Mute swan  (Cygnus olor)

Learn about the scientific name of this species and how it fits into the tree of life at Nature Navigator.

Description

The mute swan is Britain's largest bird (3), and one of the heaviest flying birds in the world (5); adults can weigh over 15 kg (3). The combination of their large size, very long neck, white plumage and orange-red bill with a black knob towards the top of the bill makes them easily to recognise (2). Males (cobs) and females (pens) are similar in appearance, although males are slightly larger and have a more prominent knob on the bill (5). Juveniles are greyish-brown with a grey bill, which lacks the knob seen in adults (2). Contrary to the name, the mute swan produces a range of vocalisations, including a rumbling 'heeorr', and an aggressive hissing noise when threatened (2). The wings make a loud 'clanking' in flight (6).

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