisfly |
| Phryganeopsis brunnea | Moth |
| Phryganophilus collaris | False Darkling Beetle |
| Phtheochroa aegrana | Moth |
| Phtheochroa aureoalbida | Moth |
| Phtheochroa baracana | Moth |
| Phtheochroa canariana | Moth |
| Phtheochroa cartwrightana | Moth |
| Phtheochroa fulviplicana | Moth |
| Phtheochroa riscana | Moth |
| Phtheochroa villana | Moth |
| Phtheochroa vitellinana | Moth |
| Phtheochroa vulneratana | Moth |
| Phtheochroa waracana | Moth |
| Phthorimaea operculella | Potato Tuberworm |
| Phyciodes batesii lakota | Lakota Crescent |
| Phyciodes pallida barnesi | Barnes' Pale Crescent |
| Phycitodes mucidella | Moth |
| Phycitodes reliquella | Moth |
| Phyllaphis fagi | True Bug |
| Phyllobaenus humeralis | Checkered Beetle |
| Phyllobaenus lecontei | Checkeredbeetle |
| Phyllobaenus scaber | Checkered Beetle |
| Phyllobaenus subfasciatus | Checkered Beetle |
| Phyllobius intrusus | Arborvitae Weevil |
| Phyllobrotica decorata | Cucumber Beetle |
| Phyllochaetopterus claparedii | Tangled-Straw Three-Section Tubeworm |
| Phyllochaetopterus prolifica | Prolific Three-Section Tubeworm |
| Phyllodinus nervatus | True Bug |
| Phyllodistomum conostomum | Parasite |
| Phyllodistomum umblae | Parasite |
| Phyllodrepa caseyi | Rove Beetle |
| Phyllodrepa floralis | Rove Beetle |
| Phyllodrepa humilis | Rove Beetle |
| Phylloneta impressa | Cobweb Weaver |
| Phyllonorycter alnicolella | Moth |
| Phyllonorycter apicinigrella | Moth |
| Phyllonorycter apparella | Aspen Leaf Blotch Miner |
| Phyllonorycter arbutusella | Moth |
| Phyllonorycter basistrigella | Moth |
| Phyllonorycter blancardella | Spotted Tentiform Leafminer |
| Phyllonorycter elmaella | Western Tentiform Leafminer |
| Phyllonorycter erugatus | Moth |
| Phyllonorycter fitchella | Moth |
| Phyllonorycter fragilella | Moth |
| Phyllonorycter incanella | Moth |
| Phyllonorycter ledella | Moth |
| Phyllonorycter maestingella | Moth |
| Phyllonorycter martiella | Moth |
| Phyllonorycter mespilella | Moth |
| Phyllonorycter nipigon | Balsam Poplar Leaf Blotch Miner |
| Phyllonorycter populiella | Poplar Leafminer |
| Phyllonorycter salicifoliella | Willow Leaf Blotch Miner |
| Phyllonorycter scudderella | Moth |
| Phyllophaga anxia | Scarab Beetle |
| Phyllophaga fusca | Scarab Beetle |
| Phyllophaga tristis tristis | Beetle |
| Phyllopidea montana | True Bug |
| Phylloplana viridis | Green Flatworm |
| Phylloporia bistrigella | Moth |
| Phylloscopus inornatus | Yellow-browed Warbler |
| Phyllotreta albionica | Leaf Beetle |
| Phyllotreta armoraciae | Horseradish FleBeetle |
| Phyllotreta constricta | Leaf Beetle |
| Phyllotreta cruciferae | Leaf Beetle |
| Phyllotreta decipiens | Leaf Beetle |
| Phyllotreta denticornis | Skeletonizing Leaf Beetles and Flea Beetle |
| Phyllotreta inconspicua | Leaf Beetle |
| Phyllotreta lewisii | Skeletonizing Leaf Beetles and Flea Beetle |
| Phyllotreta ramosoides | Leaf Beetle |
| Phyllotreta robusta | Garden FleBeetle |
| Phyllotreta striolata | Striped FleBeetle |
| Phyllotreta utana | Leaf Beetle |
| Phyllotreta utanula | Leaf Beetle |
| Phyllotreta zimmermanni | Leaf Beetle |
| Phyllotrox nubifer | Nut and Acorn Weevil |
| Phyllotrox rutilus | Nut and Acorn Weevil |
| Phylloxera corticalis | True Bug |
| Phylloxera glabra | True Bug |
| Phylloxerina popularia | True Bug |
| Phylus coryli | True Bug |
| Phymaphora californica | Handsome Fungus Beetle |
| Phymata pennsylvanica | True Bug |
| Phymata vicina vicina | True Bug |
| Phymatodes aeneus | Elderberry Longhorn Beetle |
| Phymatodes concolor | Long-horned Beetle |
| Phymatodes decussatus decussatus | Longhorned Beetle |
| Phymatodes fulgidus | Longhorned Beetle |
| Phymatodes grandis | Elderberry Longhorn Beetle |
| Phymatodes hardyi | Long-horned Beetle |
| Phymatodes hirtellus | Elderberry Longhorn Beetle |
| Phymatodes hirtellus densipennis | Longhorned Beetle |
| Phymatodes lecontei | Longhorned Beetle |
| Phymatodes maculicollis | Elderberry Longhorn Beetle |
| Phymatodes nigrescens | Long-horned Beetle |
| Phymatodes nitidus | Elderberry Longhorn Beetle |
| Phymatodes obliquus | Elderberry Longhorn Beetle |
| Phymatodes testaceus | Longhorned Beetle |
| Phymatodes vulneratus | Elderberry Longhorn Beetle |
| Phymatopus behrensii | Moth |
| Phymatopus californicus | Lupine Ghost Moth |
| Physa jennessi | Obtuse Physa |
| Physatocheila plexa | True Bug |
| Physatocheila variegata | True Bug |
| Physella acuta | Pewter Physa |
| Physella columbiana | Rotund Physa |
| Physella mexicana | Polished Physa |
| Physella propinqua | Rocky Mountain Physa |
| Physella virginea | Sunset Physa |
| Physella wrighti | Hotwater Physa |
| Physocypria pustulosa | Seed Shrimp |
| Physokermes concolor | True Bug |
| Physokermes hemicryphus | True Bug |
| Physokermes taxifoliae | True Bug |
| Phytobius leucogaster | Snout Beetle |
| Phytocoris californicus | True Bug |
| Phytocoris conspurcatus | True Bug |
| Phytocoris dentatus | True Bug |
| Phytocoris dimidiatus | True Bug |
| Phytocoris driesbachi | True Bug |
| Phytocoris dumicola | True Bug |
| Phytocoris fraterculus | True Bug |
| Phytocoris inops | True Bug |
| Phytocoris jucundus | True Bug |
| Phytocoris juliae | True Bug |
| Phytocoris keltoni | True Bug |
| Phytocoris knowltoni | True Bug |
| Phytocoris lasiomerus | True Bug |
| Phytocoris neglectus | True Bug |
| Phytocoris occidentalis | True Bug |
| Phytocoris pallidicornis | True Bug |
| Phytocoris plenus | True Bug |
| Phytocoris politus | True Bug |
| Phytocoris populi | True Bug |
| Phytocoris purshiae | True Bug |
| Phytocoris rostratus | True Bug |
| Phytocoris stellatus | True Bug |
| Phytocoris strigosus | True Bug |
| Phytocoris tenuis | True Bug |
| Pidonia gnathoides | Longhorned Beetle |
| Pieris marginalis guppyi | Margined White |
| Pieris oleracea oleracea | Mustard White |
| Piesma cinereum | True Bug |
| Piesma explanatum | True Bug |
| Pigritia murtfeldtella | Moth |
| Pilophorus americanus | True Bug |
| Pilophorus clavatus | True Bug |
| Pilophorus diffusus | True Bug |
| Pilophorus perplexus | True Bug |
| Pilophorus stonedahli | True Bug |
| Pilophorus tibialis | True Bug |
| Pilophorus uhleri | True Bug |
| Pilophorus vicarius | True Bug |
| Pima albocostalialis | Moth |
| Pima boisduvaliella | Moth |
| Pima fosterella | Moth |
| Pima fulvirugella | Moth |
| Pima occidentalis | Moth |
| Pimoa curvata | Spider |
| Pimoa haden | Pimoid Spider |
| Pinalitus approximatus | True Bug |
| Pinalitus rostratus | True Bug |
| Pinalitus solivagus | True Bug |
| Pineus abietinus | True Bug |
| Pineus cembrae | True Bug |
| Pineus coloradensis | True Bug |
| Pineus engelmanni | True Bug |
| Pineus pinifoliae | True Bug |
| Pineus similis | True Bug |
| Pineus sylvestris | True Bug |
| Pinnixa eburna | Lugworm Dwelling Pea Crab |
| Pinnixa faba | Mantle Pea Crab |
| Pinnixa occidentalis | Western Pea Crab |
| Pinnotheres pugettensis | Smooth Tunicate Crab |
| Pinnotheres taylori | Tuberculate Tunicate Crab |
| Pinodytes cryptophagoides | Round Fungus Beetle |
| Pinodytes haidagwaii | Round Fungus Beetle |
| Pinophylus rolfsi | True Bug |
| Pinumius sexmaculatus | True Bug |
| Piodes coriacea | Elderberry Longhorn Beetle |
| Pione vastifera | Sponge |
| Pionosyllis gigantea | Red Giant Necklace-Worm |
| Pionosyllis magnifica | Polychaete Worm |
| Pirata bryantae | Wolf Spider |
| Pirata piraticus | Wolf Spider |
| Piratula canadensis | Thinlegged Wolf Spider |
| Piratula insularis | Thinlegged Wolf Spider |
| Piromis eruca | Polychaete Worm |
| Pisciocola milneri | Freshwater Leech |
| Pisciocola punctata | Freshwater Leech |
| Pisciocola salmositica | Freshwater Leech |
| Pisidium conventus | Alpine Peaclam |
| Pisidium fallax | River Peaclam |
| Pisidium ferrugineum | Rusty Peaclam |
| Pisidium insigne | Tiny Peaclam |
| Pisidium milium | Quadrangular Peaclam |
| Pisidium simplex | Perforated Peaclam |
| Pissodes affinis | Conifer Weevil |
| Pissodes costatus | Snout Beetle |
| Pissodes fasciatus | Snout Beetle |
| Pissodes fiskei | Snout Beetle |
| Pissodes radiatae | Conifer Weevil |
| Pissodes rotundatus | Snout Beetle |
| Pissodes schwarzi | Conifer Weevil |
| Pissodes similis | Conifer Weevil |
| Pissodes striatulus | Snout Beetle |
| Pissodes strobi | Engelmann Spruce Weevil |
| Pissodes terminalis | Lodgepole Terminal Weevil |
| Pissonotus delicatus | True Bug |
| Pissonotus rubrilatus | True Bug |
| Pista brevibranchiata | Polychaete Worm |
| Pista elongata | Basket-Top Spaghetti-Worm |
| Pista estavanica | Polychaete Worm |
| Pista moorei | Polychaete Worm |
| Pista pacifica | Fringed-Hood Spaghetti-Worm |
| Pista wui | Polychaete Worm |
| Pithanus maerkelii | True Bug |
| Pityogenes carinulatus | Cedar Bark Beetle |
| Pityogenes fossifrons | Cedar Bark Beetle |
| Pityogenes plagiatus knechteli | Bark And Ambrosia Beetle |
| Pityohyphantes alticeps | Spider |
| Pityohyphantes brachygynus | Spider |
| Pityohyphantes costatus | Sheetweb Spider |
| Pityohyphantes cristatus | Sheetweb Spider |
| Pityohyphantes kamela | Spider |
| Pityohyphantes limitaneus | Sheetweb Spider |
| Pityohyphantes minidoka | Spider |
| Pityohyphantes rubrofasciatus | Sheetweb Spider |
| Pityohyphantes subarcticus | Sheetweb Spider |
| Pityokteines elegans | Bark And Ambrosia Beetle |
| Pityokteines lasiocarpi | Bark And Ambrosia Beetle |
| Pityokteines minutus | Bark And Ambrosia Beetle |
| Pityokteines ornatus | Cedar Bark Beetle |
| Pityomacer pix | Pine Flower Weevil |
| Pityophthorus absonus | Bark And Ambrosia Beetle |
| Pityophthorus aquilus | Bark And Ambrosia Beetle |
| Pityophthorus boycei | Bark And Ambrosia Beetle |
| Pityophthorus carinatus monticolae | Bark And Ambrosia Beetle |
| Pityophthorus cariniceps | Palm Seed Borer |
| Pityophthorus confertus | Bark And Ambrosia Beetle |
| Pityophthorus confinis | Bark And Ambrosia Beetle |
| Pityophthorus consimilis | Palm Seed Borer |
| Pityophthorus digestus | Bark And Ambrosia Beetle |
| Pityophthorus fuscus | Bark And Ambrosia Beetle |
| Pityophthorus grandis | Bark And Ambrosia Beetle |
| Pityophthorus hesperius | Bark And Ambrosia Beetle |
| Pityophthorus intextus | Bark And Ambrosia Beetle |
| Pityophthorus murrayanae | Bark And Ambrosia Beetle |
| Pityophthorus nitidulus | Bark And Ambrosia Beetle |
| Pityophthorus nitidus | Bark And Ambrosia Beetle |
| Pityophthorus opaculus | Bark And Ambrosia Beetle |
| Pityophthorus orarius | Bark And Ambrosia Beetle |
| Pityophthorus pseudotsugae | Bark And Ambrosia Beetle |
| Pityophthorus pulchellus | Bark And Ambrosia Beetle |
| Pityophthorus recens | Bark And Ambrosia Beetle |
| Pityophthorus scalptor | Bark And Ambrosia Beetle |
| Pityophthorus scalptus | Bark And Ambrosia Beetle |
| Pityophthorus serratus | Bark And Ambrosia Beetle |
| Pityophthorus sierrensis | Bark And Ambrosia Beetle |
| Pityophthorus toralis | Bark And Ambrosia Beetle |
| Pityophthorus tuberculatus | Bark And Ambrosia Beetle |
| Pityophthorus venustus | Bark And Ambrosia Beetle |
| Placobdella montifera | Freshwater Leech |
| Placobdella ornata | Freshwater Leech |
| Placusa incompleta | rove beetle |
| Placusa petulans | Rove Beetle |
| Placusa pseudosuecica | Rove Beetle |
| Placusa tachyporoides | Rove Beetle |
| Placusa tacomae | Rove Beetle |
| Placusa turbata | Rove Beetle |
| Placusa vaga | rove beetle |
| Plagioecia patina | Bryozoa |
| Plagioecia sarniensis | Bryozoa |
| Plagiognathus alboradialis | True Bug |
| Plagiognathus annulatus | True Bug |
| Plagiognathus arbustorum | True Bug |
| Plagiognathus brunneus | True Bug |
| Plagiognathus chrysanthemi | True Bug |
| Plagiognathus davisi | True Bug |
| Plagiognathus fumidus | True Bug |
| Plagiognathus fusciflavus | True Bug |
| Plagiognathus fuscosus | True Bug |
| Plagiognathus fuscotibialis | True Bug |
| Plagiognathus laricicola | True Bug |
| Plagiognathus moerens | True Bug |
| Plagiognathus mundus | True Bug |
| Plagiognathus obscurus obscurus | True Bug |
| Plagiognathus ribesi | True Bug |
| Plagiognathus shoshonea | True Bug |
| Plagiognathus suffuscipennis | True Bug |
| Plakina monolopha | Sponge |
| Planctoteuthis oligobessa | Chiroteuthid Squid |
| Planes cyaneus | Flotsam Cram |
| Planes marinus | Drifter Crab |
| Planolinellus vittatus | Hide Beetle |
| Planolinoides borealis | Hide Beetle |
| Planolinoides duplex | Scarab Beetle |
| Planolinoides pectoralis | Hide Beetle |
| Planolinus tenellus | Hide Beetle |
| Planorbula armigera | Thicklip Ramshorn |
| Platambus glabrellus | Beetle |
| Platambus sculpturellus | Beetle |
| Plateros lictor | Net-winged Beetle |
| Plateros peregrinus | Net-winged Beetle |
| Plateumaris chalcea | Leaf Beetle |
| Plateumaris dubia | Aquatic Leaf Beetle |
| Plateumaris flavipes | Leaf Beetle |
| Plateumaris frosti | Aquatic Leaf Beetle |
| Plateumaris fulvipes | Aquatic Leaf Beetle |
| Plateumaris germari | Aquatic Leaf Beetle |
| Plateumaris nitida | Aquatic Leaf Beetle |
| Plateumaris pusilla | Aquatic Leaf Beetle |
| Plateumaris robusta | Aquatic Leaf Beetle |
| Plateumaris shoemakeri | Aquatic Leaf Beetle |
| Platidia horni | Round Tiny Articulate Platidia Lamp Shell |
| Platidiolus vandykei | Round Sand Beetle |
| Platnickina tincta | Spider |
| Platphalonia lavana | Moth |
| Platyceropsis keeni | Stag Beetle |
| Platycerus depressus | Stag Beetle |
| Platycerus marginalis | Stag Beetle |
| Platycerus oregonensis | Stag Beetle |
| Platycerus piceus | Stag Beetle |
| Platycotis humilis | True Bug |
| Platycotis lineosa | True Bug |
| Platydema americanum | Comb-clawed Beetle |
| Platydema neglectum | Darkling Beetle |
| Platydema oregonense | Comb-clawed Beetle |
| Platydracus rutilicauda | Rove Beetle |
| Platydracus tarsalis | Large Rove Beetle |
| Platygobio gracilis | Flathead Chub |
| Platyhydnobius arizonensis | Small Carrion Beetle |
| Platylomalus aequalis | Clown Beetle |
| Platylygus luridus | True Bug |
| Platylygus piceicola | True Bug |
| Platylygus pseudotsugae | True Bug |
| Platylygus rolfsi | True Bug |
| Platylygus rubripes | True Bug |
| Platymera gaudichaudi | Two-Spine Crab |
| Platymetopius twiningi | True Bug |
| Platymetopius vitellina | True Bug |
| Platynereis bicanaliculata | Polychaete Worm |
| Platynota stultana | Moth |
| Platynus ovipennis | Long-necked Ground Beetle |
| Platypedia areolata | Cicada |
| Platypedia putnami | Cicada |
| Platypolia anceps | Cutworm Moth |
| Platypolia loda | Cutworm Moth |
| Platypolia mactata | Moth |
| Platypsyllus castoris | Round Fungus Beetle |
| Platyptilia albicans | White-banded Plume Moth |
| Platyptilia ardua | Lofty Plume Moth |
| Platyptilia comstocki | Williams' Plume Moth |
| Platyptilia percnodactylus | Aquiline Plume Moth |
| Platyptilia tesseradactyla | Pussytoes Plume Moth |
| Platysoma coarctatum | Clown Beetle |
| Platysoma lecontei | Clown Beetle |
| Platysoma leconti | Clown Beetle |
| Platysoma punctigerum | Clown Beetle |
| Platystethus americanus | Spiny-legged Rove Beetle |
| Plebejus glandon lacustris | Arctic Blue |
| Plebejus lupini lutzi | Acmon Blue |
| Plebejus melissa melissa | Melissa's Blue |
| Plebejus optilete yukona | Cranberry Blue |
| Plebejus saepiolus insulanus | Greenish Blue |
| Plectobranchus evides | Bluebarred Prickleback |
| Plectrura spinicauda | Twig Girdling Beetle |
| Plegaderus comonforti | Clown Beetle |
| Plegaderus consors | Clown Beetle |
| Plegaderus fraternus | Clown Beetle |
| Plegaderus molestus | Clown Beetle |
| Plegaderus nitidus | Clown Beetle |
| Plegaderus sayi | Clown Beetle |
| Plegaderus setulosus | Clown Beetle |
| Pleotrichophorus amsinckii | True Bug |
| Pleotrichophorus chrysanthemi | True Bug |
| Pleotrichophorus elongatus | True Bug |
| Pleotrichophorus gnaphalodes | True Bug |
| Pleotrichophorus longipes | True Bug |
| Pleromelloida bonuscula | Cutworm Moth |
| Plesiocis cribrum | Minute Tree-fungus Beetle |
| Pleurophorus caesus | Hide Beetle |
| Pleurota albastrigulella | Moth |
| Pleusirus secorrus | Amphipod |
| Pleustes (Catopleustes) victoriae | Amphipod |
| Plinthodes taeniatus | Broad-nosed Weevil |
| Plocamaphis flocculosa | True Bug |
| Plocamiancora igzo | Sponge |
| Plocamionida lyoni | Sponge |
| Plotocnide borealis | Jellyfish |
| Plotohelmis tenuis | Polychaete Worm |
| Plumatella emarginata | Bryozoa |
| Plumatella fruticosa | Bryozoa |
| Plumatella rugosa | Bryozoa |
| Plumiperla diversa | Stonefly |
| Plumohyale plumulosa | Amphipod |
| Plusia magnimacula | Large-spotted Looper |
| Plutella armoraciae | Moth |
| Pocadicnemis americana | Sheetweb Spider |
| Pocadicnemis pumila | Sheetweb Spider |
| Pocadius fulvipennis | Pollen Beetle |
| Pocadius helvolus | Sap-Feeding Beetle |
| Pococera asperatella | Maple Webworm |
| Pococera expandens | Striped Oak Webworm |
| Pococera provoella | Moth |
| Pococera thoracicella | Moth |
| Podabrus cascadensis | Soldier Beetle |
| Podabrus deceptus | Soldier Beetle |
| Podabrus excursus excursus | Soldier Beetle |
| Podabrus extremus | Soldier Beetle |
| Podabrus falli | Soldier Beetle |
| Podabrus furtivus | Soldier Beetle |
| Podabrus heteronychus | Soldier Beetle |
| Podabrus instabilis | Soldier Beetle |
| Podabrus laevicollis | Soldier Beetle |
| Podabrus lutosus | Soldier Beetle |
| Podabrus lygarius | Soldier Beetle |
| Podabrus obscurevittatus | Soldier Beetle |
| Podabrus pustulatus | Soldier Beetle |
| Podabrus rossi | Soldier Beetle |
| Podabrus smithi | Soldier Beetle |
| Podabrus tetragonoderus | Soldier Beetle |
| Podalonia luctuosa | Wasp |
| Podalonia mexicana | Wasp |
| Podisus placidus | True Bug |
| Podisus serieventris | True Bug |
| Podmosta decepta | Stonefly |
| Podmosta delicatula | Stonefly |
| Podoceropsis angustimana | Amphipod |
| Podoceropsis barnardi | Amphipod |
| Podoceropsis chionoecetophila | Amphipod |
| Podocerus cristatus | Amphipod |
| Podocerus spongicolus | Amphipod |
| Podocotyle atomon | Parasite |
| Podocotyle gibbonsia | Parasite |
| Podocotyle pedunculata | Parasite |
| Podocotyle reflexa | Parasite |
| Podocotyle sinusacca | Parasite |
| Podocotyle wilsoni | Parasite |
| Podosesia syringae | Ash Borer |
| Poecillastra japonica | Sponge |
| Poecillastra tenuilaminaris | Sponge |
| Poecilobrium chalybeum | Oak Borer |
| Poeciloneta aggressa | Sheetweb Spider |
| Poeciloneta bihamata | Sheetweb Spider |
| Poeciloneta calcaratus | Sheetweb Spider |
| Poeciloneta canionis | Sheetweb Spider |
| Poeciloneta fructuosa | Sheetweb Spider |
| Poeciloneta lyrica | Spider |
| Poeciloneta petrophila | Sheetweb Spider |
| Poeciloneta variegata | Spider |
| Poecilonota ferrea | Metallic Wood-boring Beetle |
| Poecilonota fraseri | Metallic Wood-boring Beetle |
| Poecilonota montana | Metallic Wood-boring Beetle |
| Poecilus scitulus | Ground Beetle |
| Pogonocherus mixtus | Twig Girdling Beetle |
| Pogonocherus penicillatus | Twig Girdling Beetle |
| Pogonocherus pictus | Twig Girdling Beetle |
| Pogonocherus propinquus | Twig Girdling Beetle |
| Pogonomyrmex salinus | Harvester Ant |
| Pogonosoma ridingsi | Robber Fly |
| Pokabius eremus | Centipede |
| Polia discalis | Cutworm Moth |
| Polia imbrifera | Cutworm Moth |
| Polia nugatis | Cutworm Moth |
| Polia propodea | Cutworm Moth |
| Polia rogenhoferi | Cutworm Moth |
| Poliaenus oregonus | Twig Girdling Beetle |
| Polites sabuleti sabuleti | Sandhill Skipper |
| Polites sonora sonora | Sonora Skipper |
| Polites themistocles themistocles | Tawny-Edged Skipper |
| Polopeustis arctiella | Moth |
| Polyacanthonotus challengeri | Longnose Tapirfish |
| Polycentropus albipunctus | Caddisfly |
| Polycentropus cinereus | Caddisfly |
| Polycentropus flavus | Caddisfly |
| Polycentropus halidus | Caddisfly |
| Polycentropus interruptus | Caddisfly |
| Polycentropus remotus | Caddisfly |
| Polycentropus smithae | Caddisfly |
| Polycentropus weedi | Caddisfly |
| Polycera tricolor | Three Colored Polycera |
| Polycheria carinata | Amphipod |
| Polycheria mixillae | Amphipod |
| Polycheria osborni | Amphipod |
| Polycirrus californicus | Polychaete Worm |
| Polydelphis anoura | Parasite |
| Polydesmus angustus | Flat-backed Millipede |
| Polydesmus inconstans | Millipede |
| Polydora alloporis | Polychaete Worm |
| Polydora cornuta | Polychaete Worm |
| Polydora limicola | Polychaete Worm |
| Polydora pygidialis | Polychaete Worm |
| Polydora spongicola | Polychaete Worm |
| Polydora websteri | Polychaete Worm |
| Polydrusus formosus | Broad-nosed Weevil |
| Polyeunoa tuta | Polychaete Worm |
| Polygraphus convexifrons | Bark And Ambrosia Beetle |
| Polygraphus rufipennis | Foureyed Spruce Bark Beetle |
| Polymerus basivittis pallidulus | True Bug |
| Polymerus chrysopsis | True Bug |
| Polymerus cognatus | True Bug |
| Polymerus diffusus | True Bug |
| Polymerus rufipes | True Bug |
| Polymerus tumidifrons | True Bug |
| Polymerus unifasciatus | True Bug |
| Polymerus venaticus | True Bug |
| Polymerus vulneratus | True Bug |
| Polynoe canadensis | Polychaete Worm |
| Polynoe gracilis | Polychaete Worm |
| Polyphylla crinita | Lined June Beetle |
| Polystoechotes punctatus | Giant Lacewing |
| Pomphorhynchus bulbocolli | Parasite |
| Ponometia elegantula | Arizona Bird-dropping Moth |
| Ponometia nigra | Moth |
| Ponometia semiflava | Half-yellow Moth |
| Ponometia tortricina | Moth |
| Pontia protodice | Checkeredwhite |
| Pontogeneia inermis | Amphipod |
| Pontogeneia intermedia | Amphipod |
| Pontogeneia ivanovi | Amphipod |
| Pontogeneia rostrata | Amphipod |
| Pontomalota luctuosa | Rove Beetle |
| Pontomalota opaca | Rove Beetle |
| Pontoporeia femorata | Amphipod |
| Popillia japonica | Japanese Beetle |
| Porella acutirostris | Bryozoa |
| Porella columbiana | Bryozoa |
| Porella concinna | Bryozoa |
| Porella porifera | Bryozoa |
| Poromitra crassiceps | Crested Ridgehead |
| Porophila malkini | Featherwinged Beetle |
| Porotachys bisulcatus | Round Sand Beetle |
| Porrhodites fenestralis | Rove Beetle |
| Porrhodites inflatus | Ocellate Rove Beetle |
| Porrhomma convexum | Sheetweb Spider |
| Porrhomma terrestre | Sheetweb Spider |
| Porrocaecum depressum | Parasite |
| Potamilla intermedia | Polychaete Worm |
| Potamilla myriops | Polychaete Worm |
| Potamilla neglecta | Polychaete Worm |
| Potamilla occelata | Polychaete Worm |
| Potamocypris granulosa | Seed Shrimp |
| Potamocypris pallida | Seed Shrimp |
| Potamocypris unicaudata | Seed Shrimp |
| Potamonectes deceptus | Predacious Diving Beetle |
| Potamonectes elegans | Predacious Diving Beetle |
| Potamonectes spenceri | Predacious Diving Beetle |
| Pourtalesia tanneri | Deep Sea Urchin |
| Pourtalesia thomsoni | Deep Sea Urchin |
| Praestigia kulczynskii | Sheetweb Spider |
| Prairiana cinerea | True Bug |
| Prasocuris boreella | Scriptured Leaf Beetle |
| Prasocuris phellandrii | Scriptured Leaf Beetle |
| Prasocuris vittata | Scriptured Leaf Beetle |
| Praxillella affinis affinis | Polychaete Worm |
| Praxillella affinis pacifica | Polychaete Worm |
| Praxillella gracilis | Polychaete Worm |
| Praxillella praetermissa | Polychaete Worm |
| Praya dubia | Jellyfish |
| Praya reticulata | Jellyfish |
| Prays fraxinella | Moth |
| Prepops bivittis | True Bug |
| Prepops borealis | True Bug |
| Prepops nigripilus | True Bug |
| Prepops rubellicollis | True Bug |
| Priacma serrata | Reticulated Beetle |
| Primno abyssalis | Amphipod |
| Priognathus monilicornis | Dead Log Beetle |
| Prionace glauca | Blue Shark |
| Prionocypris canadensis | Seed Shrimp |
| Prionosoma podopioides | True Bug |
| Prionospio lighti | Polychaete Worm |
| Prionospio steenstrupi | Polychaete Worm |
| Prionoxystus robiniae | Carpenterworm |
| Prionus lecontei | Pole Borer |
| Pristigloma nitens | Clam |
| Pristiloma arcticum | Northern Tightcoil |
| Pristiloma chersinella | Black-Footed Tightcoil |
| Pristiloma johnsoni | Broadwhorl Tightcoil |
| Pristiloma lansingi | Denticulate Tightcoil |
| Pristiphora erichsonii | Larch Sawfly |
| Pristoceuthophilus cercalis | Cave Cricket |
| Pristoceuthophilus pacificus | Cave Cricket |
| Proboscina major | Bryozoa |
| Procephalothrix spiralis | Ribbon Worm |
| Prochoerodes amplicineraria | Moth |
| Prochoerodes forficaria | Moth |
| Prochoerodes lineola | Large Maple Spanworm Moth |
| Prochoreutis inflatella | Skullcap Skeletonizer |
| Prochoreutis pernivalis | Moth |
| Prociphilus americanus | True Bug |
| Prociphilus caryae | True Bug |
| Prociphilus caryae fitchii | True Bug |
| Prociphilus corrugatans | True Bug |
| Prociphilus xylostei | True Bug |
| Proclea graffi | Polychaete Worm |
| Procloeon bellum | Mayfly |
| Procloeon implicatum | Mayfly |
| Procryphalus mucronatus | Bark And Ambrosia Beetle |
| Procryphalus utahensis | Palm Seed Borer |
| Proctorus armatus | Snout Beetle |
| Profilicollis botulus | Parasite |
| Profilicollis diploinflatus | Parasite |
| Profilicollis marilis | Parasite |
| Profilicollis minutus | Parasite |
| Profilicollis obtusus | Parasite |
| Prognorisma substrigata | Cutworm Moth |
| Prokelisia carolae | True Bug |
| Prokelisia salina | True Bug |
| Prolita princeps | Moth |
| Prolita recens | Moth |
| Prolita variabilis | Moth |
| Promecotarsus densus | Nut and Acorn Weevil |
| Promylea lunigerella | Moth |
| Pronocera collaris collaris | Elderberry Longhorn Beetle |
| Pronoctua craboi | Cutworm Moth |
| Pronoctua peabodyae | Cutworm Moth |
| Pronoctua typica | Cutworm Moth |
| Pronoprymna petrowi | Parasite |
| Pronotocrepis clavicornis | True Bug |
| Properigea albimacula | Cutworm Moth |
| Prorasea praeia | Moth |
| Prorasea simalis | Moth |
| Prorella leucata | Moth |
| Prorella mellisa | Moth |
| Prorutidosoma decipiens | Minute Seed Weevil |
| Prosopium coulterii | Pygmy Whitefish |
| Prosopium cylindraceum | Round Whitefish |
| Prosorhynchoides basargini | Parasite |
| Prosorhynchus apertus | Parasite |
| Prosorhynchus crucibulum | Parasite |
| Prosorhynchus scalpellus | Parasite |
| Prosternon bombycinum | Glowing Click Beetle |
| Prosternon viduum | Glowing Click Beetle |
| Prosthorhynchus formosum | Parasite |
| Prostoia besametsa | Stonefly |
| Prostomis americanus | Jugular-horned Beetle |
| Proteinus atomarius | Rove Beetle |
| Proteinus basalis | Flat Rove Beetle |
| Proteinus brachypterus | Flat Rove Beetle |
| Proteinus collaris | Flat Rove Beetle |
| Proteinus densipennis | Rove Beetle |
| Proteinus limbatus | Flat Rove Beetle |
| Proteocephalus neglectus | Parasite |
| Proteocephalus ptychocheilus | Parasite |
| Proteocephalus salmonidicola | Parasite |
| Proteoteras arizonae | Western Boxelder Twig Borer |
| Proteoteras obnigrana | Moth |
| Proteoteras willingana | Eastern Boxelder Twig Borer |
| Protoaricella oligobranchia | Polychaete Worm |
| Protochauliodes spenceri | Fishfly |
| Protodorvillea kefersteini | Polychaete Worm |
| Protodrillus flabelliger | Polychaete Worm |
| Protodriloides chaetifer | Polychaete Worm |
| Protohyale frequens | Amphipod |
| Protohyale intermedia | Amphipod |
| Protohyale oclairi | Amphipod |
| Protohyale seticornis | Amphipod |
| Protohyale spinosa | Amphipod |
| Protolafystius madillae | Amphipod |
| Protolampra brunneicollis | Brown-collared Dart |
| Protolithocolletis lathyri | Moth |
| Protomyctophum crockeri | California Flashlightfish |
| Protomyctophum thompsoni | Northern Flashlightfish |
| Protoperigea anotha | Cutworm Moth |
| Protoperigea posticata | Cutworm Moth |
| Protoperigea umbricata | Moth |
| Protoptila tenebrosa | Caddisfly |
| Protorthodes curtica | Cutworm Moth |
| Protorthodes oviduca | Cutworm Moth |
| Protorthodes rufula | Cutworm Moth |
| Protoschinia nuchalis | Moth |
| Protostrongylus stilesi | Parasite |
| Proutianus americanus | False Click Beetle |
| Proxenus mendosa | Cutworm Moth |
| Prunella montanella | Siberian Accentor |
| Psallovius nigroantennatus | True Bug |
| Psallovius piceicola | True Bug |
| Psallus aethiops | True Bug |
| Psallus betuleti | True Bug |
| Psallus falleni | True Bug |
| Psallus haematodes | True Bug |
| Psallus kimi | True Bug |
| Psallus parshleyi | True Bug |
| Psammodius caelatus | Scarab Beetle |
| Psammodius oregonensis | Scarab Beetle |
| Psammonyx longimerus | Amphipod |
| Psammopolia arietis | Moth |
| Psammopolia wyatti | Moth |
| Psammostiba comparabilis | Rove Beetle |
| Psammotettix attenuens | True Bug |
| Psammotettix beirnei | True Bug |
| Psammotettix confinis | True Bug |
| Psammotettix dentatus | True Bug |
| Psammotettix knullae | True Bug |
| Psammotettix latipex | True Bug |
| Psammotettix lividellus | True Bug |
| Psathyrometra fragilis | Fragile Feather Star |
| Pselliopus spinicollis | True Bug |
| Psettarium sebastodorum | Parasite |
| Pseudacanthocotyla pacifica | Parasite |
| Pseudacanthocotyla williamsi | Parasite |
| Pseudanarta flava | Moth |
| Pseudanchus aeneolus | Ground Beetle |
| Pseudanchus quadratus | Ground Beetle |
| Pseudanostirus hoppingi | Glowing Click Beetle |
| Pseudanostirus laricis | Glowing Click Beetle |
| Pseudanostirus nebraskensis | Glowing Click Beetle |
| Pseudanostirus nigricollis | Glowing Click Beetle |
| Pseudanostirus ochreipennis | Glowing Click Beetle |
| Pseudanostirus propolus columbianus | Beetle |
| Pseudanostirus propolus propolus | Beetle |
| Pseudanostirus pudicus | Glowing Click Beetle |
| Pseudanostirus triundulatus | Three-spotted Click Beetle |
| Pseudanostirus watsoni | Watson's Click Beetle |
| Pseudanthonomus validus | Minute Seed Weevil |
| Pseudarchaster dissonus | Sea Star |
| Pseudeurostus hilleri | Death-watch Beetle |
| Pseudeva palligera | Cutworm Moth |
| Pseudeva purpurigera | Straight-lined Looper Moth |
| Pseudexentera maracana | Moth |
| Pseudexentera oregonana | Moth |
| Pseudharpinia inexpectata | Amphipod |
| Pseudione galacanthae | Squat Lobster Parasitic Isopod |
| Pseudione giardi | Hermit Crab Parasitic Isopod |
| Pseudips concinnus | Cedar Bark Beetle |
| Pseudips mexicanus | Cedar Bark Beetle |
| Pseudobathylagus milleri | Stout Blacksmelt |
| Pseudocercidis rosae | True Bug |
| Pseudoceros canadensis | Compound Tunicate Flatworm |
| Pseudoceros luteus | White Flatworm |
| Pseudochama granti | Clam |
| Pseudochorthippus curtipennis curtipennis | Grasshopper |
| Pseudocistela pectinata | Darkling Beetle |
| Pseudocnemodus canadensis | True Bug |
| Pseudococcus affinis | True Bug |
| Pseudococcus comstocki | True Bug |
| Pseudococcus maritimus | True Bug |
| Pseudodelphis oligocotti | Parasite |
| Pseudohadrotoma kaliki | Carpet Beetle |
| Pseudohadrotoma perversa | Carpet Beetle |
| Pseudohaida rothi | Rove Beetle |
| Pseudohermonassa bicarnea | Pink-spotted Dart |
| Pseudohermonassa flavotincta | Cutworm Moth |
| Pseudoholostrophus impressicollis | Polypore Fungus Beetle |
| Pseudohylesinus dispar dispar | Bark And Ambrosia Beetle |
| Pseudohylesinus dispar pullatus | Bark And Ambrosia Beetle |
| Pseudohylesinus granulatus | Bark and Ambrosia Beetle |
| Pseudohylesinus nobilis | Bark And Ambrosia Beetle |
| Pseudohylesinus pini | Bark and Ambrosia Beetle |
| Pseudohylesinus sericeus | Bark and Ambrosia Beetle |
| Pseudohylesinus sitchensis | Bark And Ambrosia Beetle |
| Pseudohylesinus tsugae | Bark and Ambrosia Beetle |
| Pseudoklossia semiluna | Parasite |
| Pseudolathra oregonensis | Rove Beetle |
| Pseudoliropus vanus | Amphipod |
| Pseudoluperus lecontii | Leaf Beetle |
| Pseudoluperus longulus | Leaf Beetle |
| Pseudomedon capitulus | Rove Beetle |
| Pseudomedon obsoletus | Rove Beetle |
| Pseudomurraytrema copulatum | Parasite |
| Pseudonototanais filum | Isopod |
| Pseudopecoelus vancouveri | Parasite |
| Pseudopentaceros wheeleri | North Pacific Pelagic Armorhead |
| Pseudopityophthorus pubipennis | Bark And Ambrosia Beetle |
| Pseudopolydora kempi japonica | Polychaete Worm |
| Pseudopostega cretea | Moth |
| Pseudopsallus occidentalis | True Bug |
| Pseudopsis montoraria | Rove Beetle |
| Pseudopsis obliterata | Rove Beetle |
| Pseudopsis sagitta | Ant-loving Beetle |
| Pseudorhynchus concisus | Cricket |
| Pseudosciaphila duplex | Poplar Leafroller |
| Pseudostenophylax edwardsi | Caddisfly |
| Pseudostichopus mollis | Potato Sea Cucumber |
| Pseudostichopus tuberosus | Sea Cucumber |
| Pseudostylochus ostreophagus | Bivalve Flatworm |
| Pseudosuccinea columella | Mimic Lymnaea |
| Pseudota cornicula | Rove Beetle |
| Pseudota formalis | Rove Beetle |
| Pseudota irrupta | Rove Beetle |
| Pseudota nanulina | Rove Beetle |
| Pseudota nescia | Rove Beetle |
| Pseudota vana | Rove Beetle |
| Pseudotanais oculatus | Isopod |
| Pseudotaranis strongi | Sea Snail |
| Pseudoterranova decipiens | Parasite |
| Pseudothyone levini | Levin's Sea Cucumber |
| Pseudothyris sepulchralis | Mournful Thyris Moth |
| Psilaster pectinatus | Sea Star |
| Psiloscelis subopaca | Clown Beetle |
| Psoloessa delicatula | Brown-spotted Grasshopper |
| Psorosina hammondi | Moth |
| Psyche casta | Common Bagworm |
| Psychoglypha alascensis | Caddisfly |
| Psychoglypha bella | Caddisfly |
| Psychoglypha prita | Caddisfly |
| Psychoglypha rossi | Caddisfly |
| Psychoglypha schmidi | Caddisfly |
| Psychoglypha subborealis | Caddisfly |
| Psychophora phocata | Moth |
| Psychophora suttoni | Moth |
| Psylla alni | True Bug |
| Psylla caudata | True Bug |
| Psylla floccosa | True Bug |
| Psylla sanguinea | True Bug |
| Psylla viridescens | True Bug |
| Psylliodes convexior | Skeletonizing Leaf Beetles and Flea Beetle |
| Psylliodes punctulatus | Metallic Blue-green FleBeetle |
| Psyllopsis fraxini | True Bug |
| Psyllopsis fraxinicola | True Bug |
| Ptenidium nitidum | Featherwinged Beetle |
| Ptenidium pullum | Feather-Winged Beetle |
| Ptenidium pusillum | Feather-Winged Beetle |
| Ptenidium ulkei | Feather-Winged Beetle |
| Pteraster jordani | Cushion Star |
| Pterocallis alni | True Bug |
| Pterocallis alnifoliae | True Bug |
| Pterocomma beulahensis | True Bug |
| Pterocomma medium | True Bug |
| Pterocomma pilosum | True Bug |
| Pterocomma populeum | True Bug |
| Pterocomma populifoliae | True Bug |
| Pterocomma salicis | True Bug |
| Pterocomma sanguiceps | True Bug |
| Pterocomma smithiae | True Bug |
| Pterodroma cookii | Cook's Petrel |
| Pterodroma sandwichensis | Hawaiian Petrel |
| Pterodroma ultima | Murphy's Petrel |
| Pterolonche inspersa | Brown-winged Knapweed Root Moth |
| Pteronarcella badia | Stonefly |
| Pterostichus arcticola | Ground Beetle |
| Pterostichus brevicornis brevicornis | Beetle |
| Pterostichus castaneus | Ground Beetle |
| Pterostichus caudicalis | Ground Beetle |
| Pterostichus chipewyan | Ground Beetle |
| Pterostichus commutabilis | Ground Beetle |
| Pterostichus corvinus | Ground Beetle |
| Pterostichus ecarinatus | Ground Beetle |
| Pterostichus empetricola | Ground Beetle |
| Pterostichus femoralis | Ground Beetle |
| Pterostichus hudsonicus | Ground Beetle |
| Pterostichus leconteianus | Ground Beetle |
| Pterostichus luctuosus | Ground Beetle |
| Pterostichus lustrans | Ground Beetle |
| Pterostichus mandibularoides | Ground Beetle |
| Pterostichus melanarius melanarius | Common Black Ground Beetle |
| Pterostichus mutus | Ground Beetle |
| Pterostichus nigrocaeruleus | Ground Beetle |
| Pterostichus nigrocoeruleus | Ground Beetle |
| Pterostichus oregonus | Ground Beetle |
| Pterostichus pensylvanicus | Ground Beetle |
| Pterostichus protractus | Ground Beetle |
| Pterostichus pumilus pumilus | Beetle |
| Pterostichus punctatissimus | Ground Beetle |
| Pteryngium crenatum | Silken Fungus Beetle |
| Ptilichthys goodei | Quillfish |
| Ptilinus basalis | Death-watch Beetle |
| Ptilinus lobatus | Deathwatch Beetle |
| Ptiliola kunzei | Featherwinged Beetle |
| Ptiliolum columbianum | Feather-Winged Beetle |
| Ptiliolum fuscum | Featherwinged Beetle |
| Ptiliolum obscurum | Feather-Winged Beetle |
| Ptiliolum sharpi | Feather-Winged Beetle |
| Ptilocrinus pinnatus | Five-Armed Sea Lily |
| Ptilodactyla serricollis | Toe-winged Beetle |
| Ptilostomis semifasciata | Caddisfly |
| Ptinus bicinctus | Spider Beetle |
| Ptinus californicus | Death-watch Beetle |
| Ptinus clavipes | Brown Spider Beetle |
| Ptinus fallax | Death-watch Beetle |
| Ptinus fur | Whitemarked Spider Beetle |
| Ptinus latro | Spider Beetle |
| Ptinus ocellus | Australian Spider Beetle |
| Ptinus raptor | Spider Beetle |
| Ptinus tectus | Australian Spider Beetle |
| Ptinus villiger | Hairy Spider Beetle |
| Ptomaphagus nevadicus | Small Carrion Beetle |
| Ptychogena californica | Jellyfish |
| Ptychogena lactea | Jellyfish |
| Puellina setosa | Bryozoa |
| Puffinus opisthomelas | Black-Vented Shearwater |
| Pulvinaria innumerabilis | True Bug |
| Pulvinaria occidentalis | True Bug |
| Puncturella cooperi | Keyhole Limpet |
| Pungitius pungitius | Ninespine Stickleback |
| Purshivora pubescens | True Bug |
| Puto cupressi | True Bug |
| Pycnoscelus surinamensis | Surinam Cockroach |
| Pygolampis sericea | True Bug |
| Pygoleptura carbonata | Elderberry Longhorn Beetle |
| Pygoleptura nigrella nigrella | Longhorned Beetle |
| Pygospio californica | Polychaete Worm |
| Pygospio elegans | Polychaete Worm |
| Pyla aeneoviridella | Moth |
| Pyla aenigmatica | Moth |
| Pyla aequivoca | Moth |
| Pyla criddlella | Moth |
| Pyla fasciolalis | Moth |
| Pyla fusca | Speckled Black Pyla |
| Pyla hanhamella | Moth |
| Pyla hypochalciella | Moth |
| Pyla impostor | Moth |
| Pyla insinuatrix | Moth |
| Pyla rainierella | Moth |
| Pyla scintillans | Moth |
| Pyla serrata | Moth |
| Pyramidobela quinquecristata | Moth |
| Pyrausta borealis | Northern Pyrausta |
| Pyrausta signatalis | Raspberry Pyrausta |
| Pyrausta socialis | Sociable Pyrausta |
| Pyrausta subsequalis | Moth |
| Pyrausta tuolumnalis | Moth |
| Pyrgus communis communis | Checkeredskipper |
| Pyrgus ruralis ruralis | Two-Banded Checkeredskipper |
| Pyropyga nigricans | Diurnal Fireflie |
| Pyroteuthis addolux | Squid |
| Pyrotrichus vitticollis | Longhorned Beetle |
| Pytho americanus | Dead Log Beetle |
| Pytho niger | Dead Log Beetle |
| Pytho seidlitzi | Dead Log Beetle |
| Quadraspidiotus gigas | True Bug |
| Quadraspidiotus juglansregiae | True Bug |
| Quadraspidiotus ostreaeformis | True Bug |
| Quadraspidiotus perniciosus | True Bug |
| Quadrimaera carla | Amphipod |
| Quedius aenescens | Large Rove Beetle |
| Quedius breviceps | Rove Beetle |
| Quedius brunnipennis | Large Rove Beetle |
| Quedius caseyi divergens | Large Rove Beetle |
| Quedius charactus | Large Rove Beetle |
| Quedius crescenti | Rove Beetle |
| Quedius criddlei | Large Rove Beetle |
| Quedius curtipennis | Large Rove Beetle |
| Quedius densiventris | Large Rove Beetle |
| Quedius elevatus | Large Rove Beetle |
| Quedius erythrogaster | Large Rove Beetle |
| Quedius explanatus | Rove Beetle |
| Quedius fellmani | Rove Beetle |
| Quedius frater | Rove Beetle |
| Quedius frigidus | Rove Beetle |
| Quedius fulgidus | Rove Beetle |
| Quedius fulvicollis | Large Rove Beetle |
| Quedius griffinae | Large Rove Beetle |
| Quedius horni | Large Rove Beetle |
| Quedius impar | Rove Beetle |
| Quedius incisus | Rove Beetle |
| Quedius labradorensis labradorensis | Rove Beetle |
| Quedius lanei | Large Rove Beetle |
| Quedius limbifer | Large Rove Beetle |
| Quedius mesomelinus | Large Rove Beetle |
| Quedius mesomelinus mesomelinus | Beetle |
| Quedius molochinoides molochinoides | Rove Beetle |
| Quedius montivagus | Rove Beetle |
| Quedius mordax | Large Rove Beetle |
| Quedius nanulus | Large Rove Beetle |
| Quedius nevadensis | Large Rove Beetle |
| Quedius oculeus | Large Rove Beetle |
| Quedius pediculus | Large Rove Beetle |
| Quedius pellax | Rove Beetle |
| Quedius plagiatus | Large Rove Beetle |
| Quedius prostans | Large Rove Beetle |
| Quedius pullmani | Large Rove Beetle |
| Quedius puncticeps | Rove Beetle |
| Quedius rainieri | Rove Beetle |
| Quedius rusticus | Rove Beetle |
| Quedius seriatus | Large Rove Beetle |
| Quedius simplex | Rove Beetle |
| Quedius simulator | Large Rove Beetle |
| Quedius spelaeus spelaeus | Rove Beetle |
| Quedius sublimbatus | Large Rove Beetle |
| Quedius tahomae | Rove Beetle |
| Quedius tetricus | Rove Beetle |
| Quedius transparens | Rove Beetle |
| Quedius uteanus divergens | Beetle |
| Quedius uteanus uteanus | Beetle |
| Quedius velox | Rove Beetle |
| Quedius vilis | Large Rove Beetle |
| Questa caudicirra | Polychaete Worm |
| Radulinus asprellus | Slim Sculpin |
| Radulinus boleoides | Darter Sculpin |
| Ragonotia dotalis | Moth |
| Rajonchocotyle butis | Parasite |
| Ramellogammarus columbianus | Amphipod |
| Ramellogammarus vancouverensis | Amphipod |
| Raphiptera argillaceellus | Diminutive Grass-veneer |
| Recurvaria nanella | Lesser Bud Moth |
| Reesa vespulae | Carpet Beetle |
| Reginella furcata | Bryozoa |
| Reichenbachia albionica | Short-winged Mold Beetle |
| Reichenbachia binodifer | Short-winged Mold Beetle |
| Reichenbachia spatulifer | Ant-loving Beetle |
| Remora australis | Whalesucker |
| Remus mutatus | Rove Beetle |
| Renardia nigrella | Unmargined Rove Beetle |
| Resapamea venosa | Moth |
| Reticulitermes hesperus | Western Subterranean Termite |
| Retinia albicapitana | Northern Pitch Twig Moth |
| Retinia burkeana | Moth |
| Retinia metallica | Moth |
| Rhabdochona acus | Parasite |
| Rhabdochona canadensis | Parasite |
| Rhabdochona cascadilla | Parasite |
| Rhabdochona cotti | Parasite |
| Rhabdochona kisutchi | Parasite |
| Rhabdochona milleri | Parasite |
| Rhachotropis americana | Amphipod |
| Rhachotropis boreopacifica | Amphipod |
| Rhachotropis conlanae | Amphipod |
| Rhachotropis inflata | Amphipod |
| Rhachotropis minuta | Amphipod |
| Rhagea packardella | Moth |
| Rhagoletis pomonell | Apple Maggot |
| Rhagonycha excavata | Soldier Beetle |
| Rhagonycha fraxini | Soldier Beetle |
| Rhagonycha mandibularis | Soldier Beetle |
| Rhagonycha recta | Soldier Beetle |
| Rhamphidonta retifera | Walking Clam |
| Rhamphostomella bilaminata | Bryozoa |
| Rhamphostomella cellata | Bryozoa |
| Rhamphostomella costata | Bryozoa |
| Rhamphostomella curvirostrata | Bryozoa |
| Rhantus binotatus | Predaceous Diving Beetle |
| Rhantus frontalis | Predaceous Diving Beetle |
| Rhantus gutticollis | Predaceous Diving Beetle |
| Rhantus sericans | Predaceous Diving Beetle |
| Rhantus sinuatus | Predacious Diving Beetle |
| Rhantus wallisi | Predaceous Diving Beetle |
| Rhepoxynius abronius | Amphipod |
| Rhepoxynius barnardi | Amphipod |
| Rhepoxynius bicuspidatus | Amphipod |
| Rhepoxynius boreovariatus | Amphipod |
| Rhepoxynius daboius | Amphipod |
| Rhepoxynius fatigans | Amphipod |
| Rhepoxynius pallidus | Amphipod |
| Rhepoxynius variatus | Amphipod |
| Rhepoxynius vigitegus | Amphipod |
| Rhigognostis poulella | Moth |
| Rhinichthys osculus | Speckled Dace |
| Rhinoclama filatovae | Cuspidaria Clam |
| Rhinocyllus conicus | Beetle |
| Rhinoliparis attenuatus | Slim Snailfish |
| Rhinoncus longulus | Snout Beetle |
| Rhinoncus pericarpius | Minute Seed Weevil |
| Rhinoncus pyrrhopus | Minute Seed Weevil |
| Rhinosimus lecontei | Narrow-Waisted Bark Beetle |
| Rhinosimus pallipes | Narrow-Waisted Bark Beetle |
| Rhinosimus viridiaeneus | False Tiger Beetle |
| Rhinusa antirrhini | Weevil |
| Rhinusa linariae | Weevil |
| Rhinusa neta | Nut and Acorn Weevil |
| Rhinusa tetra | Weevil |
| Rhipicephalus sanguineus | Brown Dog Tick |
| Rhipidocotyle elongata | Parasite |
| Rhipiphorus californicus | Tumbling Flower Beetle |
| Rhipiphorus columbianus | Tumbling Flower Beetle |
| Rhipiphorus mutchleri | Tumbling Flower Beetle |
| Rhiscosomides sp. | Millipede |
| Rhithrogena jejuna | Mayfly |
| Rhithrogena virilis | Mayfly |
| Rhizaspidiotus dearnessi | True Bug |
| Rhizogeton ezoense | Hydroid |
| Rhizogeton nematophorum | Hydroid |
| Rhizogeton nudus | Hydroid |
| Rhizophagus brunneus | Root-Eating Beetle |
| Rhizophagus galbus | Rhizophagid Beetle |
| Rhizophagus grouvellei | Root-Eating Beetle |
| Rhizophagus minutus | Minute Clubbed Beetle |
| Rhizophagus minutus minutus | Beetle |
| Rhizophagus parallelocollis | Root-Eating Beetle |
| Rhizophagus pseudobrunneus | Rhizophagid Beetle |
| Rhizophagus remotus | Minute Clubbed Beetle |
| Rhizorhagium roseum | Hydroid |
| Rhodine bitorquata | Polychaete Worm |
| Rhodobium porosum | True Bug |
| Rhomphaea fictilium | Cobweb Weaver |
| Rhopalapion longirostre | Hollyhock Weevil |
| Rhopalosiphoninus hydrangeae | True Bug |
| Rhopalosiphoninus latysiphon | True Bug |
| Rhopalosiphoninus staphyleae | True Bug |
| Rhopalosiphoninus tulipaellus | True Bug |
| Rhopalosiphum enigmae | True Bug |
| Rhopalosiphum insertum | True Bug |
| Rhopalosiphum maidis | True Bug |
| Rhopalosiphum musae | True Bug |
| Rhopalosiphum nymphaeae | True Bug |
| Rhopalosiphum padi | True Bug |
| Rhopalosiphum padiformis | True Bug |
| Rhopalosiphum rufiabdominale | True Bug |
| Rhopobota naevana | Holly Tortrix |
| Rhoptobaris scolopax | Flower Weevil |
| Rhyacia clemens | Cutworm Moth |
| Rhyacionia busckana | Red Pine Tip Moth |
| Rhyacionia pasadenana | Moth |
| Rhyacionia subcervinana | Moth |
| Rhyacionia zozana | Moth |
| Rhyacophila acropedes | Caddisfly |
| Rhyacophila alberta | Caddisfly |
| Rhyacophila arnaudi | Caddisfly |
| Rhyacophila belona | Caddisfly |
| Rhyacophila betteni | Caddisfly |
| Rhyacophila bifila | Caddisfly |
| Rhyacophila brunnea | Caddisfly |
| Rhyacophila chilsia | Caddisfly |
| Rhyacophila coloradensis | Caddisfly |
| Rhyacophila ebria | Caddisfly |
| Rhyacophila fenderi | Caddisfly |
| Rhyacophila gemona | Caddisfly |
| Rhyacophila glaciera | Caddisfly |
| Rhyacophila glacieri | Caddisfly |
| Rhyacophila hyalinata | Caddisfly |
| Rhyacophila idahoensis | Caddisfly |
| Rhyacophila inculta | Caddisfly |
| Rhyacophila insularis | Caddisfly |
| Rhyacophila jenniferae | Caddisfly |
| Rhyacophila kincaidi | Caddisfly |
| Rhyacophila malkini | Caddisfly |
| Rhyacophila milnei | Caddisfly |
| Rhyacophila narvae | Caddisfly |
| Rhyacophila norcuta | Caddisfly |
| Rhyacophila oreta | Caddisfly |
| Rhyacophila pellisa | Caddisfly |
| Rhyacophila perda | Caddisfly |
| Rhyacophila perplana | Caddisfly |
| Rhyacophila rickeri | Caddisfly |
| Rhyacophila robusta | Caddisfly |
| Rhyacophila tucula | Caddisfly |
| Rhyacophila unimaculata | Caddisfly |
| Rhyacophila vaccua | Caddisfly |
| Rhyacophila vaefes | Caddisfly |
| Rhyacophila vagrita | Caddisfly |
| Rhyacophila valuma | Caddisfly |
| Rhyacophila vao | Caddisfly |
| Rhyacophila vemna | Caddisfly |
| Rhyacophila verrula | Caddisfly |
| Rhyacophila vetina | Caddisfly |
| Rhyacophila visor | Caddisfly |
| Rhyacophila vobara | Caddisfly |
| Rhyacophila vocala | Caddisfly |
| Rhyacophila vofixa | Caddisfly |
| Rhynchaenus griseus | Snout Beetle |
| Rhynchaenus mixtus | Snout Beetle |
| Rhynchaenus pallicornis | Apple Flea Weevil |
| Rhynchaenus testaceus | Snout Beetle |
| Rhynchonarella angelini | Polychaete Worm |
| Rhynchozoon bispinosum | Bryozoa |
| Rhynchozoon grandicella | Bryozoa |
| Rhynchozoon rostratum | Yellow Encrusting Bryozoan |
| Rhynchozoon tumulosum | Bryozoa |
| Rhyncolus cylindricollis | Minute Seed Weevil |
| Rhyncolus macrops | Minute Seed Weevil |
| Rhyncolus oregonensis | Minute Seed Weevil |
| Rhyncolus pallens | Minute Seed Weevil |
| Rhynohalicella halona | Amphipod |
| Rhysia fletcheri | Hydroid |
| Rhytidodus decimaquartus | True Bug |
| Rhyzobius lophanthae | Twice-stabbed Lady Beetle |
| Ribautiana foliosa | True Bug |
| Ribautiana tenerrima | True Bug |
| Ribautiana ulmi | True Bug |
| Ribautiana unca | True Bug |
| Ribautidelphax pusilla | True Bug |
| Rictaxis punctocaelatus | Striped Barrel Shell |
| Rictularia lucifugus | Parasite |
| Rifseria fuscotaeniaella | Moth |
| Rilaena triangularis | Harvestman |
| Rimicola muscarum | Kelp Clingfish |
| Ripiphorus californicus | Wedge-shaped Beetle |
| Ripiphorus columbianus | Wedge-shaped Beetle |
| Ripiphorus mutchleri | Wedge-shaped Beetle |
| Robertus borealis | Cobweb Weaver |
| Robertus fuscus | Cobweb Weaver |
| Robertus lividus | Spider |
| Robertus vigerens | Cobweb Weaver |
| Rochefortia grippi | Clam |
| Rochefortia tumida | Robust Mysella |
| Rocinela angustata | Isopod |
| Rocinela belliceps | Isopod |
| Rocinela propodialis | Pink Parasitic Isopod |
| Romualdius bifoveolatus | Broad-nosed Weevil |
| Rosenus acutus | True Bug |
| Rosenus cruciatus | True Bug |
| Rosenus decurvus | True Bug |
| Rosenus obliquus | True Bug |
| Rosenus pendulus | True Bug |
| Rosenus transarcticus | True Bug |
| Rossiana montana | Caddisfly |
| Rugathodes aurantius | Cobweb Weaver |
| Rugilus orbiculatus | Spiny-legged Rove Beetle |
| Rugilus oregonus | Rove Beetle |
| Ruscarius meanyi | Puget Sound Sculpin |
| Rushia californica | False Darkling Beetle |
| Rutidosoma decipiens | Snout Beetle |
| Rybaxis conjuncta | Ant-loving Beetle |
| Rybaxis mystica | Ant-loving Beetle |
| Rybaxis transversa | Short-winged Mold Beetle |
| Saaristoa sammamish | Sheetweb Spider |
| Sabacon occidentalis | Harvestman |
| Saccocirrus eroticus | Polychaete Worm |
| Sacium montanum | Minute Fungus Beetle |
| Saduria entomon | Isopod |
| Sagamichthys abei | Shining Tubeshoulder |
| Sagartia catalienensis | Catalina Anemone |
| Sagartiogeton californicus | Sea Anemone |
| Sagitella kowalevskii | Polychaete Worm |
| Salda anthracina | True Bug |
| Salda buenoi | True Bug |
| Salda lugubris | True Bug |
| Salda obscura | True Bug |
| Salda provancheri | True Bug |
| Saldula andrei andrei | True Bug |
| Saldula andrei azteca | True Bug |
| Saldula balli | True Bug |
| Saldula bouchervillei | True Bug |
| Saldula comatula | True Bug |
| Saldula dispersa | True Bug |
| Saldula explanata | True Bug |
| Saldula laticollis | True Bug |
| Saldula nigrita | True Bug |
| Saldula opacula | True Bug |
| Saldula opiparia | True Bug |
| Saldula pallipes dimidiata | True Bug |
| Saldula pallipes pallipes | True Bug |
| Saldula palustris | True Bug |
| Saldula saltatoria | True Bug |
| Salebius octodentatus | Silken Fungus Beetle |
| Salignus tahoensis | True Bug |
| Salmincola californiensis | Parasite |
| Salmincola edwardsii | Parasite |
| Salmincola extensus | Parasite |
| Salmincola thymalli | Parasite |
| Samytha californiensis | Polychaete Worm |
| Sanfilippodytes compertus | Predaceous Diving Beetle |
| Sanfilippodytes edwardsi | Predaceous Diving Beetle |
| Sanfilippodytes pacificus | Predaceous Diving Beetle |
| Sanfilippodytes pseudovilis | Predaceous Diving Beetle |
| Sanfilippodytes terminalis | Predaceous Diving Beetle |
| Saperda calcarata | Poplar Borer |
| Saperda horni | Twig Girdling Beetle |
| Saperda populnea moesta | Twig Girdling Beetle |
| Saperda populnea populnea | Longhorned Beetle |
| Sapintus fulvipes | pseudo |
| Saprinus discoidalis | Clown Beetle |
| Saprinus impressus | Clown Beetle |
| Saprinus lugens | Clown Beetle |
| Saprinus oregonensis | Clown Beetle |
| Sarata edwardsialis | Moth |
| Sarata nigrifasciella | Moth |
| Sarata pullatella | Moth |
| Sarconema eurycerca | Parasite |
| Sarcotaces arcticus | Parasite |
| Sarda chiliensis | Pacific Bonito |
| Sardinops sagax | Pacific Sardine |
| Sarpedon scabrosus | False Click Beetle |
| Sarsia apicula | Jellyfish |
| Sarsia cliffordi | Jellyfish |
| Sarsia eximia | Jellyfish |
| Sarsia japonica | Jellyfish |
| Sarsia princeps | Jellyfish |
| Sarsia tubulosa | Clapper Hydroid |
| Sarsia viridis | Jellyfish |
| Sassacus papenhoei | Jumping Spider |
| Sassacus vitis | Jumping Spider |
| Satilatlas marxi | Spider |
| Satyrium behrii columbia | Behr's Hairstreak |
| Satyrium fuliginosa | Sooty Hairstreak |
| Satyrium liparops fletcheri | Striped Hairstreak |
| Satyrium saepia okanaganum | Hedgerow Hairstreak |
| Satyrium titus titus | Coral Hairstreak |
| Saxicavella pacifica | Goeduck Clam |
| Saxinis saucia bisignata | Cloaked Warty Leaf Beetle |
| Saxinis saucia saucia | Cloaked Warty Leaf Beetle |
| Scabrotrophon scitulus | Spiny Trophon |
| Scalibregma inflatum | Polychaete Worm |
| Scapanus townsendii | Townsend's Mole |
| Scaphidema aeneolum | Comb-clawed Beetle |
| Scaphinotus angulatus | Rare Snail-eating Beetle |
| Scaphinotus johnsoni | Rare Snail-eating Beetle |
| Scaphinotus merkelii | Ground Beetle |
| Scaphinotus regularis | Ground Beetle |
| Scaphinotus relictus | Ground Beetle |
| Scaphinotus velutinus | Rare Snail-eating Beetle |
| Scaphisoma castaneum | Shining Fungus Beetle |
| Scaphisoma commune | Shining Fugus Beetle |
| Scaphium castanipes | Shining Fungus Beetle |
| Scaphoideus cinerosus | True Bug |
| Scaphoideus crassus | True Bug |
| Scaphoideus immistus | True Bug |
| Scaphomorphus erysimi | one |
| Scaphomorphus longinasus | one |
| Scaphomorphus poricollis | one |
| Scaphomorphus trivittatus | one |
| Scaphytopius acutus | True Bug |
| Scaphytopius diabolus | True Bug |
| Scaphytopius frontalis | True Bug |
| Scaphytopius latus | True Bug |
| Scaphytopius oregonensis | True Bug |
| Scardia anatomella | Moth |
| Scelolyperus lecontii | Cucumber Beetle |
| Scelolyperus nigrocyaneus | Leaf Beetle |
| Scelolyperus nigrovirescens | Leaf Beetle |
| Scelolyperus schwarzi | Leaf Beetle |
| Scelolyperus torquatus | Cucumber Beetle |
| Scelolyperus varipes | Cucumber Beetle |
| Schinia acutilinea | Cutworm Moth |
| Schinia biundulata | Moth |
| Schinia cumatilis | Cutworm Moth |
| Schinia honesta | Cutworm Moth |
| Schinia intermontana | Cutworm Moth |
| Schinia meadi | Mead's Flower Moth |
| Schinia suetus | Cutworm Moth |
| Schinia villosa | Cutworm Moth |
| Schinia walsinghami | Cutworm Moth |
| Schistocomus hiltoni | Polychaete Worm |
| Schistoglossa campbelli | Rove Beetle |
| Schistoglossa carexiana | Rove Beetle |
| Schistoglossa charlottae | Rove Beetle |
| Schistomeringos annulata | Polychaete Worm |
| Schistomeringos moniloceras | Polychaete Worm |
| Schistomeringos neglecta | Polychaete Worm |
| Schistomeringos pseudorubrovittata | Polychaete Worm |
| Schistomeringos rudolphii | Polychaete Worm |
| Schisturella cocula | Amphipod |
| Schizaphis graminum | True Bug |
| Schizaphis palustris | True Bug |
| Schizocosa minnesotensis | Wolf Spider |
| Schizogenius depressus | Round Sand Beetle |
| Schizogenius litigiosus | Round Sand Beetle |
| Schizolachnus curvispinosus | True Bug |
| Schizolachnus pineti | True Bug |
| Schizolachnus piniradiatae | True Bug |
| Schizomavella auriculata | Bryozoa |
| Schizomavella auriculata ochracea | Bryozoa |
| Schizoporella cornuta | Bryozoa |
| Schizoporella linearis inarmata | Bryozoa |
| Schizoporella unicornis | Orange Encrusting Bryozoan |
| Schizoretepora tessellata | Bryozoa |
| Schizotheca fissurella | Bryozoa |
| Schizotus cervicalis | Fire-Colored Beetle |
| Schreckensteinia felicella | Moth |
| Schreckensteinia festaliella | Blackberry Skeletonizer |
| Sciadiocara denticulata | Parasite |
| Sciaphilus asperatus | Pine Needle Weevil |
| Sciastes mentasta | Sheetweb Spider |
| Sciastes truncatus | Sheetweb Spider |
| Scierus annectans | Bark and Ambrosia Beetle |
| Scierus pubescens | Bark and Ambrosia Beetle |
| Scina borealis | Amphipod |
| Scina rattrayi | Amphipod |
| Scintillona bellerophon | Clam |
| Sciocoris microphthalmus | True Bug |
| Sciodrepoides fumatus terminans | Round Fungus Beetle |
| Sciodrepoides terminans | Small Carrion Beetle |
| Sciodrepoides watsoni | Small Carrion Beetle |
| Sciodrepoides watsoni hornianus | Round Fungus Beetle |
| Scionella japonica | Graft-Headed Spaghetti-Worm |
| Sciota basilaris | Moth |
| Sciota fernaldi | Moth |
| Sciota fraudifera | Moth |
| Sciota levigatella | Moth |
| Sciota yuconella | Moth |
| Scironis sima | Sheetweb Spider |
| Scironis tarsalis | Sheetweb Spider |
| Sclerobunus nondimorphicus | Harvestman |
| Scleroplax granulata | Burrow Pea Crab |
| Scolepsis foliosa | Polychaete Worm |
| Scolepsis squamata | Polychaete Worm |
| Scolex pleuronectis | Parasite |
| Scoloplos acmaceps | Polychaete Worm |
| Scoloplos armiger | Polychaete Worm |
| Scoloposcelis flavicornis | True Bug |
| Scolopostethus atlanticus | True Bug |
| Scolopostethus diffidens | True Bug |
| Scolopostethus pacificus | True Bug |
| Scolopostethus thomsoni | True Bug |
| Scolopostethus tropicus | True Bug |
| Scolops angustatus | True Bug |
| Scolytus laricis | Bark And Ambrosia Beetle |
| Scolytus monticolae | Bark And Ambrosia Beetle |
| Scolytus multistriatus | European Elm Bark Beetle |
| Scolytus opacus | Bark Beetle |
| Scolytus oregoni | Bark Beetle |
| Scolytus piceae | Cedar Bark Beetle |
| Scolytus praeceps | Bark And Ambrosia Beetle |
| Scolytus rugulosus | Shothole Borer |
| Scolytus schevyrewi | Banded Elm Bark Beetle |
| Scolytus subscaber | Bark And Ambrosia Beetle |
| Scolytus tsugae | Hemlock Engraver |
| Scolytus unispinosus | Douglas-Fir Engraver |
| Scolytus ventralis | Fir Engraver |
| Scopaeus brunnipes | Rove Beetle |
| Scoparia basalis | Many-spotted Scoparia |
| Scoparia biplagialis | Double-striped Scoparia |
| Scoparia palloralis | Moth |
| Scopelengys tristis | Pacific Blackchin |
| Scopeloberyx robustus | Longjaw Big Scale |
| Scopelogadus mizolepis | Flabby Ridgehead |
| Scopelosaurus harryi | Scaly Waryfish |
| Scopula cajanderi | Moth |
| Scopula frigidaria | Frigid Wave |
| Scopula fuscata | Moth |
| Scopula limboundata | Large Lace-border Moth |
| Scopula siccata | Moth |
| Scopula sideraria | Moth |
| Scotinella pugnata | Liocranid Sac Spider |
| Scotinella sculleni | Liocranid Sac Spider |
| Scotinotylus alpinus | Sheetweb Spider |
| Scotinotylus ambiguus | Sheetweb Spider |
| Scotinotylus bicavatus | Sheetweb Spider |
| Scotinotylus columbia | Sheetweb Spider |
| Scotinotylus eutypus | Sheetweb Spider |
| Scotinotylus gracilis | Sheetweb Spider |
| Scotinotylus majesticus | Sheetweb Spider |
| Scotinotylus pallidus | Sheetweb Spider |
| Scotinotylus patellatus | Sheetweb Spider |
| Scotinotylus protervus | Sheetweb Spider |
| Scotinotylus regalis | Sheetweb Spider |
| Scotinotylus sacer | Sheetweb Spider |
| Scotinotylus sanctus | Sheetweb Spider |
| Scotochroa basalis | False Darkling Beetle |
| Scotophaeus blackwalli | Ground Spider |
| Scrobipalpa atriplicella | Moth |
| Scrobipalpa macromaculata | Moth |
| Scrobipalpopsis arnicella | Moth |
| Scrobipalpopsis interposita | Moth |
| Scrobipalpopsis petrella | Moth |
| Scrobipalpopsis tetradymiella | Moth |
| Scrobipalpula henshawiella | Moth |
| Scrobipalpula lutescella | Moth |
| Scrobipalpula manierreorum | Moth |
| Scrobipalpula psilella | Moth |
| Scrobipalpula radiatella | Moth |
| Scruparia ambigua | Bryozoa |
| Scrupocellaria californica | Bryozoa |
| Scrupocellaria diegensis | Bryozoa |
| Scrupocellaria inarmata | Bryozoa |
| Scrupocellaria varians | Bryozoa |
| Scymnus ardelio | Spider Mite Destroyer |
| Scymnus aridus | Lady Beetle |
| Scymnus calaveras | Lady Beetle |
| Scymnus coniferarum | Lady Beetle |
| Scymnus fenderi | Lady Beetle |
| Scymnus humboldti | Lady Beetle |
| Scymnus impexus | Spider Mite Destroyer |
| Scymnus impletus | Lady Beetle |
| Scymnus iowensis | Lady Beetle |
| Scymnus lacustris | Lady Beetle |
| Scymnus marginicollis | Spider Mite Destroyer |
| Scymnus nebulosus | Lady Beetle |
| Scymnus opaculus | Lady Beetle |
| Scymnus postpictus | Lady Beetle |
| Scymnus solidus | Lady Beetle |
| Scymnus tahoensis | Lady Beetle |
| Scypholaneola vanhoeffeni | Amphipod |
| Scythris eboracensis | Moth |
| Scythris immaculatella | Moth |
| Scythris inspersella | Moth |
| Scythris noricella | Moth |
| Scythris trivinctella | Banded Scythris |
| Scytonotus bergrothi | Brown Millipede |
| Scytonotus columbianus | Millipede |
| Seba profunda | Amphipod |
| Sebastes aurora | Aurora Rockfish |
| Sebastes chlorostictus | Greenspotted Rockfish |
| Sebastes goodei | Chilipepper |
| Sebastes jordani | Shortbelly Rockfish |
| Sebastes paucispinis | Bocaccio |
| Sebastes reedi | Yellowmouth Rockfish |
| Sebastes rufus | Bank Rockfish |
| Sebastes saxicola | Stripetail Rockfish |
| Seeversiella globicollis | Rove Beetle |
| Sehirus cinctus albonotatus | True Bug |
| Selatosomus aeripennis | Glowing Click Beetle |
| Selatosomus carbo | Glowing Click Beetle |
| Selatosomus festivus | Glowing Click Beetle |
| Selatosomus funereus | Glowing Click Beetle |
| Selatosomus lateralis | Glowing Click Beetle |
| Selatosomus montanus | Glowing Click Beetle |
| Selatosomus morulus | Glowing Click Beetle |
| Selatosomus nigricans | Click Beetle |
| Selatosomus pruininus | Click Beetle |
| Selatosomus pulcher | Glowing Click Beetle |
| Selatosomus semimetallicus | Glowing Click Beetle |
| Selatosomus suckleyi | Glowing Click Beetle |
| Selenophorus planipennis | False Bombardier Beetle |
| Semanotus amethystinus | Elderberry Longhorn Beetle |
| Semanotus amplus amplus | Beetle |
| Semanotus amplus basalis | Beetle |
| Semanotus ligneus amplus | Longhorned Beetle |
| Semanotus ligneus basalis | Longhorned Beetle |
| Semanotus litigiosus | Firtree Borer |
| Semanotus terminatus | Elderberry Longhorn Beetle |
| Semidalis angusta | Dustywings |
| Semidalis pseudouncinata | Dustywings |
| Semijulistus ater | Soft-winged Flower Beetle |
| Semioscopis aurorella | Moth |
| Semioscopis inornata | Moth |
| Semioscopis megamicrella | Moth |
| Semioscopis merriccella | Moth |
| Semioscopis packardella | Packard's Concealer Moth |
| Semljicola obtusus | Sheetweb Spider |
| Senecella calanoides | Copepod |
| Sepedophilus bisignatus | Crab-like Rove Beetle |
| Sepedophilus littoreus | Crab-like Rove Beetle |
| Sergestes similis | Pacific Sergestid |
| Sergia tenuiremis | Ocean Sergestid |
| Sergiolus columbianus | Ground Spider |
| Sergiolus iviei | Spider |
| Serica anthracina | Monkey Beetle |
| Serica atracapilla | Monkey Beetle |
| Serica curvata | Scarab Beetle |
| Serica intermixta | Monkey Beetle |
| Serica sericea | Monkey Beetle |
| Sericoda bembidioides | Long-necked Ground Beetle |
| Sericoda bogemannii | Long-necked Ground Beetle |
| Sericoda obsoleta | Long-necked Ground Beetle |
| Sericoda quadripunctata | Long-necked Ground Beetle |
| Sericoderus lateralis | Minute Hooded Beetle |
| Sericophanes heidemanni | True Bug |
| Sericosema wilsonensis | Moth |
| Sericus blaisdelli | Click Beetle |
| Sericus incongruus | Brown Wireworm |
| Seriola lalandi | Yellowtail |
| Seriphus politus | Queenfish |
| Serratella teresa | Mayfly |
| Serratella tibialis | Mayfly |
| Serrivomer jesperseni | Crossthroat Sawpalate |
| Serropalpus coxalis | False Darkling Beetle |
| Serropalpus obsoletus | False Darkling Beetle |
| Serropalpus substriatus | False Darkling Beetle |
| Sesia spartani | Moth |
| Sesia tibiale | American Hornet Moth |
| Setagrotis vocalis | Moth |
| Setasomus aratus | Plowing Click Beetle |
| Setasomus nitidulus | Glowing Click Beetle |
| Setigloma japonica | Clam |
| Setophaga discolor | Prairie Warbler |
| Setvena bradleyi | Stonefly |
| Setvena tibialis | Stonefly |
| Siagonium stacesmithi | Flat Rove Beetle |
| Sialis californica | Alderfly |
| Sialis hamata | Alderfly |
| Sialis joppe | Alderfly |
| Sialis rotunda | Alderfly |
| Sialis velata | Alderfly |
| Sibirionetta formosa | Baikal Teal |
| Sideridis fuscolutea | Moth |
| Sideridis uscripta | Cutworm Moth |
| Siederia walshella | Moth |
| Sigara alternata | True Bug |
| Sigara bicoloripennis | True Bug |
| Sigara conocephala | True Bug |
| Sigara decoratella | True Bug |
| Sigara dolabra | True Bug |
| Sigara grossolineata | True Bug |
| Sigara modesta | True Bug |
| Sigara mullettensis | True Bug |
| Sigara omani | True Bug |
| Sigara penniensis | True Bug |
| Sigara solensis | True Bug |
| Sigara washingtonensis | True Bug |
| Sigmadocia porosa | Sponge |
| Sigmadocia sp. D | Sponge |
| Silaria revelstokei | False Flower Beetle |
| Silis insperata | Soldier Beetle |
| Silis lecontei | Soldier Beetle |
| Silis lutea | Soldier Beetle |
| Silis pallida | Soldier Beetle |
| Silis parallela | Soldier Beetle |
| Silis spinigera | Soldier Beetle |
| Silis striatella | Soldier Beetle |
| Silometopoides pampia | Sheetweb Spider |
| Silusa californica | Rove Beetle |
| Silusa opaca | Rove Beetle |
| Silusa vesperis | Rove Beetle |
| Silvanus bidentatus | Silvanid Flat Bark Beetle |
| Silvanus muticus | Silvanid Flat Bark Beetle |
| Silvius gigantulus | Deer Fly |
| Simitidion simile | Cobweb Weaver |
| Simobius ginampus | Centipede |
| Simplicaria potswaldi | Polychaete Worm |
| Sinea diadema | True Bug |
| Singa keyserlingi | Striped Orbweaver |
| Sipha elegans | True Bug |
| Sipha flava | True Bug |
| Sipha glyceriae | True Bug |
| Siphlonurus autumnalis | Mayfly |
| Siphlonurus columbianus | Mayfly |
| Siphlonurus occidentalis | Mayfly |
| Siphonodentalium lobatum | Tusk Shell |
| Sisamnes claviger | True Bug |
| Sisicottus crossoclavis | Sheetweb Spider |
| Sisicottus montanus | Sheetweb Spider |
| Sisicottus nesides | Sheetweb Spider |
| Sisicottus orites | Sheetweb Spider |
| Sisicottus panopeus | Sheetweb Spider |
| Sisicus apertus | Sheetweb Spider |
| Sisicus penifusifer | Sheetweb Spider |
| Sisis rotundus | Sheetweb Spider |
| Sisyra fuscatus | Spongillaflies |
| Sisyra vicaria | Spongillaflies |
| Sitobion alopecuri | True Bug |
| Sitobion avenae | True Bug |
| Sitobion caricis | True Bug |
| Sitobion fragariae | True Bug |
| Sitochroa chortalis | Dimorphic Sitochroa |
| Sitona californicus | Snout Beetle |
| Sitona cylindricollis | Sweetclover Weevil |
| Sitona hispidulus | Clover Root Curculio |
| Sitona lepidus | Snout Beetle |
| Sitona lineatus | Pea Leaf Weevil |
| Sitona lineellus | Snout Beetle |
| Sitona lupinus | Snout Beetle |
| Sitona scissifrons | Snout Beetle |
| Sitona tibialis | Snout Beetle |
| Sitona vittatus | Broad-nosed Weevil |
| Sitophilus granarius | Granary Weevil |
| Sitophilus oryzae | Rice Weevil |
| Sitotroga cerealella | Angoumois Grain Moth |
| Sitticus ammophilus | Jumping Spider |
| Sitticus dorsatus | Spider |
| Sitticus fasciger | Spider |
| Sitticus finschi | Spider |
| Sitticus floricola | Spider |
| Sitticus ranieri | Spider |
| Skistodiaptomus pallidus | Copepod |
| Skrjabinema ovis | Parasite |
| Skrjabingylus chitwoodorum | Parasite |
| Skrjabingylus nasicola | Parasite |
| Skrjabinocapillaria eubursata | Parasite |
| Skrjabinoptera phrynosoma | Parasite |
| Skwala curvata | Stonefly |
| Slaterobius insignis | True Bug |
| Slaterocoris atritibialis | True Bug |
| Slaterocoris breviatus | True Bug |
| Slaterocoris pilosus | True Bug |
| Slaterocoris robustus | True Bug |
| Slaterocoris stygicus | True Bug |
| Smicronyx cinereus | Snout Beetle |
| Smittina arctica | Bryozoa |
| Smittina landsborovi | Bryozoa |
| Smittina spathulifera | Bryozoa |
| Smynthurodes betae | True Bug |
| Sogda obtusa | Round Fungus Beetle |
| Solariella obscura | Obscure Solarelle |
| Solariella varicosa | Varicose Solarelle |
| Solemya pervernicosa | Awning Clam |
| Solen sicarius | Sickle Jacknife-Clam |
| Solenopsis molesta | Thief Ant |
| Solmissus marshalli | Jellyfish |
| Somateria fischeri | Spectacled Eider |
| Sonoma cascadia | Rove Beetle |
| Sonoma hespera | Rove Beetle |
| Sonoma olycalida | Rove Beetle |
| Sonoma squamishorum | Rove Beetle |
| Sorex arcticus | Black-Backed Shrew |
| Sorex bendirii | Pacific Water Shrew |
| Sorex merriami | Merriam's Shrew |
| Sorex monticolus | Dusky Shrew |
| Sorex palustris | Common Water Shrew |
| Sorex preblei | Preble's Shrew |
| Sorex rohweri | Olympic Shrew |
| Sorex trowbridgii | Trowbridge's Shrew |
| Sorex tundrensis | Tundra Shrew |
| Sorhagenia nimbosa | Moth |
| Sorhoanus bimaculatus | True Bug |
| Sorhoanus caricis | True Bug |
| Sorhoanus debilis | True Bug |
| Sorhoanus flavovirens | True Bug |
| Sorhoanus orientalis | True Bug |
| Sorhoanus pascuellus | True Bug |
| Sorhoanus uhleri | True Bug |
| Sorhoanus xanthoneurus | True Bug |
| Soronia guttulata | Pollen Beetle |
| Sosanopsis hesslei | Polychaete Worm |
| Soucron arenarium | Sheetweb Spider |
| Souessa spinifera | Sheetweb Spider |
| Sougambus bostoniensis | Sheetweb Spider |
| Soyedina interrupta | Stonefly |
| Soyedina producta | Stonefly |
| Spaelotis bicava | Cutworm Moth |
| Spaelotis clandestina | Cutworm Moth |
| Sparganothis senecionana | Moth |
| Sparganothis striata | Moth |
| Sparganothis sulfureana | Sparganothis Fruitworm Moth |
| Sparganothis tunicana | Moth |
| Sparganothis unifasciana | One-lined Sparganothis |
| Sparganothis violaceana | Moth |
| Sparganothis vocaridorsana | Moth |
| Spectrunculus grandis | Giant Cuskeel |
| Sperosoma biseriatum | Soft Sea Urchin |
| Sperosoma giganteum | Soft Sea Urchin |
| Speyeria atlantis hollandi | Holland's Fritillary |
| Speyeria cybele pseudocarpenteri | Great Spangled Fritillary |
| Speyeria hesperis helena | Northwestern Fritillary |
| Speyeria hydaspe minor | Minor Fritillary |
| Speyeria hydaspe rhodope | Rhodope Fritillary |
| Speyeria mormonia bischoffii | Bischoff's Fritillary |
| Speyeria zerene bremnerii | Zerene Fritillary |
| Speyeria zerene garretti | Garrett's Fritillary |
| Speyeria zerene sitka | Zerene Fritillary |
| Sphaericus gibboides | Death-watch Beetle |
| Sphaericus pinguis | Spider Beetle |
| Sphaeridium bipustulatum | Giant Water Scavenger Beetle |
| Sphaeridium lunatum | Giant Water Scavenger Beetle |
| Sphaeridium scarabaeoides | Giant Water Scavenger Beetle |
| Sphaeriestes alternatus | Narrow-Waisted Bark Beetle |
| Sphaeriestes virescens | False Tiger Beetle |
| Sphaerium nitidum | Arctic Fingernailclam |
| Sphaerium patella | Rocky Mountain Fingernailclam |
| Sphaerium striatinum | Striated Fingernailclam |
| Sphaerodoropsis minutum | Polychaete Worm |
| Sphaerodorum papillifer | Polychaete Worm |
| Sphaerospora araii | Parasite |
| Sphaerospora oncorhynchi | Parasite |
| Sphaerosyllis hystrix | Polychaete Worm |
| Sphaerosyllis pirifera | Polychaete Worm |
| Sphalma quadricollis | Dead Log Beetle |
| Spharagemon campestris | Band-Winged Grasshopper |
| Spharagemon equale | Grasshopper |
| Sphenophorus aequalis aequalis | Claycolored Billbug |
| Sphenophorus costipennis | Billbug |
| Sphenophorus mormon | Billbug |
| Sphenophorus robustus | Billbug |
| Sphenophorus sayi | Billbug |
| Sphenophorus striatipennis | Billbug |
| Sphenoptera jugoslavica | Metallic Wood-boring Beetle |
| Sphindus americanus | Cryptic Slime Mold Beetle |
| Sphinx luscitiosa | Clemens' Sphinx |
| Sphinx poecila | Northern Apple Sphinx |
| Sphragisticus nebulosus | True Bug |
| Sphyraena argentea | Pacific Barracuda |
| Spilococcus geraniae | True Bug |
| Spilococcus keiferi | True Bug |
| Spilodiscus instratus | Clown Beetle |
| Spilodiscus militaris | Clown Beetle |
| Spilodiscus sellatus | Clown Beetle |
| Spilodiscus semiruber | Clown Beetle |
| Spilosoma congrua | Agreeable Tiger Moth |
| Spilosoma pteridis | Tiger Moth |
| Spinulogammarus subcarinatus | Amphipod |
| Spio butleri | Polychaete Worm |
| Spio cirrifera | Polychaete Worm |
| Spio filicornis | Polychaete Worm |
| Spiochaetopterus costarum | Jointed Three-Section Tubeworm |
| Spiophanes berekeleyorum | Polychaete Worm |
| Spiophanes bombyx | Polychaete Worm |
| Spiophanes kroyeri | Polychaete Worm |
| Spirembolus abnormis | Sheetweb Spider |
| Spirembolus chilkatensis | Sheetweb Spider |
| Spirembolus demonologicus | Sheetweb Spider |
| Spirembolus monticolens | Sheetweb Spider |
| Spirembolus mundus | Sheetweb Spider |
| Spirembolus prominens | Sheetweb Spider |
| Spirinchus starksi | Night Smelt |
| Spirinchus thaleichthys | Longfin Smelt |
| Spirontocaris holmesi | Slender Bladed Shrimp |
| Spirontocaris sica | Dagger Bladed Shrimp |
| Spirontocaris snyderi | Snyder's Bladed Shrimp |
| Spirontocaris truncatus | Blunt Bladed Shrimp |
| Spirorbis bifurcata | Polychaete Worm |
| Splendidofilaria pectoralis | Parasite |
| Spodolepis substriataria | Moth |
| Spodoptera exigua | Cutworm Moth |
| Spodoptera praefica | Cutworm Moth |
| Spondylis upiformis | Longhorned Beetle |
| Squalonchocotyle abbreviata | Parasite |
| Stachyptilum superbum | Pennatulacean |
| Stactobiella delira | Caddisfly |
| Stactobiella palmata | Caddisfly |
| Stagetus profundus | Puffball Beetle |
| Stagnicola apicina | Abbreviate Pondsnail |
| Stagnicola arctica | Arctic Pondsnail |
| Stagnicola caperata | Wrinkled Marshsnail |
| Stamnoctenis morrisata | Moth |
| Stamnodes blackmorei | Moth |
| Stamnodes topazata | Moth |
| Stamoderes lanei | Snout Beetle |
| Staphylinus aeneocephalus | Rove Beetle |
| Staphylinus capitatus | Rove Beetle |
| Staphylinus nigrellus | Rove Beetle |
| Staphylinus pleuralis | Rove Beetle |
| Staphylinus saphyrinus | Rove Beetle |
| Staurocalyptus solidus | Sponge |
| Steatoda albomaculata | Cobweb Weaver |
| Steatoda bipunctata | Spider |
| Steatoda borealis | Cobweb Weaver |
| Steatoda hespera | Cobweb Weaver |
| Steatoda washona | Cobweb Weaver |
| Steganoderma formosum | Parasite |
| Stegobium paniceum | Drugstore Beetle |
| Stegocephalexia penelope | Amphipod |
| Stegophiura carinata | Scaly Brittle Star |
| Stegophorus stellaepolaris | Parasite |
| Stegophylla essigi | True Bug |
| Stegotricha enterikos | Parasite |
| Steiroxys c.f. strepens | Noisy Shieldback |
| Steiroxys c.f. trilineata | Three-lined Shieldback |
| Steiroxys sp. | Shieldback |
| Stellerina xyosterna | Pixie Poacher |
| Stelletta validissima | Sponge |
| Stellocaronema skrjabini | Parasite |
| Stelotrochota hartmani | Sponge |
| Stenamma diecki | Ant |
| Stenamma snellingi | Ant |
| Stenichnus californicus | Ant-Like Stone Beetle |
| Stenichnus ovipennis | Ant-Like Stone Beetle |
| Stenichnus pacificus | Ant-Like Stone Beetle |
| Stenichnus rothi | Ant-Like Stone Beetle |
| Stenobrachius leucopsarus | Northern Lanternfish |
| Stenobrachius nannochir | Garnet Lanternfish |
| Stenocorus flavolineatus | Longhorned Beetle |
| Stenocorus nubifer | Elderberry Longhorn Beetle |
| Stenocorus vestitus | Elderberry Longhorn Beetle |
| Stenocranus felti | True Bug |
| Stenocranus lautus | True Bug |
| Stenocranus pallidus | True Bug |
| Stenocranus sandersoni | True Bug |
| Stenodema pilosipes | True Bug |
| Stenodema trispinosum | True Bug |
| Stenodus leucichthys | Inconnu |
| Stenolophus fuliginosus | Seedcorn Beetle |
| Stenolophus incultus | Seedcorn Beetle |
| Stenolophus limbalis | Seedcorn Beetle |
| Stenonema terminatum | Mayfly |
| Stenopelmatus longispina | Jerusalem Cricket |
| Stenopelmus rufinasus | Weevil |
| Stenoplax fallax | Chiton |
| Stenoporpia dissonaria | Moth |
| Stenoporpia separataria | Moth |
| Stenoptilia coloradensis | Colorado Plume Moth |
| Stenoptilia columbia | British Columbia Plume Moth |
| Stenoptilia exclamationis | Exclamatory Plume Moth |
| Stenoptilia mengeli | Mengel's Plume Moth |
| Stenoptilodes antirrhina | Snapdragon Plume Moth |
| Stenostrophia amabilis | Elderberry Longhorn Beetle |
| Stenostrophia tribalteata serpentina | Elderberry Longhorn Beetle |
| Stenotothorax cribratulus | Hide Beetle |
| Stenotrachelus aeneus | False Longhorn Beetle |
| Stenus advena | Rove Beetle |
| Stenus alexanderi | Rove Beetle |
| Stenus alveolatus | Rove Beetle |
| Stenus annularis | Rove Beetle |
| Stenus assequens | Rove Beetle |
| Stenus assequens assequens | Beetle |
| Stenus austini | Rove Beetle |
| Stenus bilineatus | Rove Beetle |
| Stenus californicus | Rove Beetle |
| Stenus canaliculatus | Rove Beetle |
| Stenus cariniceps | Rove Beetle |
| Stenus columbianus | Rove Beetle |
| Stenus comma | Water Skater |
| Stenus comma comma | Beetle |
| Stenus dissentiens | Rove Beetle |
| Stenus dolosus | Rove Beetle |
| Stenus egenulus | Rove Beetle |
| Stenus egenus | Rove Beetle |
| Stenus ellipticus | Rove Beetle |
| Stenus exploratus | Rove Beetle |
| Stenus fasciculatus | Rove Beetle |
| Stenus flavicornis | Water Skater |
| Stenus fulvicornis | Rove Beetle |
| Stenus fulvicornis fulvicornis | Beetle |
| Stenus geminorum | Rove Beetle |
| Stenus hyperboreus | Rove Beetle |
| Stenus immarginatus | Rove Beetle |
| Stenus insularis | Rove Beetle |
| Stenus juno | Water Skater |
| Stenus koebelei | Rove Beetle |
| Stenus kryzhanovskii | Rove Beetle |
| Stenus laccophilus | Water Skater |
| Stenus latissimus hatchi | Rove Beetle |
| Stenus mammops | Water Skater |
| Stenus mammops mammops | Beetle |
| Stenus maritimus | Rove Beetle |
| Stenus morio | Rove Beetle |
| Stenus mundulus | Rove Beetle |
| Stenus noctivagus | Rove Beetle |
| Stenus occidentalis | Rove Beetle |
| Stenus parallelopipedus | Rove Beetle |
| Stenus pinguis | Rove Beetle |
| Stenus planatus | Rove Beetle |
| Stenus plicipennis | Rove Beetle |
| Stenus pluto | Rove Beetle |
| Stenus pollens | Rove Beetle |
| Stenus pterobrachys | Rove Beetle |
| Stenus pubescens fraternus | Rove Beetle |
| Stenus quebecensis | Rove Beetle |
| Stenus reconditus breviusculus | Rove Beetle |
| Stenus reconditus reconditus | Rove Beetle |
| Stenus retrusus | Rove Beetle |
| Stenus rossi | Rove Beetle |
| Stenus scabiosus | Rove Beetle |
| Stenus scrupeus | Rove Beetle |
| Stenus sculptilis | Water Skater |
| Stenus sectator | Rove Beetle |
| Stenus semicolon | Water Skater |
| Stenus shoshonis | Rove Beetle |
| Stenus sibiricus | Rove Beetle |
| Stenus stygicus | Water Skater |
| Stenus tahoensis | Rove Beetle |
| Stenus umbratilis | Rove Beetle |
| Stenus venustus | Rove Beetle |
| Stenus vespertinus | Rove Beetle |
| Stenus vexatus | Rove Beetle |
| Stenus vicinoides | Rove Beetle |
| Stephanauge annularis | Signet Ring Anemone |
| Stephanitis rhododendri | True Bug |
| Stephanitis takeyai | Andromeda Lacebug |
| Stephanocleonus immaculatus | one |
| Stephanocleonus parshus | one |
| Stephanostomum californicum | Parasite |
| Stephanostomum tristephanum | Parasite |
| Stephanurus dentatus | Parasite |
| Stephostethus cinnamopterus | Minute Brown Scavenger Beetle |
| Stephostethus costicollis | Minute Brown Scavenger Beetle |
| Stephostethus liratus | Minute Brown Scavenger Beetle |
| Stephostethus montanus | Minute Brown Scavenger Beetle |
| Steremnius tuberosus | Snout Beetle |
| Stereopalpus columbianus | Fire-Colored Beetle |
| Stereopalpus guttatus | Fire-Colored Beetle |
| Stereopalpus hirtus | Fire-Colored Beetle |
| Sterliadochona ephemeridarum | Parasite |
| Sternaspis fossor | Ground-Digger Dumb-Bell Worm |
| Sternoptyx pseudobscura | Highlight Hatchetfish |
| Sterrhurus exodicus | Parasite |
| Stethophyma gracile | Graceful Sedge Grasshopper |
| Stethophyma lineatum | Striped Sedge Grasshopper |
| Stethorhanis borealis | Handsome Fungus Beetle |
| Stethorus punctillum | Lady Beetle |
| Stethorus punctum picipes | Spider Mite Destroyer |
| Sthenarus cuneotinctus | True Bug |
| Sthenelais berkeleyi | Polychaete Worm |
| Sthenelais tertiglabra | Polychaete Worm |
| Sthenelais verruculosa | Polychaete Worm |
| Sthenopis argenteomaculatus | Silver-spotted Ghost Moth |
| Sthereus multituberculatus | Snout Beetle |
| Sthereus ptinoides | one |
| Stictalia arcuata | Rove Beetle |
| Stictalia brevicornis | Rove Beetle |
| Stictalia californica | Rove Beetle |
| Stictalia carlottae | Rove Beetle |
| Stictalia densicollis | Rove Beetle |
| Stictalia notata | Rove Beetle |
| Stictocephala pacifica | True Bug |
| Stictocranius mariae | Rove Beetle |
| Stictopleurus plutonius | True Bug |
| Stictopleurus punctiventris | True Bug |
| Stictopleurus viridicatus | True Bug |
| Stictostix californica | Clown Beetle |
| Stictotarsus deceptus | Beetle |
| Stictotarsus striatellus | Beetle |
| Stigmella alba | Moth |
| Stigmella anomalella | Moth |
| Stigmella betulicola | Moth |
| Stigmella ceanothi | Moth |
| Stigmella corylifoliella | Moth |
| Stigmella crataegifoliella | Moth |
| Stigmella diffasciae | Moth |
| Stigmella lapponica | Moth |
| Stigmella macrocarpae | Moth |
| Stigmella oxyacanthella | Moth |
| Stigmella populetorum | Moth |
| Stigmella rhoifoliella | Moth |
| Stigmella rosaefoliella | Moth |
| Stigmella slingerlandella | Moth |
| Stigmella stigmaciella | Moth |
| Stilbus apicalis | Shining Flower Beetle |
| Stilbus apicialis | Beetle |
| Stilipes disjuncta | Amphipod |
| Stobaera tricarinata | True Bug |
| Stomachetosella cruenta | Bryozoa |
| Stomachetosella limbata | Bryozoa |
| Stomachetosella sinuosa | Bryozoa |
| Stomatopora depressa | Bryozoa |
| Stomatopora expansa | Bryozoa |
| Stomatopora granulata | Bryozoa |
| Stomis termitiformis | Ground Beetle |
| Stomphia pacifica | Cowardly Anemone |
| Stonemyia californica | Fly |
| Stonemyia fera | Fly |
| Stragania atra | True Bug |
| Stramenaspis kelloggi | True Bug |
| Strebliospio elegans | Polychaete Worm |
| Streblosoma bairdi | Polychaete Worm |
| Streetsia challangeri | Amphipod |
| Streptocara californica | Parasite |
| Streptocara crassicauda crassicauda | Parasite |
| Streptocara formosensis | Parasite |
| Streptocara incognita | Parasite |
| Streptocara recta | Parasite |
| Stretchia plusiaeformis | Cutworm Moth |
| Stroggylocephalus mixtus | True Bug |
| Strophiona laeta | Elderberry Longhorn Beetle |
| Strophosoma melanogrammum | Snout Beetle |
| Styela truncata | Cone Tunicate |
| Stygnocoris rusticus | True Bug |
| Stygnocoris sabulosus | True Bug |
| Stygobromus quatsinensis | Amphipod |
| Stygocapitella subterranea | Polychaete Worm |
| Stygonyx courtneyi | Amphipod |
| Stylantheca porphyra | Hydrocoral |
| Stylaster norvigicus | Hydrocoral |
| Stylaster porphyra | Hydrocoral |
| Stylochus californiensis | California Flatworm |
| Styloctetor stativus | Sheetweb Spider |
| Stylopauropus californianus | Pauropod |
| Stylopauropus canadensis | Pauropod |
| Stylopauropus gladiator | Pauropod |
| Stylops advarians | Twisted-Wing Parasite |
| Stylops leechi | Twisted-Wing Parasite |
| Stylops shannoni | Twisted-Wing Parasite |
| Stylopus arndti | Sponge |
| Stylostomum sanjuania | Compound Tunicate Flatworm |
| Subhaida ingrata | Ocellate Rove Beetle |
| Succinea oregonensis | Oregon Ambersnail |
| Succinea rusticana | Rustic Ambersnail |
| Sula granti | Nazca Booby |
| Sula leucogaster | Brown Booby |
| Sula sula | Red-footed Booby |
| Sulcacis curtula | Minute Tree-Fungus Beetle |
| Sulcacis curtulus | Minute Tree-fungus Beetle |
| Sunira bicolorago | Bicolored Sallow Moth |
| Sunius peregrinus | Rove Beetle |
| Sunius quadripennis | Rove Beetle |
| Sunius rugithorax | Rove Beetle |
| Sus scrofa | Feral Pig |
| Sutyna privata | Moth |
| Suwallia autumna | Stonefly |
| Suwallia dubia | Stonefly |
| Suwallia forcipata | Stonefly |
| Suwallia lineosa | Stonefly |
| Suwallia pallidula | Stonefly |
| Swammerdamia beirnei | Moth |
| Swammerdamia caesiella | Moth |
| Swammerdamia pyrella | Rufous-tipped Swammerdamia |
| Sweltsa albertensis | Stonefly |
| Sweltsa borealis | Stonefly |
| Sweltsa coloradensis | Stonefly |
| Sweltsa exquisita | Stonefly |
| Sweltsa fidelis | Stonefly |
| Sweltsa occidens | Stonefly |
| Sweltsa oregonensis | Stonefly |
| Sweltsa pacifica | Stonefly |
| Sweltsa revelstoka | Stonefly |
| Swiftia pacifica | Coral |
| Swiftia simplex | Coral |
| Syarinus obscurus | Pseudoscorpion |
| Sycon compactum | Sponge |
| Sycon mundulum | Sponge |
| Sycon protectum | Sponge |
| Syllides japonica | Polychaete Worm |
| Syllides longocirrata | Polychaete Worm |
| Syllis elongata | Polychaete Worm |
| Syllis spongiphila | Polychaete Worm |
| Sylvanelater furtivus | Glowing Click Beetle |
| Sylvanelater mendax | Glowing Click Beetle |
| Symbolophorus californiensis | Bigfin Lanternfish |
| Symmigma minimum | Sheetweb Spider |
| Sympherobius angustus | Brown Lacewing |
| Sympherobius californicus | Brown Lacewing |
| Sympherobius killingtoni | Brown Lacewing |
| Sympherobius perparvus | Brown Lacewing |
| Symphurus atricaudus | California Tonguefish |
| Sympistis acheron | Moth |
| Sympistis albifasciata | Moth |
| Sympistis amun | Moth |
| Sympistis anweileri | Moth |
| Sympistis augustus | Moth |
| Sympistis badistriga | Brown-lined Sallow Moth |
| Sympistis barnesii | Moth |
| Sympistis californiae | Moth |
| Sympistis cherti | Moth |
| Sympistis chionanthi | Fringe-Tree Sallow Moth |
| Sympistis chons | Moth |
| Sympistis cibalis | Moth |
| Sympistis cocytus | Moth |
| Sympistis columbia | Moth |
| Sympistis coprocolor | Moth |
| Sympistis dentata | Toothed Apharetra Moth |
| Sympistis dinalda | Moth |
| Sympistis extremis | Moth |
| Sympistis fifia | Moth |
| Sympistis figurata | Moth |
| Sympistis funebris | Cutworm Moth |
| Sympistis glennyi | Moth |
| Sympistis greyi | Moth |
| Sympistis heliophila | Moth |
| Sympistis incubus | Moth |
| Sympistis lacticollis | Moth |
| Sympistis levis | Moth |
| Sympistis meadiana | Moth |
| Sympistis occata | Moth |
| Sympistis pallidior | Moth |
| Sympistis parvanigra | Moth |
| Sympistis poliochroa | Moth |
| Sympistis pudorata | Moth |
| Sympistis riparia | Moth |
| Sympistis sandaraca | Moth |
| Sympistis tenuifascia | Moth |
| Sympistis umbrifascia | Moth |
| Sympistis wilsoni | Cutworm Moth |
| Sympistis youngi | Moth |
| Sympleustes corginerus | Amphipod |
| Symydobius intermedius | True Bug |
| Synageles canadensis | Jumping Spider |
| Synageles leechi | Jumping Spider |
| Synageles occidentalis | Jumping Spider |
| Synanthedon bolteri | Northern Willow Clearwing Moth |
| Synanthedon canadensis | Moth |
| Synanthedon chrysidipennis | Moth |
| Synanthedon culiciformis | Large Red-belted Clearwing Moth |
| Synanthedon exitiosa | Peachtree Borer |
| Synanthedon helenis | Moth |
| Synanthedon mellinipennis | Ceanothus Borer |
| Synanthedon resplendens | Sycamore Borer |
| Synanthedon saxifragae | Moth |
| Synanthedon scitula | Dogwood Borer |
| Synanthedon tipuliformis | Currant Borer |
| Synaphaeta guexi | Flat-faced Longhorn |
| Synaptomys borealis | Northern Bog Lemming |
| Syndemis afflictana | Gray Leafroller |
| Synecdoche constellata | True Bug |
| Synecdoche nemoralis | True Bug |
| Syneta pilosa | Purple Loosestrife Beetle |
| Syneta simplex | Leaf Beetle |
| Syneta simplex subalpina | Leaf Beetle |
| Syngamus trachea | Parasite |
| Syngrapha abstrusa | Cutworm Moth |
| Syngrapha alticola | Cutworm Moth |
| Syngrapha angulidens | Cutworm Moth |
| Syngrapha borea | Cutworm Moth |
| Syngrapha diasema | Cutworm Moth |
| Syngrapha ignea | Cutworm Moth |
| Syngrapha interrogationis | Cutworm Moth |
| Syngrapha microgamma | Cutworm Moth |
| Syngrapha parilis | Cutworm Moth |
| Syngrapha selecta | Moth |
| Syngrapha surena | Moth |
| Synidotea angulata | Isopod |
| Synidotea consolidata | Smooth Synidotea |
| Synidotea cornuta | Coralline Isopod |
| Synidotea minuta | Isopod |
| Synidotea nebulosa | Isopod |
| Synidotea nodulosa | Isopod |
| Synidotea pettiboneae | Pettibone's Synidotea |
| Synidotea ritteri | Ritter's Synidotea |
| Synodus lucioceps | Smallscale Lizardfish |
| Synthliboramphus scrippsi | Scripp's Murrelet |
| Syntomium confragosum | Rove Beetle |
| Syntomium grahami | Rove Beetle |
| Syntomium keenianum | Rove Beetle |
| Syntomium malkini | Rove Beetle |
| Syntomus americanus | Flat-horned Ground Beetle |
| Synuchus impunctatus | Western False-form Beetle |
| Synurella johanseni | Amphipod |
| Syrrhoe crenulata | Amphipod |
| Syrrhoe longifrons | Amphipod |
| Systellaspis braueri | Shrimp |
| Systellaspis cristata | Krygier Spinytail |
| Tabanus aegrotus | Horse Fly |
| Tabanus fratellus | Horse Fly |
| Tabanus kesseli | Horse Fly |
| Tabanus laticeps | Horse Fly |
| Tabanus marginalis | Horse Fly |
| Tabanus reinwardti | Horse Fly |
| Tabanus sequax | Horse Fly |
| Tabanus similis | Horse Fly |
| Tabanus stonei | Horse Fly |
| Tachinus angustatus | Rove Beetle |
| Tachinus beckeri | Rove Beetle |
| Tachinus contortus | Rove Beetle |
| Tachinus crotchii | Rove Beetle |
| Tachinus debilis | Rove Beetle |
| Tachinus dilatatus | Rove Beetle |
| Tachinus edwardi | Rove Beetle |
| Tachinus elongatus | Crab-like Rove Beetle |
| Tachinus frigidus | Crab-like Rove Beetle |
| Tachinus instabilis | Rove Beetle |
| Tachinus lanei | Rove Beetle |
| Tachinus maculicollis | Crab-like Rove Beetle |
| Tachinus nigricornis | Rove Beetle |
| Tachinus quebecensis | Crab-like Rove Beetle |
| Tachinus rainieri | Rove Beetle |
| Tachinus rufipes | Rove Beetle |
| Tachinus smetanai | Rove Beetle |
| Tachinus stacesmithi | Rove Beetle |
| Tachinus subterraneus | Crab-like Rove Beetle |
| Tachinus tachyporoides | Rove Beetle |
| Tachinus thruppi | Rove Beetle |
| Tachyerges ephippiatus | Nut and Acorn Weevil |
| Tachyerges niger | Nut and Acorn Weevil |
| Tachyerges salicis | Nut and Acorn Weevil |
| Tachygyna coosi | Sheetweb Spider |
| Tachygyna exilis | Sheetweb Spider |
| Tachygyna haydeni | Sheetweb Spider |
| Tachygyna pallida | Sheetweb Spider |
| Tachygyna proba | Sheetweb Spider |
| Tachygyna ursina | Sheetweb Spider |
| Tachygyna vancouverana | Sheetweb Spider |
| Tachyporus abdominalis | Crab-like Rove Beetle |
| Tachyporus borealis | Rove Beetle |
| Tachyporus californicus | Rove Beetle |
| Tachyporus canadensis | Crab-like Rove Beetle |
| Tachyporus dimorphus | Rove Beetle |
| Tachyporus dispar | Crab-like Rove Beetle |
| Tachyporus flavipennis | Rove Beetle |
| Tachyporus inornatus | Rove Beetle |
| Tachyporus lecontei | Crab-like Rove Beetle |
| Tachyporus maculicollis | Crab-like Rove Beetle |
| Tachyporus mexicanus | Rove Beetle |
| Tachyporus nimbicola | Rove Beetle |
| Tachyporus nitidulus | Crab-like Rove Beetle |
| Tachyporus ornatus | Rove Beetle |
| Tachyporus pacificus | Rove Beetle |
| Tachyporus rulomus | Rove Beetle |
| Tachyporus stacesmithi | Rove Beetle |
| Tachyrhynchus reticulatus | Turret Shell |
| Tachys edax | Beetle |
| Tachys vittiger | Round Sand Beetle |
| Tachyta angulata | Round Sand Beetle |
| Tachyta falli | Round Sand Beetle |
| Tachyta inornata | Round Sand Beetle |
| Tachyta kirbyi | Beetle |
| Tachyta nana inornata | Ground Beetle |
| Tachyta nana kirbyi | Ground Beetle |
| Tachyusa americanoides | Rove Beetle |
| Tachyusa cavicollis | Rove Beetle |
| Tachyusa obsoleta | Rove Beetle |
| Tactostoma macropus | Longfin Dragonfish |
| Taenia hydatigena | Parasite |
| Taenia krabbei | Parasite |
| Taenia mustelae | Parasite |
| Taenia omissa | Parasite |
| Taenia taeniaeformis | Parasite |
| Taenia twitchelli | Parasite |
| Taenionema kincaidi | Stonefly |
| Taenionema pacifica | Stonefly |
| Taenionema pallida | Stonefly |
| Takecallis arundicolens | True Bug |
| Takecallis arundinariae | True Bug |
| Talavera minuta | Jumping Spider |
| Talismania bifurcata | Threadfin Slickhead |
| Talitroides alluaudi | Amphipod |
| Tamalia coweni | True Bug |
| Tanais loricatus | Isopod |
| Tanaops ignitus | Soft-Winged Flower Beetle |
| Tanaops malkini | Soft-Winged Flower Beetle |
| Taniva albolineana | Spruce Needleminer |
| Tanyrhinus singularis | Ocellate Rove Beetle |
| Tanysphyrus ater | Marsh Weevil |
| Tanysphyrus lemnae | Snout Beetle |
| Taonius pavo | Cranch Squid |
| Taphroscydmus californicus | Rove Beetle |
| Tapinesthis inermis | Dwarf Six-Eyed Spider |
| Tapinocyba dietrichi | Sheetweb Spider |
| Tapinocyba minuta | Sheetweb Spider |
| Tapinocyba prima | Sheetweb Spider |
| Tarache areli | Moth |
| Tarache augustipennis | Narrow-winged Midget Moth |
| Tarache major | Moth |
| Taractes asper | Rough Pomfret |
| Taranetzella lyoderma | Ghostly Eelpout |
| Tarletonbeania crenularis | Blue Lanternfish |
| Tarletonbeania taylori | Northern Blue Lanternfish |
| Tarphiota debilicollis | Rove Beetle |
| Tarphiota fucicola | Rove Beetle |
| Tarphiota geniculata | Rove Beetle |
| Tarphiota insolita | Rove Beetle |
| Tarphiota seditiosa | Rove Beetle |
| Tarsostenus univittatus | Checkered Beetle |
| Tasgius ater | Large Rove Beetle |
| Tasgius winkleri | Large Rove Beetle |
| Tebenna balsamorrhizella | Moth |
| Tebenna onustana | Moth |
| Tebenna piperella | Moth |
| Tectura fenestrata | Chocolate Limpet |
| Tectura paleacea | Surfgrass Limpet |
| Tedania fragilis | Sponge |
| Tedania gurjanovae | Sponge |
| Tegella aquilirostris | Bryozoa |
| Tegella arctica | Bryozoa |
| Tegella armifera | Bryozoa |
| Tegella circumclathrata | Bryozoa |
| Tegella robertsonae | Bryozoa |
| Tegella unicornis | Bryozoa |
| Tegenaria domestica | Barn Funnel Weaver |
| Telamona barbata | True Bug |
| Telamona pyramidata | True Bug |
| Telamona tremulata | True Bug |
| Teleonemia nigrina | True Bug |
| Teleorhinus brindleyi | True Bug |
| Telethusia ovalis | Moth |
| Tellina bodegensis | Bodega Tellin |
| Telmatophilus americanus | Silken Fungus Beetle |
| Telolecithus pugetensis | Parasite |
| Teloleuca bifasciata | True Bug |
| Teloleuca pellucens | True Bug |
| Telphusa longifasciella | Moth |
| Telphusa sedulitella | Moth |
| Temnoscheila chlorodia | Bark-gnawing Beetle |
| Temnostoma vespiforme | Flower Fly |
| Temnothorax nevadensis | Ant |
| Temnothorax nitens | Ant |
| Temnothorax rugatulus | Ant |
| Tenebrio obscurus | Dark Mealworm |
| Tenebroides corticalis | Bark-gnawing Beetle |
| Tenebroides crassicornis | Bark-gnawing Beetle |
| Tenebroides mauritanicus | Cadelle |
| Tenebroides occidentalis | Bark-gnawing Beetle |
| Tenebroides sinuatus | Bark-Gnawing Beetle |
| Tennesseellum formica | Sheetweb Spider |
| Tenuiphantes tenuis | Spider |
| Tenuiphantes zebra | Spider |
| Tenuiphantes zelatus | Spider |
| Tenuiphantes zibus | Spider |
| Tepa rugulosa | True Bug |
| Teratocoris caricis | True Bug |
| Teratocoris discolor | True Bug |
| Teratocoris paludum | True Bug |
| Teratocoris saundersi | True Bug |
| Terebella ehrenbergi | Polychaete Worm |
| Terebellides stroemi | Polychaete Worm |
| Terebratulina crossei | Brachiopod |
| Teredo navalis | Clam |
| Teretrius montanus | Clown Beetle |
| Terminoflustra membranaceo-truncata | Bryozoa |
| Tesagrotis atrifrons | Cutworm Moth |
| Tesagrotis corrodera | Cutworm Moth |
| Tesagrotis piscipellis | Cutworm Moth |
| Tesarius caelatus | Hide Beetle |
| Tesarius oregonensis | Hide Beetle |
| Testacella haliotidea | Earshell Slug |
| Tetanolita palligera | Cutworm Moth |
| Tetartopeus captiosus | Rove Beetle |
| Tetartopeus niger | Spiny-legged Rove Beetle |
| Tetracis crocallata | Yellow Slant-line Moth |
| Tetracis pallidata | Moth |
| Tetragnatha caudata | Longjawed Orbweaver |
| Tetragnatha dearmata | Longjawed Orbweaver |
| Tetragnatha elongata | Thickjawed Orbweaver |
| Tetragnatha extensa | Thickjawed Orbweaver |
| Tetragnatha shoshone | Thickjawed Orbweaver |
| Tetragonurus cuvieri | Smalleye Squaretail |
| Tetrameres crami | Parasite |
| Tetraneura ulmi | True Bug |
| Tetraonchus alaskensis | Parasite |
| Tetraonchus borealis | Parasite |
| Tetraonchus variabilis | Parasite |
| Tetraphleps abdulghani | True Bug |
| Tetraphleps canadensis | True Bug |
| Tetraphleps feratis | True Bug |
| Tetraphleps latipennis | True Bug |
| Tetraphleps pilosipes | True Bug |
| Tetrastemma bicolor | Ribbon Worm |
| Tetrastemma candidum | Ribbon Worm |
| Tetrastemma phyllospadicola | Ribbon Worm |
| Tetratoma concolor | Polypore Fungus Beetle |
| Tetrix brunneri | Pygmy Grasshopper |
| Tetrix ornata | Ornate Pygmy Grasshopper |
| Tetrix ornata occidua | Ornate Pygmy Grasshopper |
| Tetrix ornata ornata | Ornate Pygmy Grasshopper |
| Tetrix subulata | Slender Groundhopper |
| Tetropium abietis | Elderberry Longhorn Beetle |
| Tetropium cinnamopterum | Longhorned Beetle |
| Tetropium parvulum | Elderberry Longhorn Beetle |
| Tetropium velutinum | Elderberry Longhorn Beetle |
| Teuchestes fossor | Hide Beetle |
| Texananus arctostaphylae | True Bug |
| Texananus cumulatus | True Bug |
| Texananus decorus | True Bug |
| Texananus dolus | True Bug |
| Texananus extremus | True Bug |
| Texananus latipex | True Bug |
| Texananus oregonus | True Bug |
| Texananus proximus | True Bug |
| Texananus superbus | True Bug |
| Thalasselephas testaceus | one |
| Thalassenchelys coheni | Transparent Eel |
| Thaleichthys pacificus | Eulachon |
| Thaleria leechi | Sheetweb Spider |
| Thalycra concolor | Sap-Feeding Beetle |
| Thalycra dentata | Sap-Feeding Beetle |
| Thalycra keltoni | Sap-Feeding Beetle |
| Thalycra leechi | Sap-Feeding Beetle |
| Thalycra mixta | Sap-Feeding Beetle |
| Thalycra monticola | Sap-Feeding Beetle |
| Thalycra murrayi | Sap-Feeding Beetle |
| Thalycra parsonsi | Sap-Feeding Beetle |
| Thalycra sinuata | Sap-Feeding Beetle |
| Thalysias laevigata | Sponge |
| Thamnotettix confinis | True Bug |
| Thanasimus dubius | Checkeredbeetle |
| Thanasimus undatulus | Checkered Beetle |
| Thanasimus undatulus nubilus | Beetle |
| Thanasimus undatulus undatulus | Beetle |
| Thanatophilus coloradensis | Oxelytrum - FALSE US RECORD |
| Thanatophilus lapponicus | Carrion Beetle |
| Thanatophilus sagax | Oxelytrum - FALSE US RECORD |
| Thanatus altimontis | Running Crab Spider |
| Thanatus arcticus | Running Crab Spider |
| Thanatus bungei | Running Crab Spider |
| Thanatus formicinus | Running Crab Spider |
| Thanatus striatus | Running Crab Spider |
| Thanatus vulgaris | Running Crab Spider |
| Thatuna gilletti | True Bug |
| Thaumatopsis repandus | Moth |
| Thecabius affinis | True Bug |
| Thecabius gravicornis | True Bug |
| Thecabius populimonilis | True Bug |
| Thecesternus affinis | Pine Needle Weevil |
| Thelaxes californica | True Bug |
| Thelepus cincinnatus | Polychaete Worm |
| Thelepus crispus | Curly-Head Spaghetti-Worm |
| Thelepus hamatus | Polychaete Worm |
| Thelepus japonicus | Polychaete Worm |
| Thelepus setosus | Polychaete Worm |
| Themisto pacifica | Amphipod |
| Thera otisi | Moth |
| Theridion agrifoliae | Cobweb Weaver |
| Theridion californicum | Cobweb Weaver |
| Theridion differens | Cobweb Weaver |
| Theridion frondeum | Cobweb Weaver |
| Theridion hemerobium | Cobweb Weaver |
| Theridion lawrencei | Cobweb Weaver |
| Theridion leechi | Cobweb Weaver |
| Theridion melanurum | Cobweb Weaver |
| Theridion murarium | Cobweb Weaver |
| Theridion neomexicanum | Cobweb Weaver |
| Theridion petraeum | Cobweb Weaver |
| Theridion pictum | Cobweb Weaver |
| Theridion rabuni | Cobweb Weaver |
| Theridion saanichum | Cobweb Weaver |
| Theridion varians | Cobweb Weaver |
| Theridula emertoni | Cobweb Weaver |
| Therioaphis ononidis | True Bug |
| Therioaphis riehmi | True Bug |
| Therioaphis trifolii | True Bug |
| Theromyzon bifarium | Freshwater Leech |
| Theromyzon rude | Freshwater Leech |
| Theromyzon tessulatum | Freshwater Leech |
| Thes bergrothi | Ridgewinged Fungus Beetle |
| Thicanus mimus | Antlike Flower Beetle |
| Thinobius frizzelli | Rove Beetle |
| Thinodromus diffusus | Rove Beetle |
| Thinusa fletcheri | Rove Beetle |
| Thinusa maritima | Rove Beetle |
| Tholera americana | Cutworm Moth |
| Thompsonia reinhardi | Tubeworm Hermit Parasitic Barnacle |
| Thorlaksonius borealis | Amphipod |
| Thorlaksonius brevirostris | Amphipod |
| Thorlaksonius carinatus | Amphipod |
| Thorlaksonius grandirostris | Amphipod |
| Thorlaksonius subcarinatus | Amphipod |
| Thorybes pylades pylades | Northern Cloudywing |
| Thracia challisiana | Thracia Clam |
| Thracia condoni | Thracia Clam |
| Thracia devexa | Thracia Clam |
| Thracia myopsis | Arctic Thracia |
| Thraylia voxcana | Moth |
| Thricolema anomala | Purple Loosestrife Beetle |
| Thripsaphis cyperi | True Bug |
| Thripsaphis verrucosa | True Bug |
| Thunnus orientalis | Pacific Bluefin Tuna |
| Thyasira flexuosa | Flexuose Cleftclam |
| Thyasira orecta | Clam |
| Thymalus marginicollis | linae - MOVE THE REF ENTRY & DELETE PAGE |
| Thymoites camano | Cobweb Weaver |
| Thymoites minnesota | Cobweb Weaver |
| Thymoites oleatus | Spider |
| Thyone benti | Bent Sea Cucumber |
| Thyonidium kurilensis | Kurile Sea Cucumber |
| Thyralia bunteana | Moth |
| Thysanosoma actinioides | Parasite |
| Tia enervana | Moth |
| Tiaja arenaria | True Bug |
| Tibellus asiaticus | Slender Crab Spider |
| Tibellus chamberlini | Slender Crab Spider |
| Tibellus maritimus | Slender Crab Spider |
| Tiburonia granrojo | Big Red |
| Timarcha cerdo | Leaf Beetle |
| Timarcha intricata | Scriptured Leaf Beetle |
| Timpanoga hecuba | Mayfly |
| Tinagma giganteum | Moth |
| Tinagma obscurofasciella | Moth |
| Tindaria kennerlyi | Clam |
| Tinea columbariella | Moth |
| Tinea irrepta | Moth |
| Tinea pellionella | Casemaking Clothes Moth |
| Tineola bisselliella | Webbing Clothes Moth |
| Tinocallis platani | True Bug |
| Tinocallis ulmifolii | True Bug |
| Tinotus acerbus | Rove Beetle |
| Tinotus morion | Rove Beetle |
| Tiron biocellata | Amphipod |
| Tiso aestivus | Sheetweb Spider |
| Tiso vagans | Sheetweb Spider |
| Titanebo parabolis | Running Crab Spider |
| Titanoeca nigrella | Titanoecid Spider |
| Titanoeca nivalis | Titanoecid Spider |
| Tmarus angulatus | Crab Spider |
| Tmeticus ornatus | Sheetweb Spider |
| Todarodes pacificus | Japanese Flying Squid |
| Togwoteeus biceps | Harvestman |
| Tollius curtulus | True Bug |
| Tollius setosus | True Bug |
| Tomopteris cavallii | Polychaete Worm |
| Tomopteris renata | Polychaete Worm |
| Tomopteris septentrionalis | Polychaete Worm |
| Tomoxia borealis | Tumbling Flower Beetle |
| Topsentia disparilis | Sponge |
| Torpedo californica | Pacific Electric Ray |
| Tournotaris bimaculata | Waterhyacinth Weevil |
| Toutellus oregonensis | Earthworm |
| Toxascaris leonina | Parasite |
| Toxoleptura vexatrix | Long-horned Beetle |
| Toxoptera aurantii | True Bug |
| Toxostoma curvirostre | Curve-billed Thrasher |
| Trachipterus altivelis | King-Of-The-Salmon |
| Trachurus symmetricus | Jack Mackerel |
| Trachykele blondeli blondeli | Metallic Wood-boring Beetle |
| Trachykele opulenta | Metallic Wood-boring Beetle |
| Trachypachus gibbsii | False Ground Beetle |
| Trachypachus holmbergi | False Ground Beetle |
| Trachypachus inermis | False Ground Beetle |
| Trachyphloeus bifoveolatus | Snout Beetle |
| Trachypleustes trevori | Amphipod |
| Trachypleustes vancouverensis | Amphipod |
| Trachysida mutabilis | Elderberry Longhorn Beetle |
| Trama rara | True Bug |
| Trapezonotus arenarius | True Bug |
| Traskorchestia georgiana | Amphipod |
| Travisia brevis | Polychaete Worm |
| Travisia forbesii | Polychaete Worm |
| Travisia japonica | Polychaete Worm |
| Travisia pupa | Pupa Utility-Worm |
| Travisiopsis lobifera | Polychaete Worm |
| Trechus apicalis | Round Sand Beetle |
| Trechus chalybeus | Round Sand Beetle |
| Trechus oregonensis | Ground Beetle |
| Trechus ovipennis | Round Sand Beetle |
| Trechus tenuiscapus | Ground Beetle |
| Trematoecia porosa | Bryozoa |
| Treptoplatypus wilsoni | Pinhole Borer |
| Triaenodes flavescens | Triaenode Caddisfly |
| Triaenodes injustus | Caddisfly |
| Triaenodes marginatus | Triaenode Caddisfly |
| Triaenodes nox | Caddisfly |
| Trialeurodes merlini | True Bug |
| Trialeurodes vaporariorum | True Bug |
| Triarthron lecontei | Small Carrion Beetle |
| Triaxomera parasitella | Moth |
| Tribolium audax | American Black Flour Beetle |
| Tribolium brevicorne | Darkling Beetle |
| Tribolium castaneum | Red Flour Beetle |
| Tribolium confusum | Confused Flour Beetle |
| Tribolium destructor | Darkling Beetle |
| Tricellaria erecta | Bryozoa |
| Tricellaria gracilis | Bryozoa |
| Tricellaria occidentalis | Bryozoa |
| Tricellaria occidentalis catalinensis | Bryozoa |
| Tricellaria pribilofi | Bryozoa |
| Tricellaria ternata | Bryozoa |
| Trichalophus alternatus | Broad-nosed Weevil |
| Trichalophus brunneus | Broad-nosed Weevil |
| Trichalophus didymus | Broad-nosed Weevil |
| Trichalophus granicollis | Broad-nosed Weevil |
| Trichapion centrale | Straight-snouted Weevil |
| Trichapion proclive | Straight-snouted Weevil |
| Trichiusa columbica | Rove Beetle |
| Trichobranchus glacialis | Polychaete Worm |
| Trichocellus cognatus | Ground Beetle |
| Trichocellus mannerheimii | Ground Beetle |
| Trichocerapoda oblita | Cutworm Moth |
| Trichocnemis spiculatus spiculatus | Beetle |
| Trichocorixa verticalis californica | True Bug |
| Trichodesma cristata | Death-watch Beetle |
| Tricholathys rothi | Meshweaver |
| Tricholathys spiralis | Meshweaver |
| Tricholochmaea cavicollis | Cherry Leaf Beetle |
| Tricholochmaea decora carbo | Pacific Willow Leaf Beetle |
| Tricholochmaea decora decora | Beetle |
| Tricholochmaea punctipennis | Purple Loosestrife Beetle |
| Tricholochmaea punctipennis pallida | Leaf Beetle |
| Tricholochmaea punctipennis punctipennis | Leaf Beetle |
| Tricholochmaea spiraeophila | Leaf Beetle |
| Trichopepla aurora | True Bug |
| Trichopepla dubia | True Bug |
| Trichophaga tapetzella | Carpet Moth |
| Trichophya pilicornis | Crab-like Rove Beetle |
| Trichoptilus pygmaeus | Pygmy Plume Moth |
| Trichordestra dodii | Cutworm Moth |
| Trichordestra legitima | Striped Garden Caterpillar Moth |
| Trichosirocalus horridus | Weevil |
| Trichotropis borealis | Boreal Hairysnail |
| Trichuris schumakovitschi | Parasite |
| Tricorythrodes minutus | Mayfly |
| Tricrania murrayi | Blister Beetle |
| Tricrania stansburii | Stansbury's Blister Beetle |
| Tricrania stansburyi | Blister Beetle |
| Tridentaforma fuscoleuca | Moth |
| Tridiscus oetvoesi | True Bug |
| Trigonarthris minnesotana | Elderberry Longhorn Beetle |
| Trigonodemus fasciatus | Rove Beetle |
| Trigonogenius globulus | Spider Beetle |
| Trigonorhinus annulatus | Fungus Weevil |
| Trigonorhinus sticticus | Fungus weevil |
| Trigonoscuta pilosa iridescens | Snout Beetle |
| Trigonotylus americanus | True Bug |
| Trigonotylus antennatus | True Bug |
| Trigonotylus brooksi | True Bug |
| Trigonotylus caelestialium | True Bug |
| Trigonotylus longipes | True Bug |
| Trigonotylus viridis | True Bug |
| Trigonurus dilaticollis | Rove Beetle |
| Trimerotropis gracilis | Thomas' Slender Grasshopper |
| Trimerotropis verruculata verruculata | Dark Grasshopper |
| Tringa brevipes | Gray-tailed Tattler |
| Tringa erythropus | Spotted Redshank |
| Tringa glareola | Wood Sandpiper |
| Trionymus americanus | True Bug |
| Trionymus caricis | True Bug |
| Trionymus utahensis | True Bug |
| Triopha maculata | Spotted Triopha |
| Trioza albifrons | True Bug |
| Trioza frontinalis | True Bug |
| Trioza incerta | True Bug |
| Trioza inversa | True Bug |
| Trioza longicornis | True Bug |
| Trioza occidentalis | True Bug |
| Trioza quadripunctata | True Bug |
| Trioza salicivora | True Bug |
| Trioza shepherdiae | True Bug |
| Trioza varians | True Bug |
| Triphyllia elongatus | Polypore Fungus Beetle |
| Triplax antica | Pleasing Fungus Beetle |
| Triplax californica antica | Beetle |
| Triplax californica californica | Beetle |
| Triplax cuneata | Pleasing Fungus Beetle |
| Trirhabda attenuata | Purple Loosestrife Beetle |
| Trirhabda borealis | Purple Loosestrife Beetle |
| Trirhabda lewisii | Purple Loosestrife Beetle |
| Trirhabda pilosa pilosa | Purple Loosestrife Beetle |
| Trirhabda sericotrachyla | Purple Loosestrife Beetle |
| Tritella laevis | Amphipod |
| Tritella pilimana | Amphipod |
| Triticella pedicellata | Bryozoa |
| Trixagus carinicollis | Small False Click Beetle |
| Trixagus chevrolati | Small False Click Beetle |
| Trixagus mendax | Small False Click Beetle |
| Trixagus sericeus | Small False Click Beetle |
| Triznaka signata | Stonefly |
| Trochochaeta multisetosa | Polychaete Worm |
| Trochopus marginata | Parasite |
| Trochopus trituba | Parasite |
| Trochus atropurpureus | Purple Clanculus |
| Troglodytes hiemalis | Winter Wren |
| Trogloneta paradoxa | Dwarf Cobweb Seaver |
| Trogoderma inclusum | Carpet Beetle |
| Trogoderma simplex | Carpet Beetle |
| Trogoderma sinistrum | Carpet Beetle |
| Trogoderma sternale sternale | Carpet Beetle |
| Tropideres fasciatus | Fungus Weevil |
| Tropidosteptes pacificus | True Bug |
| Tropisternus affinis | Water Scavenger Beetle |
| Tropisternus columbianus | Giant Water Scavenger Beetle |
| Tropisternus ellipticus | Giant Water Scavenger Beetle |
| Tropisternus lateralis humeralis | Water Scavenger Beetle |
| Tropisternus lateralis limbalis | Beetle |
| Trox atrox | Hide Beetle |
| Trox fascifer | Hide Beetle |
| Trox scaber | Hide Beetle |
| Truttaedacnitis truttae | Parasite |
| Trypanosyllis gemmipara | Brown Jewel Necklace-Worm |
| Trypanosyllis ingens | Purple-Stub Necklace-Worm |
| Trypodendron betulae | Palm Seed Borer |
| Trypodendron domesticum | Bark Beetle |
| Trypodendron rufitarsis | Bark And Ambrosia Beetle |
| Trypophloeus populi | Bark And Ambrosia Beetle |
| Trypophloeus thatcheri | Bark And Ambrosia Beetle |
| Trypostega claviculata | Bryozoa |
| Tubaphe levii | Millipede |
| Tuberculatus annulatus | True Bug |
| Tuberculatus columbiae | True Bug |
| Tuberculatus querceus | True Bug |
| Tuberolachnus salignus | True Bug |
| Tubulipora flabellaris | Bryozoa |
| Tubulipora labiata | Bryozoa |
| Tubulipora pacifica | Bryozoa |
| Tubulipora pulchra | Bryozoa |
| Tubulipora striata | Bryozoa |
| Tubulipora tuba | Bryozoa |
| Tubulipora tuba fasciculifera | Bryozoa |
| Tulsa oregonella | Moth |
| Tulsa umbripennis | Moth |
| Tunagyna debilis | Sheetweb Spider |
| Tupiocoris agilis | True Bug |
| Tupiocoris californicus | True Bug |
| Tupiocoris confusus | True Bug |
| Tupiocoris elongatus | True Bug |
| Tupiocoris rubi | True Bug |
| Tupiocoris similis | True Bug |
| Tupiocoris tibialis | True Bug |
| Tupiocoris tinctus | True Bug |
| Turbonilla aurantia | Golden Turbonille |
| Turbonilla chocolata | Gastropod |
| Turbonilla eschscholtzi | Sea Snail |
| Turbonilla lyalli | Sea Snail |
| Turbonilla pesa | Sea Snail |
| Turbonilla rinella | Gastropod |
| Turbonilla talma | Gastropod |
| Turbonilla taylori | Gastropod |
| Turbonilla torquata | Gastropod |
| Turbonilla valdezi | Gastropod |
| Turbonilla vancouverensis | Gastropod |
| Turbonilla victoriana | Gastropod |
| Turdus iliacus | Redwing |
| Turricula perversa | Gastropod |
| Tutelina similis | Jumping Spider |
| Twiningia fasciatus | True Bug |
| Twiningia pellucidus | True Bug |
| Twiningia scrupulosus | True Bug |
| Tychius lineellus | Nut and Acorn Weevil |
| Tychius meliloti | Sweet Clover Weevil |
| Tychius semisquamosus | Nut and Acorn Weevil |
| Tychius stephensi | Red Clover Seed Weevil |
| Tychius tectus | Nut and Acorn Weevil |
| Tympanophorus puncticollis | Large Rove Beetle |
| Typhaea stercorea | Hairy Fungus Beetle |
| Typhlocyba alcorni | True Bug |
| Typhlocyba ariadne | True Bug |
| Typhlocyba ariste | True Bug |
| Typhlocyba avellanae | True Bug |
| Typhlocyba barbata | True Bug |
| Typhlocyba candidula | True Bug |
| Typhlocyba cassiopeia | True Bug |
| Typhlocyba commissuralis | True Bug |
| Typhlocyba crassa | True Bug |
| Typhlocyba dejecta | True Bug |
| Typhlocyba dorsti | True Bug |
| Typhlocyba euphrante | True Bug |
| Typhlocyba froggatti | True Bug |
| Typhlocyba frustrator | True Bug |
| Typhlocyba gillettei | True Bug |
| Typhlocyba hockingensis | True Bug |
| Typhlocyba inflata | True Bug |
| Typhlocyba latifasciata | True Bug |
| Typhlocyba lethierryi | True Bug |
| Typhlocyba oregonensis | True Bug |
| Typhlocyba plebeja | True Bug |
| Typhlocyba pomaria | True Bug |
| Typhlocyba prunicola | True Bug |
| Typhlocyba putmani | True Bug |
| Typhlocyba quercus | True Bug |
| Typhlocyba rosae | True Bug |
| Typhlocyba scripta | True Bug |
| Typhlocyba spinosa | True Bug |
| Typhloscolex muelleri | Polychaete Worm |
| Typosyllis alternata | Polychaete Worm |
| Typosyllis armillaris | Polychaete Worm |
| Typosyllis fasciata | Polychaete Worm |
| Typosyllis harti | Polychaete Worm |
| Typosyllis hyalina | Polychaete Worm |
| Typosyllis pulchra | Polychaete Worm |
| Typosyllis stewarti | Polychaete Worm |
| Tyrannus dominicensis | Gray Kingbird |
| Tytthus pubescens | True Bug |
| Tytthus pygmaeus | True Bug |
| Udea abstrusa | Moth |
| Udea derasa | Moth |
| Udea inquinatalis | Moth |
| Udea itysalis | Moth |
| Udea livida | Moth |
| Udea nordeggensis | Moth |
| Udea rubigalis | Celery Leaftier |
| Udea saxifragae | Moth |
| Udea turmalis | Moth |
| Ufeus hulstii | Moth |
| Uloborus glomosus | Spider |
| Ulochaetes leoninus | Elderberry Longhorn Beetle |
| Uloma longula | Flour Beetle |
| Umbellula lindahli | Droopy Sea Pen |
| Umbonula arctica | Bryozoa |
| Unamis columbiensis | Rove Beetle |
| Unamis fulvipes | Rove Beetle |
| Unamis kootenayensis | Rove Beetle |
| Unaspis euonymi | True Bug |
| Underwoodia tida | Millipede |
| Unoka gillettei | True Bug |
| Upis ceramboides | Darkling Beetle |
| Urnatella gracilis | Entoproct |
| Uroblaniulus ?idahoanus | Millipede |
| Uroleucon achilleae | True Bug |
| Uroleucon ambrosiae | True Bug |
| Uroleucon breviscriptum | True Bug |
| Uroleucon canadense | True Bug |
| Uroleucon carberriense | True Bug |
| Uroleucon chani | True Bug |
| Uroleucon cirsii | True Bug |
| Uroleucon eoessigi | True Bug |
| Uroleucon erigeronense | True Bug |
| Uroleucon escalantii | True Bug |
| Uroleucon gigantiphagum | True Bug |
| Uroleucon gravicorne | True Bug |
| Uroleucon hieracicola | True Bug |
| Uroleucon longirostre | True Bug |
| Uroleucon nigrotuberculatum | True Bug |
| Uroleucon olivei | True Bug |
| Uroleucon paucosensoriatum | True Bug |
| Uroleucon penderum | True Bug |
| Uroleucon pseudambrosiae | True Bug |
| Uroleucon rudbeckiae | True Bug |
| Uroleucon russellae | True Bug |
| Uroleucon solidaginis | True Bug |
| Uroleucon sonchi | True Bug |
| Uroleucon taraxaci | True Bug |
| Uroleucon vancouverense | True Bug |
| Urosalpinx cinerea | Atlantic Oyster Drill |
| Urothoe varvarini | Amphipod |
| Usingerella bakeri | True Bug |
| Usofila pacifica | Telemid Spider |
| Utacapnia columbiana | Stonefly |
| Utacapnia trava | Stonefly |
| Utamphorophora crataegi | True Bug |
| Utaperla sopladora | Stonefly |
| Utobium elegans | Deathwatch Beetle |
| Utobium granulatum | Ptinid Beetle |
| Utobium marmoratum | Puffball Beetle |
| Uvarus subplicatus | Predacious Diving Beetle |
| Uvarus subtilis | Predaceous Diving Beetle |
| Vacusus nigritulus | pseudo |
| Valettiopsis dentata | Amphipod |
| Vallonia cyclophorella | Silky Vallonia |
| Vanadis longissima | Polychaete Worm |
| Vanduzeeina balli | True Bug |
| Vanduzeeina borealis | True Bug |
| Vasingtona irritans | Millipede |
| Vellica longipennis | Rove Beetle |
| Velutina rubra | Red Velvet Snail |
| Venusia duodecemlineata | Moth |
| Venusia pearsalli | Pearsall's Carpet Moth |
| Veraphis lacuna | Ant-Like Stone Beetle |
| Vermivora chrysoptera | Golden-winged Warbler |
| Vermontia thoracica | Sheetweb Spider |
| Vertigo andrusiana | Pacific Vertigo |
| Vertigo arthuri | Callused Vertigo |
| Vertigo cristata | Crested Vertigo |
| Vertigo elatior | Tapered Vertigo |
| Vertigo gouldii | Variable Vertigo |
| Vesicomya gigas | Verticord Clam |
| Vesicomya kilmeri | Clam |
| Vesicomya pacifica | Verticord Clam |
| Vesicomya stearnsii | Verticord Clam |
| Vesiculentomon marshalli | Protura |
| Vespa simillima | Yellow Hornet |
| Vespula atropilosa | Prairie Yellowjacket |
| Vespula austriaca | Boreal Yellowjacket |
| Vibilia australis | Amphipod |
| Vilasina seminuda | Partly-Sculptured Crenella |
| Vilasina verinicosa | Varniched Crenella |
| Vireo bellii | Bell's Vireo |
| Vireo philadelphicus | Philadelphia Vireo |
| Visoka cataractae | Stonefly |
| Vitjaziana gurjanovae | Amphipod |
| Vitula broweri | Brower's Vitula |
| Vitula serratilineella | Beehive Honey Moth |
| Vitula setonella | Moth |
| Vrilletta decorata | Death-watch Beetle |
| Wabasso cacuminatus | Sheetweb Spider |
| Wahlgreniella arbuti | True Bug |
| Wahlgreniella nervata | True Bug |
| Wahlgreniella vaccinii | True Bug |
| Walckenaeria atrotibialis | Sheetweb Spider |
| Walckenaeria auranticeps | Sheetweb Spider |
| Walckenaeria castanea | Sheetweb Spider |
| Walckenaeria columbia | Sheetweb Spider |
| Walckenaeria communis | Sheetweb Spider |
| Walckenaeria cornuella | Sheetweb Spider |
| Walckenaeria cuspidata brevicula | Sheetweb Spider |
| Walckenaeria directa | Sheetweb Spider |
| Walckenaeria exigua | Sheetweb Spider |
| Walckenaeria karpinskii | Sheetweb Spider |
| Walckenaeria kochi | Sheetweb Spider |
| Walckenaeria lepida | Sheetweb Spider |
| Walckenaeria monoceras | Sheetweb Spider |
| Walckenaeria pellax | Sheetweb Spider |
| Walckenaeria subspiralis | Sheetweb Spider |
| Walckenaeria tricornis | Sheetweb Spider |
| Walckenaeria vigilax | Sheetweb Spider |
| Walshia miscecolorella | Sweetclover Root Borer |
| Wecomedon similis | Amphipod |
| Wecomedon wecomus | Amphipod |
| Wecomedon wirketis | Amphipod |
| Wehrdikmansia cervipedis | Parasite |
| Wellcomia evoluta | Parasite |
| Wesmaelius brunneus | Brown Lacewing |
| Wesmaelius coloradensis | Brown Lacewing |
| Wesmaelius furcatus | Brown Lacewing |
| Wesmaelius involutus | Brown Lacewing |
| Wesmaelius longifrons | Brown Lacewing |
| Wesmaelius nervosus | Brown Lacewing |
| Wesmaelius pretosus | Brown Lacewing |
| Westwoodilla brevicalcar | Amphipod |
| Westwoodilla caecula | Amphipod |
| Westwoodilla megalops | Amphipod |
| Wigginsia wigginsi | Sponge |
| Wockia asperipunctella | Moth |
| Wormaldia gabriella | Caddisfly |
| Wormaldia occidea | Caddisfly |
| Wubana atypica | Sheetweb Spider |
| Wubana drassoides | Sheetweb Spider |
| Wubana ornata | Sheetweb Spider |
| Wubana pacifica | Sheetweb Spider |
| Wubana suprema | Spider |
| Xanthippus corallipes | Red-shanked Grasshopper |
| Xanthochroina bicolor | False Blister Beetle |
| Xanthogaleruca luteola | Elm Leaf Beetle |
| Xantholinus linearis | Crab-like Rove Beetle |
| Xantholinus linearis linearis | Beetle |
| Xantholinus longiventris | Crab-like Rove Beetle |
| Xanthorhoe algidata | Moth |
| Xanthorhoe baffinensis | Moth |
| Xanthorhoe borealis | Moth |
| Xanthorhoe clarkeata | Moth |
| Xanthorhoe delectaria | Moth |
| Xanthorhoe fossaria | Moth |
| Xanthorhoe iduata | Moth |
| Xanthorhoe lagganata | Moth |
| Xanthorhoe macdunnoughi | Moth |
| Xanthorhoe packardata | Moth |
| Xanthorhoe pontiaria | Moth |
| Xanthorhoe ramaria | Moth |
| Xanthotype sospeta | Crocus Geometer Moth |
| Xanthotype urticaria | False Crocus Geometer Moth |
| Xanthrochroina bicolor | False Blister Beetle |
| Xeneretmus latifrons | Blacktip Poacher |
| Xeneretmus leiops | Smootheye Poacher |
| Xeneretmus triacanthus | Bluespotted Poacher |
| Xenobalanus globicipitis | Pilot Whale Barnacle |
| Xenochodaeus luscinus | Sand-loving Scarab Beetle |
| Xenodusa reflexa | Rove Beetle |
| Xenolechia velatella | Moth |
| Xenomystax atrarius | Twinpored Eel |
| Xenos peckii | Twisted-Wing Parasite |
| Xenota apposita | Rove Beetle |
| Xenota brumalis | Rove Beetle |
| Xenota carlottae | Rove Beetle |
| Xenota districta | Rove Beetle |
| Xenota fanatica | Rove Beetle |
| Xenota metlakatlana | Rove Beetle |
| Xenota mollicula | Rove Beetle |
| Xenota mordax | Rove Beetle |
| Xenota postulans | Rove Beetle |
| Xenota relicta | Rove Beetle |
| Xenota remulsa | Rove Beetle |
| Xenota resplendens | Rove Beetle |
| Xenota rurigena | Rove Beetle |
| Xenota subintima | Rove Beetle |
| Xenota sumpta | Rove Beetle |
| Xenotemna pallorana | Moth |
| Xenus cinereus | Terek Sandpiper |
| Xerophloea zionis | True Bug |
| Xerosaprinus acilinea | Clown Beetle |
| Xerosaprinus coerulescens | Clown Beetle |
| Xerosaprinus lubricus | Clown Beetle |
| Xerosaprinus wenzeli | Clown Beetle |
| Xestia atrata | Cutworm Moth |
| Xestia bryanti | Cutworm Moth |
| Xestia dilucida | Dull Reddish Dart |
| Xestia fabulosa | Cutworm Moth |
| Xestia infimatis | Cutworm Moth |
| Xestia intermedia | Moth |
| Xestia lupa | Cutworm Moth |
| Xestia lyngei | Moth |
| Xestia maculata | Cutworm Moth |
| Xestia mixta | Cutworm Moth |
| Xestia normanianus | Norman's Dart |
| Xestia perquiritata | Cutworm Moth |
| Xestia praevia | Cutworm Moth |
| Xestia tecta | Moth |
| Xestia ursae | Cutworm Moth |
| Xestia vernilis | Moth |
| Xestobium abietis | Deathwatch Beetle |
| Xestobium affine | Puffball Beetle |
| Xestobium marginicolle | Deathwatch Beetle |
| Xestocephalus fulvifrons | True Bug |
| Xestocephalus superbus | True Bug |
| Xestoleptura behrensi | Elderberry Longhorn Beetle |
| Xestoleptura behrensii | Long-horned Beetle |
| Xestospongia trindanea | Sponge |
| Xyleborinus attenuatus | Palm Seed Borer |
| Xyleborinus saxesenii | Beetle |
| Xyleborus dispar | Bark And Ambrosia Beetle |
| Xyleborus intrusus | Palm Seed Borer |
| Xyleborus pfeilii | Bark Beetle |
| Xyleborus xylographus | Palm Seed Borer |
| Xylechinus montanus | Bark and Ambrosia Beetle |
| Xylena brucei | Cutworm Moth |
| Xylena cineritia | Gray Swordgrass Moth |
| Xyletinus confusus | Deathwatch Beetle |
| Xyletinus fucatus | Deathwatch Beetle |
| Xyletinus rotundicollis | Deathwatch Beetle |
| Xylita laevigata | False Darkling Beetle |
| Xylita livida | False Darkling Beetle |
| Xylocoris cursitans | True Bug |
| Xylocoris galactinus | True Bug |
| Xylocoris umbrinus | True Bug |
| Xylocrius agassizi | Elderberry Longhorn Beetle |
| Xylodromus concinnus | Rove Beetle |
| Xylodromus depressus | Ocellate Rove Beetle |
| Xylomoia chagnoni | Moth |
| Xylophaga dorsalis | Cockle |
| Xylophaga washingtona | Piddock Clam |
| Xylophilus cylindriformis | False Click Beetle |
| Xylosandrus germanus | Black Stem Borer |
| Xyloterinus politus | Palm Seed Borer |
| Xylotrechus annosus emotus | Longhorned Beetle |
| Xylotrechus lengi | Longhorned Beetle |
| Xylotrechus mormonus | Elderberry Longhorn Beetle |
| Xylotrechus nauticus | Long-horned Beetle |
| Xylotype arcadia | Cutworm Moth |
| Xyonysius californicus californicus | True Bug |
| Xyphon triguttatum | True Bug |
| Xysticus californicus | Ground Crab Spider |
| Xysticus canadensis | Ground Crab Spider |
| Xysticus cunctator | Ground Crab Spider |
| Xysticus discursans | Ground Crab Spider |
| Xysticus durus | Ground Crab Spider |
| Xysticus elegans | Elegant Crab Spider |
| Xysticus ellipticus | Ground Crab Spider |
| Xysticus emertoni | Ground Crab Spider |
| Xysticus ferox | Ground Crab Spider |
| Xysticus gertschi | Ground Crab Spider |
| Xysticus gosiutus | Ground Crab Spider |
| Xysticus gulosus | Ground Crab Spider |
| Xysticus keyserlingi | Ground Crab Spider |
| Xysticus locuples | Ground Crab Spider |
| Xysticus luctuosus | Ground Crab Spider |
| Xysticus montanensis | Ground Crab Spider |
| Xysticus nigromaculatus | Crab Spider |
| Xysticus obscurus | Ground Crab Spider |
| Xysticus pretiosus | Ground Crab Spider |
| Xysticus punctatus | Ground Crab Spider |
| Xysticus rugosus | Ground Crab Spider |
| Xysticus triangulosus | Ground Crab Spider |
| Xysticus triguttatus | Threebanded Crab Spider |
| ybomitra zonalis | Horse Fly |
| Yoldia montereyensis | Monterey Yoldia |
| Yoldiella nana | Sibling Yoldia |
| Yoldiella orcia | California Yoldia |
| Yoraperla brevis | Stonefly |
| Yoraperla mariana | Stonefly |
| Yoraperla siletz | Stonefly |
| Yponomeuta cagnagella | Spindle Ermine Moth |
| Yponomeuta malinellus | Apple Ermine Moth |
| Yponomeuta padella | Orchard Ermine Moth |
| Ypsilothuria bitentaculata | Sea Cucumber |
| Ypsolopha cervella | Moth |
| Ypsolopha dentella | European Honeysuckle Moth |
| Ypsolopha dentiferella | Moth |
| Ypsolopha dorsimaculella | Moth |
| Ypsolopha schwarziella | Moth |
| Ypsolopha senex | Moth |
| Ypsolopha sublucella | Moth |
| Ypsolopha ustella | Moth |
| Ypsolopha walsinghamiella | Moth |
| Zacoleus idahoensis | Sheathed Slug |
| Zacotus matthewsii | Bombardier Beetle |
| Zaitzevia milleri | Riffle Beetle |
| Zaitzevia parvula | Riffle Beetle |
| Zaitzevia posthonia | Riffle Beetle |
| Zanomys aquilonia | Hackledmesh Weaver |
| Zaolutus actius | Wormy Anemone |
| Zapada cinctipes | Stonefly |
| Zapada columbiana | Stonefly |
| Zapada frigida | Stonefly |
| Zapada haysi | Stonefly |
| Zapada oregonensis | Stonefly |
| Zeiraphera canadensis | Spruce Bud Moth |
| Zeiraphera fortunana | Yellow Spruce Budworm Moth |
| Zeiraphera hesperiana | Moth |
| Zeiraphera pacifica | Moth |
| Zeiraphera unfortunana | Purple-Striped Shootworm Moth |
| Zeiraphera vancouverana | Moth |
| Zelleria haimbachi | Pine Needle Sheathminer |
| Zelleria pyri | Moth |
| Zelotes exiguoides | Ground Spider |
| Zelotes fratris | Ground Spider |
| Zelotes hentzi | Ground Spider |
| Zelotes puritanus | Ground Spider |
| Zelotes rainier | Ground Spider |
| Zelotes sula | Ground Spider |
| Zelotes tuobus | Ground Spider |
| Zenodoxus sidalceae | Moth |
| Zenophleps alpinata | Moth |
| Zeridoneus costalis | True Bug |
| Zesticulus profundorum | Flabby Sculpin |
| Zeugophora abnormis | Megalopodid Leaf Beetle |
| Zeugophora atra | Megalopodid Leaf Beetle |
| Zeugophora consanguinea | Leaf Beetle |
| Zeugophora multnomah | Leaf Beetle |
| Zeugophora scutellaris | Leaf Beetle |
| Zeugophora varians | Megalopodid Leaf Beetle |
| Zeuxo normani | Isopod |
| Zicrona caerulea | True Bug |
| Zilora hispida | False Darkling Beetle |
| Zilora occidentalis | False Darkling Beetle |
| Ziphius cavirostris | Goose-Beaked Whale |
| Zodarion rubidum | Spider |
| Zonitis vermiculata | Blister Beetle |
| Zonothrix columbianus | Parasite |
| Zootermopsis nevadensis | Nevada Dampwood Termite |
| Zophodia grossulariella | Gooseberry Fruitworm Moth |
| Zora hespera | Zoroid Spider |
| Zornella armata | Spider |
| Zornella cryptodon | Sheetweb Spider |
| Zoroaster ophiurus | Sea Star |
| Zorochros caurinus | ctenicera |
| Zorochros dispersus | Click Beetle |
| Zschokkella hildae | Parasite |
| Zygethobius columbiensis | Centipede |
| Zygiella nearctica | Orbweaver |
| Zygina flammigera | True Bug |
| Zygocotyle lunata | Parasite |
| Zygonemertes albida | Ribbon Worm |
| Zygonemertes thalassina | Ribbon Worm |
| Zygottus corvallis | Sheetweb Spider |
| Zyras obliquus | Rove Beetle |