Crested pigeons sound the alarm with their wings

Specialized feathers produce high and low tones when the birds flee in a hurry

crested pigeon flying

BEAT IT  Crested pigeons coordinate their escapes with wing sounds rather than vocal calls. The sound production is tied to wing movement during takeoff, and thus a highly reliable alarm signal, researchers say.

Geoffrey Dabb

Crested pigeons communicate without even opening their beaks.