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Aeshna umbrosa (Shadow Darner)BC conservation rank: S5. Yellow List.Description: Similar to A. palmata, but darker and more slender. Thorax stripes are yellow to green, often blue above and outlined with dark brown; shape, fig. 7k. The face is pale green with a pale brown line or no line; the rear of the head is partly pale. Spots on top of the abdominal segments are green or blue; segment 10 is usually black on top. The underside of the abdomen has pale blue spots. The pale areas on females are green, yellow or, rarely, blue. Male's upper appendages flattened (fig. 9c). Length: male 70 mm, female 68 mm. Global Range: Yukon and British Columbia east to Labrador and Newfoundland; south to Alabama, Oklahoma, New Mexico and California (Needham et al. 2000). Faunal element: Transition (see Appendix 2). BC Distribution: Widespread. Biology: More common in the south; uncommon in the far North. Partial to forest lakes and slow-moving streams; as its name suggests, it likes shady habitats (e.g., Wm01-02, Wm04-06; Wf01, Wf06; Wb50-52. Often found alongside A. palmata, its close and usually more common relative. The Shadow Darner is one of the latest flying species in BC, especially in the south. BC flight period: early June to mid November; most records range from early July to early October.
Aeshna umbrosa Map 3. Frequency of records in British Columbia by NTS 1/50,000 mapsheet. |
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