Canada Goose with much smaller size than normal Southern Ontario Geese. When I first saw the Goose on the pond, under low light conditions, I thought it might be a large Mallard. The neck was very short for a Goose. Perhaps this is a Lesser Canada Goose? Note: in 3rd photo the Goose was alarmed at my presence and had neck at maximum extension. The 4th and 5th photos show the short neck as normally displayed by this Goose while on the water. On April 4th, three additional Geese accompanied the lone Goose seen two days earlier.
(Photographed April 2 & 4, 2012 on private property, southern Peterborough County, Ontario, Canada)