Swans commonly mate for life, though "divorce" does another time occur, particularly charted incubation failure. A total of eggs inside two clutch varies both inside & among swan coinage, often between Three–8 eggs.

Young swans come referred to as cygnets, from either a Latin word for swan, cygnus. A male & female adults come referred to as cob & pen, though these terms come little utilized present.

A Northern Hemisphere species of swan all use pure whiten plume, however a Southern Hemisphere species are a lot patterned by having various numbers of black. A Australian Black Swan (Cygnus atratus) is black complete except for a whiten quill feather in its wings, & the South American Black-necked Swan has, as its title suggests, a blacken neck; eventually, the Coscoroba Swan, as well from either southern South Us, has black tips to the primary feathers.

A legs of tons swans come dark blackish grey, except for the 2 South Our contries coinage, which keep close at hand pinkish legs. Bill colour varies like further; a triad far northern metal money develop melanize bills by having variable numbers of yellowness, & all the others varyingly patterned red & black. A Mute Swan & Black-necked Swan have a curious lump at a base of the bill on the upper mandibula.

Species of swan

Genus Cygnus Bechstein 1803 Whooper Swan, Cygnus cygnus breeds in Iceland and subarctic Europe and Asia, migrating to temperate Europe & Asia within wintertime. Trumpeter Swan, Cygnus buccinator is a North American species super similar to the Whooper Swan (& for instance treated as a race of it), which was hunted most to extinction but has since recovered: it is one of a heavily flying animals, at up to Seventeen kilograms (38 pounds). Whistling Swan, Cygnus columbianus is a comparatively little swan which breeds on the North American tundra, further northerly than more swans. It winters in the USA. '''Bewick's Swan', Cygnus bewickii'' is the Eurasian form which migrates from Arctic Russia to western Europe and eastern Asia (China, Japan) in winter. A reserves of the Royal Society for the Protection of Birds and of the Wildfowl and Wetlands Trust in Britain are important for Bewick's & Whooper Swans. These are typically considered the race of C. columbianus, creating a mintage Tundra Swan. Black Swan, Cygnus atratus of Australia, and introduced around New Zealand. A Black Swan is the official state emblem of Western Australia, and is likewise a symbol of the Sydney beachside suburb of Dee Why. New Zealand Swan, Cygnus atratus sumnerensis *Black-necked Swan, Cygnus melancoryphus of South America, formerly Sthenelides melanocorypha. Mute Swan, Cygnus olor, is a commons moderate Eurasian metal money, typically semi-domesticated; descendent of domestic flocks come naturalized in the United States & elsewhere.

Genus Coscoroba Reichenbach 1853 Coscoroba Swan, Coscoroba coscoroba, also of South America

Image:NPS Wildlife. Trumpeter Swan in Nest.jpg|Trumpeter Swan Image:flock-of-tundra-swans.jpg|Flock of Tundra Swans migrating touching Alma, WI, USA Image:Swans.jpg|Mute Swans Image:Black Swans.PNG|Black Swans