Early this afternoon I believe that I observed a male Barrow's goldeneye in a large raft of waterfowl that I observed from the boat launch under the Champlain bridge.  As I scoped the assemblage looking for a canvasback (which I did not find) this individual with dark black back and brilliant contrasting white spots jumped out at me, clearly different from the neighboring common goldeneyes.

Good luck, good birding
Pat Demko
Bolton Landing