A Rufous Hummingbird beating his wings 80 times per second in hover. Hummingbird trivia: Hummingbirds are the only birds that can do this because they can rotate their "wrists" (shoulders?) in such a way that they can generate lift on both the up and down stroke of their wings. Other birds only generate lift on the downstroke.
Delta, B.C.
Sitting in a tree waiting for lunch to wander by.
