Nature's Own Black Oil Sunflower Seed is one of the most popular seeds among wild birds. Its shell is tender and easy to open, and the sunflower heart is rich in healthy fat and protein providing essential energy for birds. Offer this high-energy seed all year to attract a wide variety of your favorite feathered friends such as cardinals, finches, and nuthatches. Suitable for a variety of feeder types such as tube feeders, hopper feeders, and platform feeders.