What is it all about, Rufus?

June 3, raining mistily.
I surprised a humming bird at the feeder, and in turn was surprised by it.

It flew about three metres from the feeder and proceeded to fly vigorously in a deep U shape pattern half a dozen times. I can hear the buzz of its wings. So when I came in I googled on the flight habits of humming birds. Unlike songbirds, humming birds only twitter, and have to rely on visual displays to be noticed. This trait is labelled as skydancing; a marvellous  sight.