The Mountain Bluebird (Sialia currucoides) is known for its vibrant sky-blue plumage, especially in males, and is native to open country of western North America. They prefer habitats like meadows and prairies, often nesting in tree cavities. These insectivorous birds play a critical role in controlling insect populations.

Sialia currucoides, commonly known as the Mountain Bluebird, is native to North America. Its geographical distribution includes western and central Canada, the western United States, and parts of northern Mexico. The species is primarily found in regions such as the Rocky Mountains, the Great Basin, and the Sierra Nevada.

The Mountain Bluebird typically inhabits open country with sparse trees and shrubs. It thrives in environments such as grasslands, meadows, and open woodlands. The species can also be found in mountainous regions, at elevations ranging from lowlands to alpine zones. The climate in these areas is generally temperate, with cold winters and warm summers.

As an insectivorous bird, the Mountain Bluebird plays a crucial role in controlling insect populations. It often forages for insects in open fields and nests in cavities of trees or man-made structures. The species has adapted to a variety of open habitats, and its presence is often a sign of healthy grassland ecosystems. During migration, it may temporarily occupy different habitats, such as agricultural lands or suburban areas.