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Leucorrhinia borealis (Boreal Whiteface)BC conservation rank: S5. Yellow List.Description: Similar to the more common L. hudsonica, but larger and with bigger abdominal spots, including one on segment 8 in males. The spot on segment 7 reaches the end of the segment. The yellow markings of immatures turn red with age. Hamule, fig. 16a; vulvar lamina, fig. 17a. Length: male 39 mm, female 37 mm. Global range: Alaska and Yukon east to northwestern Ontario south to Minnesota, North Dakota, Saskatchewan, Montana, Colorado, Utah and Washington (Needham et al. 2000). Faunal element: Western Boreal (see Appendix 2). BC Distribution: Widespread east of the Coast Mountains. Biology: Our largest whiteface, uncommon in the southern part of its range, but more frequent in northern BC (especially east of the Rockies). Prefers deep sedge marshes Wm01-02, but lives in a variety of fens and ponds (Wm04-06; Wf01, Wf05). Primarily a species of marshes at the northern reaches of the Great Plains, where it often swarms in large numbers. The flight season is early and short. BC flight period: early May to early August; almost all records are from late May to late July.
Leucorrhinia borealis Map 3. Frequency of records in British Columbia by NTS 1/50,000 mapsheet. |
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