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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Dragonflies and Damselflies (Odonata) » Dragonflies (Anisoptera) » Emeralds (Corduliidae) » American Emerald (Cordulia) » American Emerald (Cordulia shurtleffii)
Photo#1454618
Cordulia shurtleffii
Copyright © 2017 Michael Patrikeev

Cordulia shurtleffii
Almonte, Lanark, Ontario, Canada
June 14, 2017
Identified as Cordulia shurtleffii by a Bug Guide expert.

Images of this individual: tag all
Cordulia shurtleffii Cordulia shurtleffii Cordulia shurtleffii
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Contributed by Michael Patrikeev on 13 October, 2017 - 10:03pm
Last updated 16 October, 2017 - 10:30am

Moved
Moved from American Emerald.
… Michael Patrikeev, 16 October, 2017 - 10:30am login or register to post comments

Moved
Moved from ID Request.
… Michael Patrikeev, 16 October, 2017 - 10:29am login or register to post comments

another Cordulia
.
… Larry de March, 14 October, 2017 - 6:02am login or register to post comments

 
Hi Larry, Thanks for ident
Hi Larry,

Thanks for identifying this. My guide, Jones et al. 2013, does not show hair at the claspers of Cordulia shurtleffii, but perhaps it is an omission.

Should I change all green-eyed emerald from my latest submission to Cordulia shurtleffii?

Are the green-eyed individuals all male or perhaps eye-colour (and abdomen color?) change as the insect matures?
… Michael Patrikeev, 15 October, 2017 - 1:29pm login or register to post comments

 
Jones et al
Many of the illustrations, including the ones of Cordulia in that book, are no better than bad cartoons. The Whiteface and Meadowhawk whole critter illustrations are particularly bad.

Compare what you have to some good photos available a number of places including here on BugGuide. I skimmed what you submitted and I think they were all Cordulia apart from the Racket-tailed which I confirmed. You'll have to check them all.

The green eye colour develops with age and can be different between the sexes depending on species.
… Larry de March, 15 October, 2017 - 1:45pm login or register to post comments

 
Thanks! It's good to know abo
Thanks! It's good to know about Jones et al. ... it is considered the best guide for the Algonquin-Ottawa area ... perhaps this is why I have had hard time identifying what appears to be common species.
… Michael Patrikeev, 15 October, 2017 - 2:06pm login or register to post comments

 
good guide
Dragonflies and Damslflies of the East by Dennis Paulson.
… Larry de March, 15 October, 2017 - 2:16pm login or register to post comments

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