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Rhionaeschna californica (California Darner)BC conservation rank: S5. Yellow List.Description: Thorax stripes straight (fig. 7n) and bordered with black. The eyes are blue and the face is pale blue with a black line. Male's thorax stripes are pale blue; its upper appendages simple (fig. 9a). Female's thorax stripes and abdomen spots are pale blue or yellow. Length: male 60 mm, female 59 mm. Global Range: British Columbia south in the mountains to Mexico; also recorded in South Dakota (Needham et al. 2000). Faunal element: Cordilleran (see Appendix 2). BC Distribution: South of about 55°N (most northerly record is from the Bulkley Valley); rare north of the southern valleys (51ºN). Biology: Common around ponds, lakes and marshes at low and medium elevations. (e.g.Gs01-03; Wm01, Wm04-07). For a darner, remarkable for its springtime flight season. At the most southerly locations, it may appear in April, with the earliest dragonflies; by early August it is uncommon, just when many darners are reaching their peak abundance. BC flight period: mid April to mid August; all records lie between mid April and late July.
Rhionaeschna californica Map 3. Frequency of records in British Columbia by NTS 1/50,000 mapsheet. |
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