What’s a Beak Made Of?

Bird beaks, or bills, come in many shapes and sizes. And birds use them for just about everything: to collect food, preen, fight, court, and more. In order for a bird to fly, its beak must weigh as little as possible. Beaks are covered with a sheath of a tough material called keratin, which grows continuously because a beak wears down with use.

This episode brought to you by the Bobolink Foundation.

More info and transcript at BirdNote.org.

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