Hi again. I’ve just looked more closely at juncos and phoebes, and have decided it was a dark-eyed junco. Why? Because the whole head was chocolate brown, not just the crown and forehead, but the chin and throat and cheeks as well. The descriptions and drawings don’t capture it, but the first photograph in iBird of a male dark-eyed junco in Oregon is exactly what my bird looked like except that the head was chocolate not black.