If you've ever been in the woods and heard a drumming sound that builds into a crescendo before tailing off, it was very likely the mating ritual of a male Ruffed Grouse. Long thought to be the result of wings beating together, or striking the bird's breast, we now know that the sound is actually produced by the wings striking nothing but air (see link in comments for a demonstration). But drumming isn't the only seduction trick up the male Ruffed Grouse's sleeve. Like other ground birds, he wil