Mountain Bluebird vs American Redstart

In short

The Mountain Bluebird and American Redstart are distinct in both appearance and behavior. The Mountain Bluebird is a thrush with a more uniform blue coloration, while the American Redstart is a warbler with striking black and orange or yellow plumage. They also differ in habitat preference, with the bluebird favoring open areas and the redstart preferring wooded habitats.

Identification tips

• Check size and shape: Mountain Bluebirds are larger and more robust than the smaller, more slender American Redstarts.
• Observe plumage: Look for the uniform blue of the Mountain Bluebird versus the contrasting black and orange or yellow of the American Redstart.
• Note behavior: Mountain Bluebirds are less active, often seen perched, while American Redstarts are more active, frequently fanning their tails.
• Consider habitat: Mountain Bluebirds are found in open areas, while American Redstarts prefer wooded environments.

Size

The Mountain Bluebird is generally larger and stockier compared to the smaller, more agile American Redstart.

Plumage

Mountain Bluebirds are a uniform sky-blue in males and grayish-blue in females, while American Redstarts have a striking black and orange pattern in adult males, and yellow-on-gray in females and immature males.

Behaviour

Mountain Bluebirds often perch openly and hunt from elevated vantage points, while American Redstarts are more active, flitting through foliage and displaying their tail to flush insects.

Habitat

Mountain Bluebirds prefer open areas such as grasslands and high-altitude meadows, whereas American Redstarts are found in a variety of wooded habitats, including forests and fencerows.

Voice

American Redstarts are vocally conspicuous with high-pitched phrases, especially during the breeding season, while Mountain Bluebirds have a more subdued song.