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Aeshna canadensis (Canada Darner)

BC conservation rank: S5. Yellow List.
Description: Thorax stripes as in fig. 7f. The face is pale green; if a line is present, it is thin and pale brown. Blue spots mark the underside of the abdomen. Male's thorax stripes are blue to green; upper appendages simple (fig. 9a). Female has pale green (sometimes blue) markings. Length: male 68 mm, female 70 mm.
Global Range: Yukon and British Columbia east to Newfoundland (not recorded from Northwest Territories); south to Virginia, Arkansas, Nebraska, Montana and California (Needham et al. 2000). Faunal element: Transition (see Appendix 2).
BC Distribution: Widespread in southern and central BC; the most northerly record is near McLeod Lake (55ºN).
Biology: Not usually the predominant species at a locality, except on the south coast, where it can be abundant in some places. Most common in the south, uncommon in its northern range. Recorded in the Yukon, so may occur in BC's far North. Lives in peaty lakes, flooded beaver ponds, and sedge and cattail marshes at low and medium elevations (Wm01-02, Wm04-07; Wf01, 05-06).
BC flight period: mid June to late October; most records are from early July through to early September.


Aeshna canadensis mating. Photograph: George Doerksen, RBCM

Aeshna canadensis Map 1. Geographical distribution and seasonal abundance of records in British Columbia.

Aeshna canadensis Map 2. Geographical distribution of records in British Columbia before and after organized surveys began in 1996.

Aeshna canadensis Map 3. Frequency of records in British Columbia by NTS 1/50,000 mapsheet.

Aeshna canadensis Map 4. Frequency of collection localities in British Columbia by NTS 1/50,000 mapsheet.

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