THE ANIMAL FILES

Mute swan

Cygnus olor

Mute is a comparison, not a vow of silence.

The mute swan’s name can distract from an animal that communicates in several ways. Adults and cygnets sound different, while wingbeats add a non-vocal sound in flight. Its long neck also connects anatomy with feeding, helping it reach submerged plants as well as use vegetation on land.[1]

Follow the evidence ↓
Mute swan
Image: Geni · Commons · CC BY-SA 4.0
Adult appearance
White plumage with an orange-and-black bill[1]
Young birds
Cygnets are often grey or buff[1]
Frequent food
Aquatic and terrestrial vegetation[1]

The white adult is not every age

Adults have white plumage and an orange bill with black details, but cygnets commonly have grey or buff down and a darker bill. Males are generally larger and have a larger bill knob than females.[1]

Quiet is not the same as silent

Mute swans are less vocal than some other swans, but produce grunts, whistles, snorts and hisses. Young birds use their own calls, and the wings create a conspicuous sound during flight.[1]

A neck that extends the feeding zone

The long neck helps reach submerged plants, while grazing also occurs on land. Small amounts of animal material can enter the diet, so a broad vegetation-based description is more useful than an absolute rule about every mouthful.[1]

A COMMON MIX-UP

Does mute mean the swan cannot make sounds?

No. The name reflects relative quietness compared with some other swans. The species has several vocal sounds, and its wings also produce a recognisable flight sound, so silence is not an anatomical or behavioural requirement.[1]

TRY A LITTLE REASONING

Why could a grey young bird belong with white adults?

Reveal the explanation

Plumage changes during growth. A cygnet’s down and bill colour differ from the mature appearance, so matching a young bird only against a white-adult photograph can hide the developmental connection between them.[1]

Sources & editorial notes

Adapted and translated from the cited Wikipedia revisions, with source-linked reasoning. Image credit and licence are listed separately above.

Adapted and translated from Wikipedia contributors; exact revisions are linked below. CC BY-SA 4.0

  1. Wikipedia contributors — Mute swan (fixed revision; adapted and translated)
  2. NCBI Taxonomy — Cygnus olor (identity and classification)

Last fact check:

One discovery leads to another

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