Huge white bird with a long elegant neck. North American “Whistling” Tundras have a mostly black bill, with a yellow spot near the eye; Eurasian “Bewick’s” have a more evenly divided black-and-yellow bill. Immatures dusky gray-brown with pink on bill. Easily confused with Whooper and Trumpeter Swans where their ranges overlap; see those species’ accounts. Breeds on ponds and tundra in far north. Winters in large flocks on fresh or saltwater. Forages in shallow, vegetated wetlands, reaching under the water for plants, and walks through corn stubble. Gives loud echoing bugles, often while in flight.