The Wild Delight Finch Sock Feeder is an all-in-one feed and feeder that contains only the finest premium grade Nyjer Seed*, an oil seed preferred by finches and other birds. Primary Wild Bird Species Attracted: American Goldfinches, Purple Finches, House Finches and Cassin’s Finches. Feeding Directions: Hang refillable Wild Delight Finch Sock Feeder from tree limb, hook or other hanging device. Finches will cling to the mesh sock and eat. Keep clean, fresh water available. Feed all year long.