Audubon Friends Black Oil Sunflower Seed is a high-energy seed that attracts most seed-eating wild birds. Its shells are much easier to crack open than those of striped sunflowers, making it a favorite food among birds of all sizes. The seed is also rich in healthy fat and protein, making it a great choice for year-round bird feeding. Fill your bird feeder with black oil sunflower seeds to enjoy a colorful array of your favorite backyard birds.