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Western Bluebird

Merlebleu de l'Ouest

Birds of North America

Sialia mexicana




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Species: The Western Bluebird (Sialia mexicana) prefers a warmer habitat, than the other bluebird species. Seen west of the Rocky Mountains, and south into the Sierra Mountains. Similar to other types of bluebirds, there is a noticeable decline in their numbers. The suspected reason for this, is the loss of old growth trees with cavities, and competition to other cavities nesting birds. As such, the aid of nesting boxes have help with their numbers.

Distinctions: The male has an dark blue back, head, wings and tail, with a rusty red breast, flanks and shoulder stripes with an off white belly. The female has similar colours, except with a greyer tone. The juvenile, similar to the juvenile of the Eastern Bluebird, has a browner body with white spots, blue wings and tail feathers.

Voice: Similar to other bluebirds, a low warbling song, separate calls notes in flight, quiet on most occasions.

Nesting: Three to six pale blue eggs, two broods per year. These birds nest in tree cavities, holes in fence post and bird houses. Prefers sparsely treed fields, meadows, and open forests. Usually, it perches on a lower limbs of a tree or fence post, where it is able to pounce on unsuspecting insects or grubs on the ground.

Birds of North America
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B L W W W Family Latin Name
7" 17.8cm 13.5" 34.3cm 1.0 oz 28.3g Turdidae Sialia mexicana

  • Summer
  • Year Around
  • Winter
Red-tailed

Distribution: Seen in the warmer regions of Southern British Columbia. South through mostly the Pacific coast States into California, east of the Sierra Mountain Range, to Colorado, and south into Western Texas. Is a member of the thrush family, and a common bluebird seen in Mexico.

Classic Collection of North American Birds

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