Mountain Bluebird

Sialia currucoides




Thrushes (Turdidae)

Code 4


Code 6



Egg Color:

Pale blue to blue white

Number of Eggs:

5 - 6

Incubation Days:

13 - 14

Egg Incubator:


Nest Location:

In tree cavity or abandoned nest.

Nest Material:

Lined with plant material., Grasses





Mountain Bluebird: Small thrush with sky-blue back, head, and wings. Throat and breast are paler blue, and belly and undertail coverts are white. Female is gray overall with blue wings, rump and tail, and has faint eye-ring. Juvenile resembles female but has spotted underparts.

Range and Habitat

Mountain Bluebird: Breeds in southern Alaska and Yukon, east to Manitoba and south to western Nebraska, New Mexico, Arizona, and southern California. Spends winters in Oregon and Colorado south through western U.S. Inhabits high mountain meadows with scattered trees and bushes; in winter, descends to lower elevations in plains and grasslands.

Breeding and Nesting

Mountain Bluebird: Five to six pale blue to blue white eggs are laid in a nest made of grass and plant fibers and built in a natural cavity or box. Incubation ranges from 13 to 14 days and is carried out by the female.

Foraging and Feeding

Mountain Bluebird: Eats insects, fruits, and berries. Forages from a perch, dropping to catch prey on the ground; also hovers above prey before capture.

Readily Eats

Raisins, Currants, Nut Meal


Mountain Bluebird: Song consists of a soft, melodious warble "tru-lee." Call is a "phew."

Similar Species

Mountain Bluebird: Eastern and Western bluebirds have red on underparts. Townsend's Solitaire has buff-brown wing patches.


Belly, undertail coverts, chest, flanks, and foreneck.

Undertail covertsX
Small feathers that cover the areas where the retrices (tail feathers) attach to the rump.
The ventral part of the bird, or the area between the flanks on each side and the crissum and breast. Flight muscles are located between the belly and the breast.
The upper front part of a bird.
The area between the uppertail coverts and the back of the bird.
Parts of a Standing bird X
Head Feathers and Markings X
Parts of a Flying bird X