Prevent pesky squirrels from eating your bird food with the Perky-Pet Squirrel-Be-Gone III Bird Feeder. This bird feeder provides an optimal feeding station for birds, without catering to those sneaky squirrels. It does so by utilizing a weight-activated perch that closes off under a squirrel’s weight, while your favorite birds can still access the seed just fine. Adjustable springs can be calibrated to accommodate different bird sizes