Believe it or not, Yale researchers have discovered that hummingbirds’ “hums” are actually produced by vibrations in the birds’ tail feathers.

Hummingbird mystery solved at Yale

September 21, 2011
Two Yale scientists have discovered how hummingbirds hum. In collaboration with Yale biology professor Richard Prum and University of California, Berkeley professor Damian Elias, biology post-doctoral associate Chris Clark has determined that the sound produced by diving hummingbirds in mating rituals is caused by tail feather vibrations. Researchers in the field praised the project for »