See photos. A problematic bird. Shows characteristics of a first-winter Red-Naped, a wash of red on the nape, barring on the back divided into two rows, near-adult head pattern (typically a first-winter Yellow-Bellied would still have a mostly brown head at this stage).The white supercilium seems a bit wide for Red-Naped, possibly a variable mark. Could not get a good profile or front angle shot.
See photo
See photo (immature male)
See photo