These Birds Tap Dance So Fast It's Invisible To The Naked Eye
After analyzing footage from 16 of the songbirds, the researchers discovered that both males and females rapidly tap their feet during courtship displays, step-dancing so quickly that it was invisible to the scientists’ eyes. For each bobbing motion, the bird would hop and stamp its feet repeatedly, which presumably produces vibrations responsible for the rhythmic sounds. They also found that if the birds were on the same perch, they would ramp up the dance and go full steam.