The mute swan (Cygnus olor) is a species of swan in the waterfowl family Anatidae. It is native to much of Europe and Asia and is is an introduced species in North America, Australasia and southern Africa. The name "mute" derives from it being less vocal than other swan species. Measuring 125 to 170 cm (49 to 67 in) in length, this large swan is wholly white in plumage with an orange bill bordered with black. It is recognisable by its pronounced knob atop the bill, which is larger in males. Photograph: Geni
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