Cackling Goose "Richardson's" subspecies Branta hutchinsii hutchinsii Andrew Haydon Park, Ottawa, Ontario 2 December 2009 On one of the duck ponds at Andrew Haydon Park, lost somewhere in a sea of Canada geese, I located a lone cackling goose swimming lazily around.  Note the short, stubby bill and small head.

Cackling Goose "Richardson's" subspecies Branta hutchinsii hutchinsii Andrew Haydon Park, Ottawa, Ontario 2 December 2009 Here is a good comparison shot of a cackling goose (foreground) and a Canada goose (background).  Although the cackling goose is slightly closer to the camera than the Canada geese, it is still easy to see the difference in size between the two species.

Cackling Goose "Richardson's" subspecies Branta hutchinsii hutchinsii Andrew Haydon Park, Ottawa, Ontario 2 December 2009