The Zoo of Tranquillity: The Woodpecker

This was so fiddly and the result is kind of disappointing. The mechanism makes the tree move back and forth, which in turn causes the woodpecker to move. The idea is that this creates the illusion that the woodpecker's motion is shaking the tree. Unfortunately, it's quite difficult to build up the right rhythm to make this convincing. It mainly looks as though the tree is moving and the woodpecker is hanging on for dear life.