I suspect it's a robin, but so young the markings aren't apparent yet. It wasn't at all scared, which is characteristic of robins. They are very brave little birds.
when up north I think last spring I found a robin's nest underneath the box of a rail car with a few young in it. when I poked my head underneath to look at them and take pictures, they just looked at me a little and then went back to sleep . of course it was a bit warm and i'm not too fearsome... but they weren't too bothered by my being there
He's all grown up now, and amazingly friendly (I suspect it's the same one, but I will never be 100% sure). Shortly before Xmas he started following me indoors in the mornings, and now comes in most days to ask for his breakfast. So much courage definitely deserves a reward!
Today he brought a girlfriend with him.
Here he is on top of my freezer, & waiting to be fed...