There are three species of swans in North America: - the mute swan, the trumpeter swan (found mostly in Canada and the northern tier of the U.S.) and the tundra swan (which nests in the Arctic and migrates south). All are large white swans but the trumpeter is North America’s largest waterfowl.
It is he heaviest living bird native to North America, it is also the largest extant species of waterfowl with a wingspan that may exceed 10 ft (3.0 m)