Since we moved to Central Virginia, we have had an ongoing struggle making our bird feeder more squirrel proof. We are on our third feeder and the squirrels have outwitted us every step of the way.
Jean Marie Oliviere sent me a link to the Ninja Warrior Squirrel Proof Bird Feeder. Mark Rober put a lot of thought and effort into building his squirrel proof feeder and documenting the success or lack thereof of his attempts.
If you enjoy watching cheeky tree rats engage in a battle of wits with humans, then you will love the four squirrels in this Building A Perfect Squirrel Proof Bird Feeder.