Kettle Moraine's Live Mealworm Feeder This highly original Bluebird Feeder is terrific for feeding live mealworms to a variety of clinging, insectivorous birds that also include the downy, hairy and pileated woodpeckers. 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. The photograph on the left features a bluebird parent showing off the feeder to its brood of two fledgling juveniles.