Dragonfly patrolling

This dragonfly patrolled the goldfish pond today and I decided to try to get a shot. 

I'm not sure what the work is all about because he never stopped to take half a second rest, just speeding around like a maniac seeing something that I didn't see, and then after awhile gone.

Not easy to get him in focus, but this is my first flying dragonfly so I'm pleased!