This Heritage Farms “Absolute” metal, chew-resistant feeder has a powder-coated finish for durability. It has adjustable weight settings that allow you to select which birds you wish to feed. When the squirrel tries to steal food, the front panel closes…one frustrated squirrel! Use Black Oil Sunflower Seed, Safflower, or a good blend without millet because the small seeds tend to collect below the feeding opening. This feeder can draw both perching birds (chickadees, titmice) and ground feeding birds (cardinals, grosbeaks, doves and others) and clinging birds (woodpeckers, nuthatches and more)