Size: L: 50-125 cm. Wt: 1250-9000 g. Males and females similar; males somewhat larger. Eleven races, based largely on size. Five of these may be seen on the Great Lakes. This species is not seasonally dimorphic.

Adult: brown upperparts; underparts vary from pale to dark; head and neck black, with white "chinstrap"; bill, legs and feet black. In some races, a white line separates black neck from brown breast.

Gosling: downy; greenish-brown to yellowish-brown on back, crown, and over eye; yellower below, and on edge of wings; bill black; feet greenish-brown.

Great Lakes Subspecies:
Giant Canada Goose (B. c. maxima)
Moffitt's Canada Goose (B. c. moffitti)
Interior Canada Goose (B. c. interior)
Lesser Canada Goose (B. c. parvipes)
Richardson's Canada Goose (B. c. hutchinsii)