Conservation Status
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Common (Paulson, 2009).
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Cyclicity
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June to October in British Columbia (Paulson, 2009).
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Distribution
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Spans southern Canada from British Columbia to Newfoundland. Found as far south as Minnesota and New Jersey (Paulson, 2009).
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General Description
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Half blue and half yellow stripes on lateral sides of thorax narrow or broken into spots as the scientific name suggests (see lateral image).Most other congeneric species (e.g. A. eremita and A. juncea) have more prominent and unbroken thoracic stripes (Paulson, 2009).
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Habitat
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Lakes and ponds with vegetation and open water (Hutchings and Halstead, 2011).
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Life Cycle
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Females oviposit on floating vegetation. Nymphs are aquatic predators among vegetation. Adults are terrestrial and hunt insects in flight (Cannings, 2002). Adults are capable of migrating in large numbers across long distances (Catling and Kostiuk, 2008).
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Trophic Strategy
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Both adults and nymphs are predatory (Cannings, 2002).
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Variable darner
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Variable darner: Brief Summary
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The variable darner (Aeshna interrupta) is a dragonfly of the family Aeshnidae, native from Alaska through the Northwest Territories to Newfoundland, south to New Hampshire and Michigan in the eastern United States, and to the mountains of New Mexico, Arizona, and California in the west. It's named after the distinctive broken stripes on the sides of the thorax of many male specimens. It lives in many habitats from northern and mountain peatlands to cattail marshes and temporary pools. It is the characteristic species of grassland ponds.
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