Mealworms are the larvae form of the darkling beetle, they have a worm-like shape and are attractive to many species of bird. Mealworms, which are incredibly nutritious (for birds), can be purchased living or dried. Birds seem to prefer living mealworms but will eat dried ones much the same, Eastern Bluebirds in particular like to munch on mealworms.

Birds that Eat Mealworms

American Robin     Black-Capped Chickadee     Carolina Wren     Downy Woodpecker     Eastern Bluebird     Hermit Thrush     Indigo Bunting     Northern Cardinal    Red-Bellied Woodpecker     Scarlet Tanager     White-Breasted Nuthatch