National Audubon Society Supreme Blend Bird Seed, (40 lbs) Supreme Blend attracts a wider variety of songbirds to your feeders including cardinals, chickadees, woodpeckers, finches, titmice, and nuthatches. Formulated, tested, and approved by the National Audubon Society as a premium bird food blend 51% black oil sunflower seeds plus 5 additional preferred ingredients For year round feeding in most tube, hopper, and platform bird feeders Made in the USA  SQF Level 2 Certified Manufacturer Supreme blend bird seed mix Wild bird food blend including oil sunflower, striped sunflower, safflower, peanut pieces, white millet, and cracked corn Reduces waste from feeder Higher quality ingredients provides added energy to birds Contains no fillers or adders