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Canada  Darner Pair? - Aeshna constricta - male - female

Canada Darner Pair? - Aeshna constricta - Male Female
Anoka County, Minnesota, USA
August 30, 2008
Size: About 3 inches long
Darner Pair caught in single netting - but what kind are they? It is a male Canada Darner with Green form Female (My guess)? or could it possibly be a Green Striped or Lake or Black Tipped or some other Darner?

to guide

It is Lance-tipped.

Looks like Lance-tipped to me.

Shadow or Lance-tipped Darner, I believe.
This could be Aeshna umbrosa, the Shadow Darner. The claspers at the end of the male's abdomen are very distinctive in this species. Aeshna constricta, the Lance-tipped Darner, is also a possibility. The pattern on the side of abdominal segment 2 (just behind the thorax) on the male looks more consistent with Lance-tipped based on photos I've seen. (I have personal experience with Shadow Darner but not Lance-tipped.)

Canada Darner and Lake Darner have straighter, paddle-type claspers. Also, Lake Darner would have a bold dark line across the face.

Yellow spot and S2 spot
According to my field guide(1) the Canada Darner should have a small yellow dot between the thoracic stripes, about a third of the way up the side of the thorax. The guide also points to the spot on S2 to distinguish Canada from Green-striped. Green-striped's spot is divided in top and bottom parts, or nearly divided by an indentation in the front. Canada's spot has only a small indentation.

Lake has an elongated spot, or a small stripe, where Canada has a yellow spot.

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