Flight season: early May to mid-July.
Population: not uncommon, but encountered less often than the Racket-tailed Emerald.
Found near ponds, small lakes and fens.
Length: about 45 mm.
Look for a pale thin ring on S3 and (in males) the forked epiproct (lower clasper).
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Tweed, north shore of Stoco Lake:
sand-bottomed beach and swimming area with very little vegetation along the shoreline.
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Male American Emerald (Cordulia shurtleffi)
June 07, 2010
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Tweed, Ontario, east of town along the trans-Canada Trail:
woodland with clearings created by the trail, Stoco Lake is nearby to the south.
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Male American Emerald (Cordulia shurtleffi), claspers
May 14, 2012
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Stoco Fen, east of Tweed on East Hungerford Road:
relatively little open water compared to a marsh.
Wetland supporting sedges, orchids, Bog Labrador Tea, Pitcher Plants
and other fen indicator species, trees are mainly Tamarack and Eastern White Cedar.
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Immature female American Emerald (Cordulia shurtleffi)
May 06, 2012
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East of Tweed, Ontario, along the trans-Canada Trail:
clearing at the edge of a deciduous woodland.
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Immature male American Emerald (Cordulia shurtleffi)
May 13, 2015
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East of Tweed, Ontario, along the trans-Canada Trail:
marsh supporting Cattails and sedges, bordered by alder and willow swamp.
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Immature female American Emerald (Cordulia shurtleffi)
May 13, 2015
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West of Tweed, Ontario:
a marsh supporting Cattails, ferns and sedges, bordered by swampy woodland dominated by Eastern White Cedar.
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Immature female American Emerald (Cordulia shurtleffi) – a view of the bi-lobed subgenital plate
(May 05, 2016).
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