After searching diligently for the last few weeks, today yesterday I finally spotted a Fine-lined Emerald dragonfly (Somatochlora filosa) at Occoquan Bay National Wildlife Refuge. In the past this species has appeared on the scene in early September and is quite uncommon in my area.
As you can see from the photos, Fine-lined Emeralds like to hang vertically when they are perched, unlike many of the familiar dragonflies that I see throughout the summer that perch horizontally. When I spotted this dragonfly initially, it was flying back and forth at about knee-height and I immediately suspected that it was my target species. I have been watching dragonflies for a number of years and can identify some species (or at least make a good basis) on the basis of their flight profile.
I first spotted this species in 2017 at this refuge and have searched for them every year since then. The last few years it has grown increasingly hard to find Fine-lined Emeralds, so I was really happy yesterday to see this one.
This was actually my second encounter of the day with the species. A bit earlier, I observed one flying, but lost it in the vegetation while tracking it. This one might possibly be the same dragonfly, though it was far enough away that it could be a second one. Later in the day in another part of the refuge I caught a glimpse of another one as it zoomed by me. I chased after it, but came up empty-handed.
I will probably return to the wildlife refuge early next week to see if I can find another Fine-lined Emerald or perhaps I will find a Blue-faced Meadowhawk or an Autumn Meadowhawk, two other autumn dragonfly species.
© Michael Q. Powell. All rights reserved.
Mike Powell 
Leave a comment