Published by Paul Ivinskas
Tuesday, October 27, 2026

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Wildlife & plants · Birds

Mountain bluebird

A sky-blue bird of open country that winters on juniper berries when insects are scarce.

NPS describes the mountain bluebird as about 7 inches long. Males are sky blue; females are gray with blue tinges and a white belly. The birds live in open country with trees, prairies, sagebrush and above the alpine tree line.

They prefer to eat insects and berries. In winter, when other food is scarce, they turn to mistletoe, juniper and hackberry fruit. Mountain bluebirds can raise up to two broods a year.

The bird's open-country life makes a fence line or a sagebrush flat a better place to look than a forest. The western bluebird is a different species that the same NPS source describes separately, so compare range and setting as well as color.

How to recognize it

Males sky blue; females gray with blue tinges and a white belly.

Watching and staying safe

Watch fence lines and open flats from the road or trail; keep away from nest cavities.

Places the sources name

Examples from the sources, not a complete range or a sighting guide.

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