Hi,
Great pictures, Frank! I can't get clear open shots of my guys cuz of the foliage and such, but do watch those maneuvers almost every day.
And Rufus, my resident male rufous hummingbird, is just like Don's. He'll take on the bigger Anna's birds two at a time, and even tries to chase me away from the feeder when I've forgotten to fill it at night when he's asleep. He doesn't like me interrupting his morning routine, I guess!
Rick C