The Gardman Durable Steel Ball is a fantastic way to offer multiple ways to enjoy your backyard birds. Offer birds nesting material to make a cozy nest, fill your ball with peanuts or whole sunflower seed. Fill this spiral feeder with soft nesting material, and watch the birds extract bits to line their nests! The Gardman seed/peanut/nesting material ball is extremely durable and we highly recommend this feeder for folks who like multiple purpose ball feeders.