Bird seed, also known as bird feed, is the food that is given to birds in bird feeders. This essential snack for birds contains a variety of seeds such as sunflower seeds, millet, and thistle. If you are looking for synonyms for the word bird seed, there are several options you can choose from. Some alternatives to bird seed include bird food, bird feed, birdseed mix, bird treats, avian food, and wild bird seed. These synonyms all refer to the same thing and can be used interchangeably to describe the food given to birds. Feeding birds is an important part of backyard bird watching activities. Providing birds with a variety of food is important to attract different species to your backyard.