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Anax junius (Common Green Darner)BC conservation rank: S5. Yellow List.Description: One of our largest dragonflies, with a wingspan of almost 12 cm. The thorax is unmarked and green. Viewed from above, the forehead bears a black spot in a blue patch. The abdomen has a dark centre stripe; on immatures, the sides are reddish, but with age the male's become blue and the female's grey-green to violet. Length: male female 75 mm. Global Range: Southern British Columbia east to Nova Scotia; south throughout all the U.S. states, northern Mexico and the Caribbean. (Needham et al. 2000). Faunal element: Austral (also in parts of Asia and Oceania) (see Appendix 2). BC Distribution: Southern BC to the Prince George region. Biology: Uncommon across southern BC, but common in some coastal localities. Develops in warm marshes and ponds at low elevations (Wm04-06). Southern Canada appears to have two populations - one seems to migrate north in the spring and lays eggs, their offspring developing rapidly and flying south in August and September; the other population is resident all year round, the adults taking flight in June and July. BC flight period: late April to early October; all records range from early May to early September.
Anax junius Map 1. Geographical distribution and seasonal abundance of records in British Columbia. Anax junius Map 3. Frequency of records in British Columbia by NTS 1/50,000 mapsheet. Anax junius Map 4. Frequency of collection localities in British Columbia by NTS 1/50,000 mapsheet. |
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