Berthoud, Colorado 5-17-10
Western Bluebird – Sialia mexicana
The male is deep blue with rusty-red breast and back; whitish belly.
The female is a brownish -gray with a wash of red on her breast and sides.
Removal of the dead trees, and the proliferation of non native cavity-nesters like starlings and house sparrows, have greatly reduced nest habitat for bluebirds.
The Bluebird Project, a joint effort between the Colorado Division of Wildlife and the Denver Audubon Society, offers nest boxes for the construction of bluebird “trails,” greatly increase the available nest cavities for all species of bluebirds in Colorado. In summer, Western Bluebirds inhabit foothills and lower mountains across the state, living year-round in southern Colorado.
This is my first sighting of this colorful bluebird.