Common Whitetail Dragonfly
A Blue-ringed Dancer dragonfly, Argia sedula. (I’m pretty sure that’s what it is, even though the dragonfly guide I have doesn’t list it.) Photo taken yesterday, just before the cold front came through.
It looks similar to the Common Blue Damselfly from Yorkshire, England or the Variable Sprite, Argiocnemis rubescens rubeola from Thailand.