Naming
*Western Bluebird⤷ Eastern Bluebird
Behavior
Their call is a thin 'few'; while their song is warbled high 'chur chur.'
Reproduction
Their breeding habitat is open country across western North America, including mountain areas, as far north as Alaska. They nest in pre-existing cavities or in nest boxes. In remote areas, these birds are less affected by competition for natural nesting locations than other bluebirds. Mountain Bluebirds are a monogamous breed. The male can be seen singing from bare branches. The singing takes place right at dawn, just when the sun rises. Females usually build the nests themselves. Eggs are pale blue and unmarked, sometimes white. The clutch size is four or five eggs. Young are naked and helpless at hatching and may have some down. Incubation normally last 14 days and the young will take about 21 days before they leave the nest. Both males and females fiercely protect the nest.
Food
These birds hover over the ground and fly down to catch insects, also flying from a perch to catch them. They mainly eat insects and berries. They may forage in flocks in winter, when they mainly eat grasshoppers. Mountain Bluebirds will come to a platform feeder with live meal worms, berries, or peanuts.References:
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