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.
Blue-ringed Dancer
It looks similar to the Common Blue Damselfly from Yorkshire, England or the Variable Sprite, Argiocnemis rubescens rubeola from Thailand.
It's a long story ... 