Emeralds
Family Corduliidae
Genus Dorocordulia
Racket-tailed Emerald (Dorocordulia libera)



Similar species – American Emerald (Cordulia shurtleffi).


Flight season: late May to late July.

Population: common and widespread. Found near ponds, small lakes and fens, but often forages a fair distance from water.

Length about 40 mm. The yellow-orange mark on S3 and narrow abdomen that flares at the tip (more so in males than females) separate this dragonfly from the American Emerald.


East of Tweed, Ontario, near the intersection of Alexander Street and the trans-Canada Trail: disturbed field supporting tall grasses and wildflowers, bordered by shrubs and trees with a sand and rock-bottomed creek to the east.
Male Racket-tailed Emerald (Dorocordulia libera) – an older individual. Immature emeralds have brown eyes that turn a deep glowing green with increasing age (June 14, 2011).


East of Tweed, Ontario, near the old railroad (trans-Canada Trail) bridge over the Moira River: rock-bottomed river, fast current, shrubs and trees along the shoreline.
Male Racket-tailed Emerald (Dorocordulia libera)
May 30, 2011

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Female Racket-tailed Emerald (Dorocordulia libera)
May 30, 2011


North of Tweed, Ontario, the Skootamatta River at Storrings Bridge: rock-bottomed river with fast flowing water, rapids and emergent rocks, and a steep rocky shoreline bordered by woodlands.
A female Racket-tailed Emerald (Dorocordulia libera) that has found a handy place to perch while eating a Deer Fly (June 17, 2011).


Tweed, Ontario, along the trans-Canada Trail about 2 km west of town: woodlands and meadows supporting tall grasses and wildflowers, with nearby marshes providing breeding habitat.
Racket-tailed Emerald (Dorocordulia libera), wheel
June 26, 2012