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Posts Tagged ‘Gomphurus lineatifrons’

Most of you know that I love to photograph dragonflies. In a recent posting, I thought I was featuring photos of a Cobra Clubtail dragonfly, but it turns out that it was a Splendid Clubtail dragonfly. Here is Walter Sanford’s behind the scenes account of the initial misidentification of the dragonfly, with photos showing the differences between the two species, and how experts determined that we had made an error. His posting provides some fascinating insights into the complications sometimes associated with making an identification of a species (and why it is important to photograph subjects from multiple angles, if possible).

Be sure to click on the “View original post link” if you are using the WordPress Reader to read Walter’s complete posting on his blog or go directly to his posting by using this link.

walter sanford's photoblog

A Splendid Clubtail dragonfly (Gomphurus lineatifrons) was spotted during a photowalk with Michael Powell at an undisclosed location in Fairfax County, Virginia USA. Easy for me to say now. As it turns out, my initial identification was incorrect.

The first photo I took of the dragonfly — the record shot — is shown below. Notice the pattern of yellow lateral marks/spots on its abdomen. Also notice the yellow blotch on the side of abdominal segment eight (S8) extends onto the club flange, as shown in the full-size version of the image. (Thanks to Michael Boatwright, founder and administrator of the Virginia Odonata Facebook group, for sharing these key field marks for Splendid.)

26 MAY 2020 | Fairfax County, VA | Splendid Clubtail (female)

In contrast, the pattern of yellow lateral marks/spots on the abdomen of a female Cobra Clubtail (Gomphurus vastus), shown below, looks…

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UPDATE: Some experts have looked at the photos that Walter took of and it appears that the dragonfly in the first photo (and possibly all of the ones in this posting) is a Splendid Clubtail (Gomphurus lineatifrons), a new species for me. The differences between the two species are subtle enough that I am definitely relying on the expertise of others in making this identification.

I spent most of this past Tuesday exploring wild areas in Fairfax County, Virginia, hunting for dragonflies with my friend and fellow dragonfly enthusiast Walter Sanford. It is still a little early for many species, so we had to work really hard for each one that we were able to find.  I was really excited when we spotted several Cobra Clubtail dragonflies (Gomphorus vastus) during the day, all of which turned out to be females.

As you can see from these photos, the Cobra Clubtails were hanging vertically with their abdomens pointing downwards, which made them hard to spot when they landed in the abundant green vegetation. In one nearby location, there is an annual mass emergence of Cobra Clubtails, with dozens emerging at the same time. We made a brief stop there, hoping to see more Cobra Clubtails, but learned from employees there that the Cobra Clubtails have not yet arrived this year—we may make another try sometime fairly soon.

If you would like to see Walter’s posting on our adventures with the Cobra Clubtails, click on this link to his blog.

Cobra Clubtail

Cobra Clubtail

Cobra Clubtail

© Michael Q. Powell. All rights reserved.

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