Mealworms
Mealworms are the larvae of the mealworm beetle, Tenebrio molitor, and they provide a high protein treat for many birds. Some people feed live mealworms while others prefer offering dried larvae (both forms are commercially available). Birds like chickadees, titmice, wrens, and nuthatches relish this food and mealworms are one of the only food items that reliably attract bluebirds. Offer mealworms on a flat tray or in a specialized mealworm feeder (available at many specialty bird feeding stores).