male; pretty sky-blue body (California, USA; 2007-01-13)

Mountain Bluebird
Sialia currucoides

Native Range: North America

Notes: inhabits open prairies and mountain areas with scattered trees, its sky-blue feathers often matching its blue-sky environs; often forms flocks in winter; somewhat longer-winged and longer-tailed than other bluebirds.

female; much grayer overall (California, USA; 2009-11-27)

female; ashy gray with merely tinges of blue (California, USA; 2007-01-13)

male (Utah, USA; 2013-05-06)

male perched on fencepost (Utah, USA; 2013-05-06)