One of the earliest dragonflies to emerge in the spring in our area is the Blue Corporal (Ladona deplanata). Adult males are bluish in color and both the male and the female have two white stripes on their thoraxes in an area that you might think of as their shoulders. In the military of the United States, the rank insignia for corporals is two stripes, which accounts for that portion of the common name for the species.
The dragonfly in the first photo is a female Blue Corporal. She will remain that tan color for her entire life. If you look closely at the very tip of her abdomen (the “tail”) and compare it with the same area of the dragonfly in the second image, you can probably see some physiological differences. This is often the best way to tell the gender of a dragonfly.
The dragonfly in the second photo is a newly emerged male Blue Corporal, a stage known as teneral. During this stage, the wings are very clear and shiny and are very fragile. As the male matures, he will gradually turn bluish in color. His corporal stripes may turn light blue and eventually fade away.
You probably noted that the male Blue Corporal is perched flat on the ground—this is the most frequent perching position for this species. I was a little surprised that the female in the first photo was perching vertically a few inches above the ground, but I am not complaining, because it gave me a better chance to get a photo of her wings.
It is still a bit early in the season for dragonflies, so I was really happy to spot these two on Wednesday at Occoquan Bay National Wildlife Refuge. The refuge is still open and there were a number of other cars in the parking lot when I arrived. All of the other visitors, though, seemed to be either birding or walking in other areas of the refuge, leaving me the chance to muck about at the edge of a small pond all by myself, safely distanced from human contact.
© Michael Q. Powell. All rights reserved.
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Mike Powell 