Roamwild PestOff Squirrel Proof Bird Feeder Nyjer/Thistle Finch Seed Version Not just a 100% squirrel proof bird feeder, also red squirrel proof, chipmunk proof bird feeder and large bird proof. Large birds & pests cannot feed either so it SAVES you money! The PestOff has INDIVIDUALLY spring loaded perches that never need calibrating and only let songbirds feed not pests, unlike other spring loaded feeder designs that need constant re-calibration to work effectively. Large capacity of 1.11 Quarts (2.5lbs) so no need for constant refilling. Ideal for feeding thistle / nyjer seed. Woodpecker friendly. NO more seed clogging, the built in rain guard above the seed ports keeps the seed dry to prevent clogging. Cardinal & Woodpecker friendly. Very easy to fill, simply open the lid, no need to take the whole feeder apart to fill. The PestOff simply 'clicks' apart for easy cleaning, no nuts and bolts to remove and replace. Seed container is made from thick UV stable Polycarbonate. NO calibration required, pest proof straight out of the box. It has been tested & it Works! Hassle Free Warranty.