E-Fauna BC: Electronic Atlas of the Wildlife of British Columbia

Bombus occidentalis Greene, 1858
Western Bumble Bee; White-bottomed Bee
Family: Apidae

© Jeremy Gatten  Email the photographer   (Photo ID #56432)

E-Fauna BC Static Map
Distribution of Bombus occidentalis in British Columbia
Details about map content are available here.


The rare Western Bumble Bee is easily reocgnized by the distinctive white patch on the rump (Nihuis 2013). It was once one of the most common species of bumble bee in the Western US...but almost disappeared from a significant portion of its range (Nihuis 2013). Thorp (2013, pers. com) says "This species declined drastically in the western portions of its range from central California to southern BC over 10 years ago. It is just now beginning to show signs of recovery within scattered areas of its most severe decline, including the nearby Seattle area."

Status Information

Origin StatusProvincial StatusBC List
(Red Blue List)
NativeS2S4BlueT (May 2014)
BC Ministry of Environment: BC Species and Ecosystems Explorer--the authoritative source for conservation information in British Columbia.

Additional Photo Sources

General References

Recommended citation: Author, Date. Page title. In Klinkenberg, Brian. (Editor) 2019. E-Fauna BC: Electronic Atlas of the Fauna of British Columbia [efauna.bc.ca]. Lab for Advanced Spatial Analysis, Department of Geography, University of British Columbia, Vancouver. [Accessed: 2020-09-21 6:54:41 PM]
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© E-Fauna BC: An initiative of the Spatial Data Lab, Department of Geography, UBC