Normally when I photograph a new species of dragonfly I am immediately ecstatic, but that was not the case on Tuesday. After a long day of searching for Uhler’s Sundragons (Helocordulia uhleri) in Prince William County with fellow dragonfly enthusiast Walter Sanford, we were excited when we finally spotted a few of them. It had been an overcast day and it was only when the sun came out after noon that the dragonflies began to appear. Walter was thrilled, but my excitement was a little more muted, because I had photographed this species the previous week—check out my posting First dragonflies of the season for details and photos of my adventures that day.
After a while, Walter noted to me that all of the Uhler’s Sundragons that he had seen so far were female and that he hoped he would see a male. This may sound a little strange, but with some species of dragonflies, the females hang out in a separate area from the males until they are ready to mate, so you do not always see the genders intermixed.
I was wandering around the area a bit, as I am prone to do, when Walter called out to me that he had found a male. I rushed over and managed to get some shots of the specimen, including the first two images below. As it turns out, that was the only male that we saw all day.
The following day, Walter sent me an excited Facebook message informing me that the male dragonfly that we had both photographed was not a Uhler’s Sundragon, but was a Selys’s Sundragon (Helocordulia selysii), a similar species that neither of us had ever seen before. Walter did a records search and it looks the species had never before been documented in Prince William County. Finally I was ecstatic.
How did we not notice immediately that this was a different species? One of the primary differences between the species is that Uhler’s Sundragons have amber-colored markings mixed with dark ones at the base of their wings, while Selys’s Sundragons have only the dark markings. Given the small size of these dragonflies, these differences are hard to spot in the field, but are much easier to see when reviewing images afterwards.
For comparison purposes, I have included a photo of a male Uhler’s Sundragon that I photographed last week. If you look carefully, you can see the amber-colored markings in the final photo that are absent in the first two photos.
You may also notice that there is a spider on the branch in the final photo that appears to be reaching down and tapping the dragonfly on the “shoulder.” In this scenario, I am not sure which species would be the predator and which would be the prey. I have documented several cases in which dragonflies have been caught in spiderwebs and also a case when a jumping spider took down a much larger dragonfly (see my 2014 posting Spider captures dragonfly—the story for a fascinating series of images).
If you would like to see Walter’s account of our encounter with the Selys’s Sundragon, check out his blog posting today entitled Selys’s Sundragon dragonfly (male).
Selys’s Sundragon, 13 April 2021
Selys’s Sundragon, 13 April 2021
Uhler’s Sundragon, 8 April 2021
© Michael Q. Powell. All rights reserved.
