Squirrel feeders have become increasingly popular in backyards and are in very high demand right now. There are a variety of squirrel feeder designs available including 'on the ground feeders' - which sit on the ground - or 'hanging feeders' - which hang from trees or posts. Many squirrel feeders have doors that squirrels have to open in order to access food. Obviously, this provides a great deal of amusement for spectators. The most popular type of squirrel food is corn. Corn can be scattered throughout the feeder for the squirrels to find. Other popular types of squirrel foods include squirrel logs and cakes, which can also be placed throughout the feeder. Squirrel feeders and squirrel foods are available online or through most retail garden or bird supply stores.