Young birds have a speckled breast with no red and are mostly gray in appearance. A little blue may show in the wings. The bluebird song is 3 or 4 soft gurgling notes. Bluebirds feed mainly on insects but will eat fruits and berries, especially in winter. They will come to a bird feeder to eat suet and will readily use a birdbath.
Bluebirds are cavity nesters.
They use old woodpecker holes and natural cavities in trees and posts. They cannot resist a birdhouse if it is of the proper size and in the right location. The range of the Eastern Bluebird is east of the Rockies from southern Canada to the Gulf States. Their close cousins, the Western Bluebird and Mountain Bluebird, are not found east of the Mississippi River. Most Eastern Bluebirds migrate into the southern part of their range in winter.