Adult male Western Bluebirds are bright blue on top and on the throat with an orange
breast and sides, a brownish patch on back, and a gray belly and
undertail coverts. Adult females have a duller blue body, wings, and
tail than the male, a gray throat, dull orange breast, and a gray belly
and undertail coverts. Immature Western Bluebirds have duller colors
than the adults, they also have spots on their chest and back. The bird that we saw below, in Rocky Mountain National Park, was an immature bird.
Western Bluebirds are sometimes confused with other bluebirds, however they can be
distinguished without difficulty. The Western Bluebird has a blue
(male) or gray (female) throat, the Eastern Bluebird has an orange throat, and the Mountain Bluebird lacks orange color anywhere on its body.
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