This dragonfly was repeatedly tapping its rear end on the surface of the water. Haven't seen this before.
Sabine National Forest,
Sabine Co., Texas
17 May 2013
One of the few I can I.D...
Female Common Whitetail (Plathemis lydia), I think.
It looks very much as if this sturdy dragon has been dipped in white paint.
The male was hovering around the female who was flicking the water with her tail (depositing eggs?)