Black Oil Sunflower Seed
Black oil sunflower seed is the most familiar and most popular type of birdseed, for good reason. With this one type of seed in your birdfeeders, you will attract dozens of bird species to your backyard. 50#.
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When compared to striped sunflower seeds, black oil seeds are meatier and have a higher oil content, giving birds more nutrition and calories in every bite. Black oil seeds also have thinner shells, making them easier for small birds to crack.