Sitta carolinensis. One of my favourite 'winter' birds. We have a few pairs around the neighbourhood year-round, however, in the Fall, more move south from their northerly breeding grounds or simply move into town to be around seed and nut feeders.
Not the greatest or clearest photos; just my usual snapping through a dirty window inside the house (where there isn't good light - sigh)
I really have to get a good camera and learn to take crisp photos! Well, someday. Everybody gets the gist (and jizz) of the bird and that I like these little mutts.