As spring approaches, wild birds start searching for nest materials. Give them a helping hand! The Audubon Society recommends natural materials and our nest ball provides FIVE types of all-natural materials for your backyard birds: shredded aspen, alpaca wool, coconut coir, thin sticks, and raffia. This great combination is sure to please the busy birds in your backyard! While it may be tempting to put out dyer lint, dryer lint is unsustainable in the rain, crumbling and leaving holes in an otherwise solid nest. Our natural nesting ball will be a favorite for your outdoor feathered friends! After you hang it, expect it to take a week or so as birds acclimate to it and realize the great materials it holds! Place it next to a feeder if you want to speed up the acclimation process. Ball is approximately 4.5″ in diameter (about the size of a grapefruit).