Almost a month ago, fellow dragonfly enthusiast Walter Sanford spotted a Selys’s Sundragon dragonfly (Helocordulia selysii), the first time that one had been spotted in Prince William County, Virginia where we were searching for dragonflies. This is an early spring dragonfly that is quite uncommon and we were both happy to get shots of it, though as I noted in my blog posting about the encounter, we did not realize until after the fact that this was a new discovery—we thought that it was a Uhler’s Sundraagon, a closely related species that I had previously seen at that location.
Whenever I encounter a brand new species in a location, I wonder if it is a one-off sighting, a vagrant who has wandered out of its normal territory, or if perhaps there is an established population. I may have gotten a partial answer to that question on Thursday when I spotted several Selys’s Sundragons a couple of miles upstream on the same creek where Walter made his initial discovery.
I managed to photograph two of these beautiful dragonflies while they perched on interrupted ferns that were growing in abundance in the area, including the dragonfly featured in the first two photos. The markings on the dragonfly’s body were quite distinctive and unfamiliar to me, given that this was the first time that I had seen this species at close range. Whenever I am out in the field, I tend not to worry about identification of my subjects and instead focus on getting the best shots that I can—I can sort things out when I get home and pull up the images on my computer screen.
A short time later, I also was able to capture some in-flight images of a Selys’s Sundragon when he cooperated for me by hovering a bit over the water. That made things marginally easier, but it is still a challenge to focus on a moving subject that is only 1.6 inches (40 mm) in length. Perhaps it is my imagination, but the dragonfly in the final photo seems to be glancing up at me, as though he was wondering if we were done yet with the photo shoot.
So, it looks like we may have at least a small established population of Selys’s Sundragons in this county. What is the flight season for the species? Walter and I were recently joking about that—as Walter pointed out, we are the baseline. We know that the season for this species in our area lasts at least from 13 April, when Walter had his initial sighting, to 6 May, when I took these photos. According to available information, the flight season for this species in our home state of Virginia lasts from 17 March to 23 May.
I hope to be able to make a return trip to this location to add another data point (and hopefully some new photos) to our information about this species or maybe some additional dragonflies are waiting to be discovered.
© Michael Q. Powell. All rights reserved.
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Mike Powell 