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Libellula quadrimaculata
Four-Spotted Skimmer
Family: Libellulidae
Species account author: Robert Cannings.
Extracted from Introducing the Dragonflies of British Columbia and the Yukon (2002)

Photograph

© Aaron Marshall     (Photo ID #39591)

Map

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Distribution of Libellula quadrimaculata in British Columbia.
(Click on the map to view a larger version.)
Source: (for the static map) RBCM and BCCDC 2004 ©

Species Information


Description

Grey-brown to yellow-brown, except for the black end of the abdomen. The thorax has yellow and black marks on the sides; the abdomen has narrow yellow side stripes. Each wing has a small dark spot at the midpoint of the front edge, and the hindwings have a dark triangular patch at the base. A golden stripe on the front edge of each wing can be prominent or vague. Length: ♂ ♀ 43mm.


Flight Period

B.C., late April to early October; Yukon, late May to late July.

Genus Description


Three striking king skimmers live in B.C.; two others have recently been moved to other genera – Ladona and Plathemis. Many species have banded or spotted wings, and in some species, males sport abdomens covered with white or bluish pruinescence. Showy and aggressive, king skimmers perch, hover and skim over the waters of ponds, lakeshores and sluggish streams. During egg laying, a female taps the water with the end of her abdomen; she flies alone or is guarded by her mate hovering nearby. Females of most species have small flaps on the sides of segment 8 that help them splash water along with their eggs, often depositing them on the shore.

Biology

Family Description

The largest dragonfly family in our region – 24 species in eight genera live here and one other species in another genus is a rare visitor. They come in many sizes and colours, many with bold wing markings or coloured veins. Their eyes meet broadly on top of the head. The anal loop in the hindwing is distinctive: foot-shaped with a long toe. Most common around ponds, marshy lakeshores and sluggish streams, the adults dart about and most species spend a lot of time perched horizontally in the sun. Females lay eggs alone or in the company of guarding males. Most dip the tip of their abdomen into the water when releasing the eggs, but some will tap or splash the eggs into wet mud or moss, or simply flick them into a dry pond basin. Some larvae, like those of the emeralds, move sluggishly or squat on the bottom mud; others climb in vegetation.
Field Notes

Lives in marshy-edged waters, from mountain and northern bogs and fens to warm alkaline ponds in southern valleys; most common in acidic waters. One of the earliest dragonflies in the spring.

Distribution


Widespread; also across Eurasia. Throughout B.C. and the southern half of the Yukon.

Status Information

Origin StatusProvincial StatusBC List
(Red Blue List)
COSEWIC
NativeS5YellowNot Listed



BC Ministry of Environment: BC Species and Ecosystems Explorer--the authoritative source for conservation information in British Columbia.