National Geographic : 1957 Dec
(c iNational Ueographie society 818 Canada Geese, Sketched from a Blind, Find Winter Haven in a Maryland Waterfowl Refuge Snowy cheek patches above a black-stocking neck mark the continent's most widely distributed wild goose. Ten subspecies, ranging from arctic tundras to Mexican lagoons, vary from the size of a mallard to that of a swan. One, now thought extinct, grew to 18 pounds. These birds average about 10 pounds. Strong family ties keep geese and goslings together for nearly a year; pairs are believed to mate for life. Canada goose fossils have been unearthed in Ice Age deposits. By 1676 a few birds had been sent from North America to England, where large flocks now range wild. Other transplanted birds thrive in New Zealand.