Western Bluebird, Sialia mexicana. This bluebird is most similar to our Kansan visitor, the Eastern Bluebird. But, as the name suggests, this species is found more in the western areas of North America. Their breeding range is in the mountains of Colorado and the central-west, they winter along the Rio Grande and central California, and some spending year-round in central Mexico, California, and the south west of the States. Their diet consists mainly of berries and insects. A quick identification key to tell the Western species from the Eastern is that the Western has a blue belly instead of white, reddish on the mantle/back instead of plain blue, and the blue is darker than the Eastern’s. There are six recognized subspecies for the Western Bluebird, based on various phenotypical or genetic differences.