This is a game similar to Simon Says - don't flap your wings at the wrong time!
One player is leader. He/she and all the others flap their arms like birds. He/she calls out names of something with feathers. If a player flaps his wings on a calling that doesn't have feathers he/she's out. The leader flaps his wings on almost all things to confuse the group and calls as rapidly as possible. "Eagles have feathers, roosters have feathers, babies have feathers, etc."