What Bird Is That Forum

I'm guessing this is a mountain bluebird but I've never seen one with a breast like this so just making sure it's not something different. Avon, CO. Thanks!

The spotted breast is common for many juveniles, including bluebirds. I'm not confident in identifying the species beyond juvenile Bluebird, so wait for more input.

I hat to say this but from this photo I don't know of it's Mountain or Western. Maybe someone with more hands on experience can say

It appears to have spots on its back, which is a trait of the Western Bluebird.