I think this is a female Oregon Junco, a variety of the Dark Eyed Junco. They show up here for the winter every year. Always good to see them.
It’s been hard to get good shots so far due to bad light conditions and dirty windows. I am helpless in the face of both of these challenges.
Possibly a male. Or not. Possibly the same bird in a different position. Who can know for sure?
The main way to tell the difference, from what I gather, is their stance. The male tends to hold itself less upright than the female.