Comprehensive Guide to selected species of:
Birds of the Boreal Forest « back to Guide
Mountain Bluebird Sialia currucoides
Family: Thrushes, Turdidae
Audio: Martyn Stewart, © Naturesound.org
An estimated 6% of the species' North American population breeds within the Boreal Forest.
Description 7" (18 cm). Male pure sky-blue above, paler blue below, with a white abdomen; female similar, but duller and grayer.
Habitat Breeds in high mountain meadows with scattered trees and bushes; in winter descends to lower elevations, where it occurs on plains and grasslands.
Nesting 5 or 6 pale blue eggs in a nest of grass and plant fibers built in a natural cavity or bird box.
Voice Soft warbling notes.
Range Breeds from southern Alaska, Mackenzie, and Manitoba south to western Nebraska, New Mexico, Arizona, and southern California. Winters from British Columbia and Montana south through western United States.
Discussion This species has longer wings and a more graceful, swallow-like flight than the Eastern Bluebird. Mountain Bluebirds usually travel in small parties. They frequently hover low over the ground and drop down to catch insects, or dart out from a branch, flycatcher fashion, and then return to another perch.