This is a female American Redstart, Jonathan. The yellow on the upper and under tail feathers is a big clue, along with the faint yellow wingbar.
This bird has a dark head and even darker cap, where female American Redstart is usually an even soft gray. I think this is a first spring male rather than a female. If you saw it singing, that would certainly clinch it.
Looks best for a first Spring Male to me too.
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