Great day for Gray Petaltails!

At least a dozen (12+) Gray Petaltail dragonflies (Tachopteryx thoreyi) were spotted during a photowalk with Michael Powell along a small stream in the forest at an undisclosed location in Prince William County, Virginia USA.

21 MAY 2019 | PNC. William County, VA | Gray Petaltail (male)

A nearly equal number of females and males were observed. This individual is a male, as indicated by his “indented” hind wings, and terminal appendages. He is perched on a fallen tree in a sunny clearing.

21 MAY 2019 | PNC. William County, VA | Gray Petaltail (male)

Adult flight period

According to records for the Commonwealth of Virginia maintained by Dr. Steve Roble, Staff Zoologist at the Virginia Department of Conservation and Recreation, Division of Natural Heritage, the adult flight period for T. thoreyi is 12 April to 09 August. The species is classified as uncommon. Its habitat is “seepage areas.”

Bear in mind, Dr. Roble’s records are for the entire state, therefore the adult flight period for T. thoreyi seems to be longer than it is in reality. The adult flight period for a single site is probably shorter — more likely around one month-or-so. For example, according to records for Northern Virginia maintained by Kevin Munroe, former manager of Huntley Meadows Park, the adult flight period for Gray Petaltail is 24 June to 25 July (peaks in late-June/early-July).

Copyright © 2019 Walter Sanford. All rights reserved.

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