Gray Petaltail dragonflies (female, male)

Several Gray Petaltail dragonflies (Tachopteryx thoreyi) were observed at an undisclosed location in Fairfax County, Virginia USA. Only two individuals perched long enough to pose for photos.

The first one I spotted was perched relatively high on a tree on the earthen berm of a small pond. This individual is a female, as indicated by her rounded hind wings and terminal appendages. I was able to take just four photos of the female before she flew toward the top of the same tree.

05 JUN 2021 | Fairfax County, VA | Gray Petaltail (female)

Quite a while later, I spotted another Gray Petaltail land on another tree briefly, and by “briefly” I mean briefly. I had time for one shot as I was approaching the tree slowly, and just like that, the dragonfly flew toward the top of another tree. This individual is a male, as indicated by his “indented” hind wings and terminal appendages.

05 JUN 2021 | Fairfax County, VA | Gray Petaltail (male)

As it turns out, the preceding male was the last Gray Petaltail I saw for the day. Mike Powell and I had noticed the Grays seemed to be spending a lot of time in the tree canopy. I speculated their atypical behavior might be caused by the peak- or near-peak activity of Brood X Peridical Cicadas. Mike was, as always, skeptical of my speculation.

A little more than a week later, a post by Harold Bancroft White in the Northeast Odonata Facebook group seems to provide some support for my speculative theory. I like it when Gray Petaltails perch near the ground, so I hope their new hunting habit isn’t imprinted on the next generation!

Copyright © 2021 Walter Sanford. All rights reserved.

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