The lovely mountain bluebird (Sialia arctcia) was designated the official state bird of Idaho in 1931 (also the state bird of Nevada). Idaho recognizes two bird symbols )the peregrine falcon is the official state raptor). The male Mountain Bluebird is a breathtaking brilliant sky blue, the female is gray with blue on wings and tail.

The mountain bluebird is a small thrush found on ranchland and other open areas of the American West. It prefers more open habitats than other bluebirds and can be found in colder habitats in winter. Only the female bluebird builds the nest. The male sometimes acts as if he is helping, but he either brings no nest material or he drops it on the way.

Mountain bluebirds hover over the ground and fly down to catch insects, and may also fly from a perch to catch them. Their main diet consists of insects and berries. They may forage in flocks in winter.

Source:

The State of Idaho - State Symbols: Idaho Gov Website
About Birds - Mountain Bluebird: Cornell Lab of Ornithology
Mountain Bluebird: Wikipedia.org

Links:

State Birds - 50 states List
National Bird