Location: Recently relocated to the shores of Rhode Island - East Bay!
Posts: 505
Looks like a Sharp Shinned. Had them in the back yard as well, and just looked it up. Could be Cooper's, which look very similar, but bigger. The Sharp shinned is more common I believe. Let the more experienced weigh in though.
I agree, 80% SS. Hard ID but the barrel chest makes me think it's a SS.
Tail tip in the pic is hard to ID wether it is square or rounded like the Cooper.