Widow Skimmer (Libellula luctuosa) belongs to the group of dragonflies known as king skimmers. The nymphs live in the water, molting and growing until they are ready to emerge from the water and then molting a final time to reveal their wings. Even though we don't have standing water on our property, the little marsh obviously was wet enough to give us a Widow Skimmer.
This is still a male youngster - adults have a steely blue body area, but juveniles are yellow with brown stripes.
I hope to see many more, as they normally prey on mosquitoes.