Roadrunner
This guy teased me by trying to stay just on the other side of some vegetation (often the dreaded Cholla Cactus) from me. I tracked him around for about five minutes in an attempt to get some better shots than this one.

I did succeed (see following image). But I paid dearly for the attempt. By the time I was done, I had three separate clumps of Cholla Cactus firmly embedded in my forhead, arm, and back.