When insects are not available, such as in the winter, they will feast upon fruit. Bluebirds have been known to eat from feeders that offer mealworms and raisins. Bluebirds also participate in courtship feeding during breeding season. The eastern bluebird is found east of the Rockies, including into Canada and Mexico. Bluebirds require semi-open land with short grasses and gardens that are surrounded by woodlands.
Bluebirds have a territory range that is anywhere between two to twenty-five acres.
Bluebird pairs will not usually nest within three hundred feet of another bluebird pair. In the spring they return to their previous breeding territories. Year old bluebirds will breed near the area that they were hatched the previous year. The male will announce his territory with song from perches in the area of the territory. Both sexes will defend their territory from other intruding bluebirds but will only defend against the same sex.