A Ruby-throated Hummingbird's Day

I guess if I needed any evidence of the speed and vigilance of this resident male ruby-throat it would be that I can’t get a clear image of him!
This becomes all the more frustrating when I've been able to capture satisfying images of some of the juvenile and female visitors that have managed to sneak a drink from the feeder.
But the male has no time to linger. He is ever vigilant, moving up and down, scanning between drinks.
Yesterday morning while he was peacefully preening high on his perch, another male challenged him. I caught this other-worldly image below as the intruder flashed him a second time before departing.
Our scrappy king never even left his perch.