Four-spot friend to all humankind

I was at my little garden plot today in the heat of the day and a constant companion was this four-spot dragonfly. Plus a couple of his friends. They were all darting around finding things in the air to eat, some of which were intent on eating bits of me. So I was glad to have the dragonflies there. And I didn't begrudge them their short rests.

I think this is a "four-spot dragonfly," so-named for the black mark on the edge of each of the four wings.