Bird Seed Sunflower Hearts is waste free bird seed because there are no shells. Bird Seed Waste free 20 lb bag contains black oil sunflower Kernels (sunflower hearts). This "sunflower hearts only" recipe really brings the birds in! And with no shells there is nothing to pay for or pick up later. Get a good look at male and female cardinals, Goldfinches, Bluebirds, Woodpeckers of all sorts, Chickadees, Nuthatches, Blue jays, etc. Excellent value and treat for most all backyard wild birds. Perfect seed for people who want to feed birds from balconies and decks without the mess of leftover shells. Put in standard feeders and enjoy! Experience and see the difference!