Birdology: Adventures with a Pack of Hens, a Peck of Pigeons, Cantankerous Crows, Fierce Falcons, Hip Hop Parrots, Baby Hummingbirds, and One Murderously Big Living Dinosaur

by Sy Montgomery

Caught in the feathers, air gives birds their warmth and their flight; in hummingbirds, air even gives them their color. Their jewel-like radiance—emerald, ruby, amethyst—comes not from pigment, as in most birds’ feathers, but from air.