The Bewick’s Tundra Swan (Cygnus bewickii) is a bird in the Anatidae family of swans. It is a smaller Eurasian waterfowl than the Mute Swan.
It is white with a yellow and black beak, a yellow eye-ring, and a rounded head. It has dark-grey legs.
The Bewick’s Tundra Swan can grow to 115-140 centimetres (45-55 inches) tall.
It lives in Europe and into southern Russia and China. It is a migratory bird, flying to warmer climates in winter in a V-formation flock.
The Mute Swan (Cygnus olor) is a Eurasian waterfowl that lives across Europe into southern Russia and China. It is called mute because it is not as vocal as other species of swans.
The Mute Swan is white with an orange or orange-yellow beak that is bordered with black. It has black legs.
Birds do not have teeth, but the swan has serrated edges that look like teeth. They are plates called lamellae. The lamellae are useful for sifting water for plants and algae, and also frogs, worms, snails and small fish.
It grows to 125-170 centimetres (49-67 inches) tall. It is the second largest waterfowl (the Trumpeter Swan is the largest), and it is one of the heaviest flying birds.
The Black Swan (Cygnus atratus) is native to Australia.
It is the only entirely black-coloured swan in the world. Only the tips of its flight feathers are white, which can only be seen when flying. Its bill (beak) is deep orange-red with white bands at the front.