The largest of the North American native waterfowl and one of our heaviest flying birds, the Trumpeter Swan is large and white. It holds its long neck straight up, often with a kink at the base. The bill is black, and there is no coloration in front of the eyes. The juvenile is dusky-gray, with a mottled dark-and-light bill that is black at the base. The juvenile plumage persists until at least spring migration, which helps distinguish the Trumpeter Swan from the Tundra Swan.