Wild Delight Finch Sock Feeder with Premium Nyjer Seed. For Feeding Wild Finches & Other Outdoor Pets. The Wild Delight Finch Sock Feeder contains only the finest premium grade Nyjer Seed, and oil seed preferred by Finches and other birds. It can be hung in various locations in your bird-watching area for year-round enjoyment. The sock can be refilled many times.