Here's the evidence...it really works. This little fellow, err...lady...isn't going to get any of those sunflower seeds unless they are dropped by the birds. Finally, a feeder that really is squirrel resistant! (The bottom drops with the weight of the animal and closes off the ports) This one happens to be called the Squirrel Buster Plus, but it's sold under several names by various feeder merchants including Wild Birds Unlimited and Duncraft.