Range. - Pacific coast from Lower California to British Columbia.

The Western Bluebird is as common and familiar in its range as the common Bluebird is in the east. It nests in similar locations and its eggs are scarcely distinguishable, although averaging a trifle darker in shade; size .80 x .60.

767a. Chestnut-Backed Bluebird. Sialia Mexicana Bairdi

Range. - Rocky Mountain region from Mexico to Wyoming. The nesting habits or eggs of this brighter colored bird do not differ from those of the last species.

767b. San Pedro Bluebird. Sialia Mexicana Anabelae

Range. - San Pedro Martir Mountains in Lower California. The eggs of this variety will not in all probability be any different from those of the preceding Bluebirds.