Kettle Moraine's Live Mealworm Feeder This highly original Woodpecker Feeder is terrific for feeding live mealworms to a variety of clinging, insectivorous birds that include the downy, hairy and pileated woodpecker as well as the eastern bluebird. The live mealworms are unable to escape the confines of the feeder, and can be purchased in pet shops that sell reptiles or by mail order.