Tony LePrieur saw a flock of ten Migrating Mountain Bluebirds in the Weaselhead Nature Area in SW Calgary on April 1, 2018. All photos by Tony LePrieur.

Male Mountain Bluebird.

Six males together.

A female. Most of the earliest-arriving birds are males, eager to get on territory.

Mountain Bluebirds arrive back in the Calgary area every spring just about right on the equinox. The extended snowy and cold weather we are having this spring will make it tough on them. They eat mostly insects during the breeding season, but will also eat berries to survive the cold weather.

Mountain Bluebirds are a cavity-nesting species, and they are now often out-competed for nesting sites by non-native House Sparrows and European Starlings. In an effort to increase the nesting opportunities for Bluebirds, volunteers have erected hundreds of nest boxes in rural Alberta.

See the Mountain Bluebird Trails Conservation Society website.

You can see more of Tony LePrieur’s photos on his Flickr page.