Birds communicate with a fascinating array of instrumental sounds, and nearly all are made with their feathers or bills. The territorial drumming of a woodpecker - like this Black-backed Woodpecker - is one example. American Crows clatter their beaks to make rattling sounds. And the remarkable drumming of a Ruffed Grouse is produced by a rapid beating of its wings.

More info and transcript at BirdNote.org. 

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