Northern Prairie Wildlife Research Center
Body: Very large bird, 11-20 pounds, 48-57 inches long. Adult entirely snow white; immature grayish white. Primaries whitish as opposed to black primaries on Snow Goose. Adult feet and bill black with yellow spot on bill in front of eye; immature, dull pinkish feet and bill, and bill lacks yellow spot. Voice: Loud, musical and varied wow-wow-ou and who-who. In Flight: Very long white neck and body. Black bill and feet evident.