Family Thrushes (Turdidae)

Least Concern

Mountain Bluebird (Sialia currucoides)


French: Merlebleu azuré German: Berghüttensänger Spanish: Azulejo claro

Motacilla s. Sylvia Currucoides


, 1798,

“Virginien” = western North America


Name arctica is a synonym. Occasionally hybridizes with S. sialis. Monotypic.


C & E Alaska, W & C Canada and W USA; non-breeding S to SW & SC USA and W & C Mexico.

Descriptive notes

16·5–20 cm; 27–33 g. Male is slightly glossy bright cobalt-blue above, vaguely darker on ear-coverts and lores; tips of flight-feathers and of tail... read more


Song, from several perches within territory, often near nest-cavity and sometimes in flight, of two... read more


Breeds in tree-line-tundra ecotones, prairie-forest ecotones, savannas, grassland with groves of... read more

Food and feeding

Mainly arthropods in spring and summer; mainly small fruits and some seeds in autumn and winter. Invertebrate food in one all-year study... read more


Apr to early Sept, mean date for first-clutch completion mid-May in C of range; two broods attempted by c. 50% of pairs; nest failure may... read more


Most migratory of genus, but majority of population winters at lower elevations within breeding... read more

Status and conservation

Not globally threatened. Low but stable numbers across most of extensive range; irregularly common to fairly common in winter in Mexico. W spread of logging and grazing... read more

Recommended citation

Collar, N. (2020). Mountain Bluebird (Sialia currucoides). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from on 17 February 2020).