Cygnus

• tundra swan

  Swan that nests in tundra regions of the New and Old Worlds.

• mute swan

  Soundless Eurasian swan; commonly domesticated.

• whooper

  Common Old World swan noted for its whooping call.

• trumpeter

  Large pure white wild swan of western North America having a sonorous cry.

• black swan

  Large Australian swan having black plumage and a red bill.

Also contains

• swan's down

  Down of the swan.

• cygnet

  A young swan.

• coscoroba

  Large white South American bird intermediate in some respects between ducks and swans.

• cob

  Adult male swan.

• pen

  Female swan.