Have you ever walked in the woods and heard a mysterious thumping sound, like someone trying to start an old engine that won’t quite turn over? You probably heard the unique behavior of a ruffed grouse drumming! Starting around this time of year, male ruffed grouse will jump up on a log, stump or rock and drum. They trap air between their wings and bodies, flapping in faster and faster succession, creating a vacuum of air that creates the characteristic thumping noise. Males use this behavior to

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