Kaytee Safflower Seed (5 lb): A single-ingredient wild bird food made of high-oil safflower seeds that are especially loved by Northern Cardinals and other backyard birds. Safflower’s bitter taste is naturally less appealing to squirrels, making it a smart choice for feeders in areas with squirrel problems. Use this nutritious seed alone or as part of a mix to attract colorful songbirds (cardinals, chickadees, nuthatches, grosbeaks, etc.) while helping to discourage pesky squirrels from raiding your bird feeder.