After about an hour of going over numerous recordings, the best match I can
come up with was a Yellow-throated Warbler (no, NOT a C. Yellowthroat).
Thayer's recording was closer than Cornell's. We had one overwinter a couple
miles away in Ausable Point two winters ago, so they aren't unheard of (no
pun intended) in this area. Who knows...
Port Kent, NY