In the warm summer months these feeders should be cleaned more often. Peanut Feeder Peanut feeders are built to hold peanuts for the peanut loving birds such as jays, nuthatches, and woodpeckers. These feeders are usually wire-mesh cylinders. Some birds prefer a different food source that you can provide. A mealworm feeder is essentially a small tray feeder that can hold mealworms.
Mealworms are a particular favorite of the bluebirds and robins.