Mating Dragonflies

Talking to ~sumajarong reminded me that I still have a couple of ok shots from last summer in my "to be submitted" folder - like this one. I was really happy when I finally managed to capture a pair of mating dragonflies. Unlike damselflies, they usually fly around while mating and hardly ever sit down, which makes the whole thing a bit trickier. No idea which species these are, any guesses?

Edit: Submitted a cropped version. Not because I think 504 KB too large but because so much background really isn't necessary.