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Somatochlora septentrionalis (Muskeg Emerald)BC conservation rank: S4. Yellow List. Changed from S3S4 to S3? in 2000 and downgraded to S4 in 2004, this species has been shown to be more widespread than known before the northern surveys.Description: Similar to S. whitehousei, but less common. Both have a dark spot at the base of each hindwing. Both have brassy green thorax sides with a short, indistinct yellow-brown stripe below the base of the forewing (sometimes an indistinct yellowish patch below the base of the hindwing). The difference is in the shapes of the male's appendages (fig. 13h) and female's vulvar lamina (fig. 14h). Length: male 43 mm, female 44 mm. Global Range: Yukon and British Columbia east to Newfoundland and Labrador; south to Nova Scotia and the northern parts of Quebec, Ontario and the prairie provinces (Needham et al. 2000). Faunal element: Northern Boreal (see Appendix 2). BC Distribution: From the Yukon south to about 54°N on the central plateaus and about 52°N in the Coast Mountains. Most common in the extreme Northwest (Atlin); not known from the Rocky Mountains. Biology: Rare. Lives in bogs and fens ( Wb12-13; Wf07-08) where males patrol shallow ponds and pools. Typically, these pools are set in sphagnum and other mosses and are characterized by soft, mucky margins and scattered sedges. Males fly irregularly over the open water and around the pool edges, hovering infrequently. BC flight period: mid June to late August; records from early July to early August.
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