Shelburne Bay was rich today. I was there from 3:55 to 4:45 pm. Partway through, the Snowy Owl showed up and sat on the edge of the ice to the north. Later it flew off to the east and landed on the ice at that end of the bay. In addition to the Canvasback and Redhead that Bruce McPherson mentioned, there was also a Ring-necked Duck swimming among approximately 120 Common Goldeneye.
The ducks stuck around for about 15 minutes after the Snowy Owl showed up and then they all rose up and flew east and disappeared in the horizon. I believe the Canvasback, Redhead and Ring-necked Duck joined them. Something must have spooked them, but aside from the owl, I did not see any other predators. Twenty-three Common Mergansers and a single Hooded Merganser were also present.
A Greater Black-backed Gull sitting afar on ice to the east, later flew up circling high above the owl and squawking alarm calls.
I did not notice the Gadwalls but they might have been there. There were no Bald Eagles.
172 Woodbury Road
Burlington, VT 05408