They're so much fun to watch.
You always hear them first, and instinctively duck down, as in what the heck is that :D ... they are fun to watch hover at a feeder. If you watch them closely you can sometimes follow them to a tree where they sit on the branches like a "normal" bird !
Yeah, they were rotating in a nearby tree today. Three birds were the rotation. One would chase another away from the feeder. Meanwhile the third dipped in for a drink. Entertaining they are! 8)