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Ophiogomphus colubrinus (Boreal Snaketail)BC conservation rank: S4. Yellow List. First ranked as S3? in 1995, O. colubrinus is one species whose status was definitely changed by knowledge gained in northern surveys. Once its habitat preference was established, searches for suitable sites found it frequently.Description: The face is green with black stripes. The thorax is bright green with brown stripes, including one on the side behind the forewing base. Length: male, female 47 mm. Global Range: British Columbia east to Newfoundland; south to New York, Michigan, and Wyoming (Needham et al. 2000). Faunal element: Southern Boreal (see Appendix 2). BC Distribution: Widespread in northern and central BC, south to about 52ºN in the Cariboo, but not yet known from the dry Chilcotin. Probably more common in the far North than records suggest, especially east of the Rockies. Biology: The most northern of all North American clubtails and the only transcontinental clubtail inhabiting boreal forests. Uncommon, but can be abundant in the right habitat - clear, warm streams flowing out of forest lakes. Larvae burrow in the sand and gravel on the stream bottom; adults perch on the ground or on streamside vegetation. BC flight period: mid June to early September; records are from the last half of July and the first half of August.
Ophiogomphus colubrinus Map 3. Frequency of records in British Columbia by NTS 1/50,000 mapsheet. |
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