Facts About Bluebirds

There are three species of bluebirds: the Eastern Bluebird, Western Bluebird, and Mountain Bluebird, all native to North America.

Bluebirds belong to the thrush family, Turdidae, which also includes robins.

Bluebirds are cavity nesters, meaning they nest in tree holes or nest boxes rather than building open nests.

Bluebirds are generally monogamous during a breeding season, though pairs do not always stay together year after year and some females mate with more than one male.

Male bluebirds have brighter, more vivid blue plumage than females, which tend to look duller and grayer.

A bluebird's blue color isn't from blue pigment at all — it comes from the microscopic structure of the feathers scattering light, a phenomenon known as structural coloration.

Wild bluebirds can live up to about 10 years, though most survive only a few years due to predation, harsh winters, and other hazards.

Bluebirds are omnivores, eating mostly insects in warmer months and switching to berries and fruit in fall and winter.

Backyard bird lovers can attract bluebirds by offering mealworms, a favorite food, especially during nesting season.

Bluebirds are territorial and will defend their nesting area from other birds, including other bluebirds.

Many bluebird populations migrate south for the winter, though bluebirds in milder southern regions often stay put year-round.

Bluebirds have a soft, warbling song that many birdwatchers find especially pleasant.

Bluebirds appear widely in folklore and popular culture as a symbol of happiness, hope, and good luck.

Bluebird populations are sensitive to habitat loss and pesticide use, both of which can reduce their insect food supply and nesting sites.

The Eastern Bluebird is the official state bird of both Missouri and New York.

The Mountain Bluebird is the state bird of Idaho and Nevada.

Bluebirds don't excavate their own nest cavities; they rely on holes made by woodpeckers or naturally occurring tree cavities, and readily use human-built nest boxes.

By eating large numbers of insects, especially during breeding season, bluebirds help naturally control insect populations.

Bluebirds face predation from snakes, raccoons, cats, and other nest-raiding animals, which is why predator guards on nest boxes are recommended.

Bluebirds prefer open habitats like meadows, pastures, and golf courses with scattered trees or fence lines for perching.

Well-placed, properly maintained nest boxes can significantly increase the chances of attracting nesting bluebirds to a yard.

Bluebirds regularly bathe in shallow bird baths and other sources of standing water.

Bluebirds sometimes attack their own reflection in windows or mirrors, mistaking the image for a rival bird intruding on their territory.