Our Satellite is designed to attract chickadees, nuthatches, titmice and finches. One at a time a bird land, picks out a fat sunflower seed and then dashes off. A lot of folks find this feeder great fun to watch, as birds return again and again, and set the Satellite spinning! The clear see-through top lets you check seed levels easily. Pigeon-proof and starling-proof. 6 inch diameter, complete with hanging chain.