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Archive for August, 2019

Big Bluet damselflies

Posted in damselfly, Insects, Nature, Photography, Summer, wildlife, tagged , , , , , , on August 3, 2019| 3 Comments »

Recently there seems to have been an explosion of Big Bluet damselflies (Enallagma durum) at Occoquan Bay National Wildlife Refuge. This damselfly species is a coastal species and usually likes brackish water. Not surprisingly I saw them repeatedly yesterday as I walked along a trail near the water’s edge.

I like the first shot a lot, because of the repeated angled lines that provide a nice contrast with the damselfly. The second image shows a mating Big Bluet couple in a position known as the “wheel” that is viewed by many as a sidewards heart. As is usually the case with insects and with birds, the male Big Bluet is the more brightly-colored than his female counterpart.

 

Big Bluet

Big Bluet

© Michael Q. Powell. All rights reserved.

 

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Last Gray Petaltail of the year?

Posted in Dragonflies, dragonfly, Insects, Nature, Photography, Summer, wildlife, tagged , , , , , , on August 2, 2019| 2 Comments »

Although we still have quite a lot of summer remaining, some of my favorite dragonfly species have already disappeared for the season. I have been fortunate this year to see Gray Petaltail dragonflies (Tachopteryx thoreyi) on multiple occasions in several different locations. A little over a week ago I spotted this one at Occoquan Regional Park on the date that the Dragonflies of Northern Virginia website lists as the tail end of the season for this species. It is quite possible that I will have to wait until next year to see another one.

Gray Petaltails are remarkable dragonflies. They will sometime perch on you, which can be a bit disconcerting because they are so large and you can hear them when they fly by your head. Additionally, many scientists view this species as an ancient one. According to the website cited above, Gray Petaltails are “our oldest and most primitive dragonfly; species almost identical to petaltails flew alongside dinosaurs during the Jurassic period. Imagine petaltails and a herd of Brontosaurus sharing the same giant, fern-filled forests.”

It is hard to know exactly how long dragonflies have been around, but according to Wikipedia, fossils of very large dragonfly ancestors with wingspans of 30 inches (750 mm) have been found that are 325 million old. Given the ferocity of most dragonflies as predators, I am happy that modern day dragonflies are quite a bit smaller in size.

 

Gray Petaltail

 

© Michael Q. Powell. All rights reserved.

 

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Blue-fronted Dancer couple

Posted in damselfly, Insects, Nature, Photography, wildlife, tagged , , , , , , on August 1, 2019| 2 Comments »

Last Saturday I spotted this Blue-fronted Dancer damselfly (Argia apicalis) couple while exploring Riverbend Park in Great Falls, Virginia. I like this shot because it gives a good sense of the differences in coloration between the male and the female of this species. Most of the time when the damselflies are coupled, they are in contorted positions and most of the body of one or the other damselfly is out of focus in my photos. In this case, the damselflies are in the tandem position, but appear to be resting.

Blue-fronted Dancer

© Michael Q. Powell. All rights reserved.

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