I don't know if there are any winter records of semi-plover from
Vermont, but Massachusetts had 8 December records up until 1993 (Veit
and Petersen). I don't know how many have been seen since then.
Hector Galbraith PhD
Galbraith Environmental Sciences LLC
837 Camp Arden Rd., Dummerston, VT05301
802 258 4836 (phone)