The different sizes, shapes and designs of bird feeders available online are limitless, but ultimately it is up to you to choose which is best suited to your yard. The most popular types of bird feeders are tube feeders, suet feeders and tray feeders. Tube feeders are cylindrical containers which have feeding holes placed vertically along the cylinder. This form of feeder can be hung from just about anywhere. Suet feeders are small hanging wire or mesh cages containing suet cakes. This form of feeder is especially attractive to woodpeckers. Tray feeders are usually made from wood or metal and can be hung from trees or porches. When hung close to the ground, tray feeders are known to attract morning doves and cardinals.