Who doesn't like feeding the birds? These fun shaped bird feeders may be filled with shelled nuts such as unsalted peanuts and sunflower seeds or suet. This style of feeder attracts birds such as black capped chickadees, tufted titmouse, phoebes, every kind of woodpecker, blue jays, etc. that like to "cling" to the feeder to eat. The birds will peck the meat out and leave behind the empty shells. Dump out the shells, refill the feeder and start again.