Common Sanddragon dragonflies (males)

Two Common Sanddragon dragonflies (Progomphus obscurus) were spotted along a mid-size stream at an undisclosed location in Prince William County, Virginia USA.

Both individuals are male, as indicated by their terminal appendages and “indented” hind wings.

Male No. 1

I spotted a Common Rockdragon while searching for Eastern Least Clubtail (Stylogomphus albistylus). OK, OK, there is no species of dragonfly called “Common Rockdragon.” My point is simply this: Common Sanddragon is typically found perching on sand rather than rocks. Any perch in a storm I guess.

17 JUN 2021 | PNC. Wm. County | Common Sanddragon (male)

Anyway, this guy was super skittish — I got one shot before he flew away. I waited a while for him to return. No luck. So I moved on.

Male No. 2

I stopped to rest at a sandy bank (located farther upstream from the first location)  where I have seen/photographed Common Sanddragon in the past. Sure enough, a male Common Sanddragon landed on the beach soon after I sat down on my camp stool.

The first photo is cropped for better composition.

17 JUN 2021 | PNC. Wm. County | Common Sanddragon (male)

He took flight several times but always returned to the same place. I speculate he was actively hunting insects flying over the stream.

The next two photos are full-frame (4,000 x 3,000 pixels), that is, uncropped.

17 JUN 2021 | PNC. Wm. County | Common Sanddragon (male)

The male’s “indented” hind wings (see “Related Resource”) are shown clearly in the full-size versions of these photos.

17 JUN 2021 | PNC. Wm. County | Common Sanddragon (male)

Related Resource

Ed Lam, author and illustrator of Damselflies of the Northeast, created the following composite image that shows how to differentiate male and female Common Sanddragons. Notice the difference in the shape of male and female hind wings: male hind wings are “indented” near the body; female hind wings are rounded.


Copyright © 2021 Walter Sanford. All rights reserved.

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