Quote:Hairy Woodpeckers are larger than Downy Woodpeckers and have a larger bill that is almost as long as the entire head. Hairy Woodpeckers have a longer and more distinct black mark on the shoulder, and in most populations, completely white outer tail feathers. A Downy Woodpecker's “whinny” call descends in pitch toward the end, unlike the Hairy Woodpecker's call.