This is a Mourning Warbler, as has already been pointed out. The bird is very bright (not muddy like 1st yr Connecticut), has a broken eyering, and structurally wrong for Connecticut
Size and structure are helpful, but in this case look at the lack of yellow lores and acute gular. Second and third photo are Neotrops. FWIW, Neotropic is the more common species in the valley
All are 4 year gulls so not Ring-billed. I'm assuming all are in the G-wing/Western complex, but there's no way to ID any with certainty from these photos