- Cygnus, genus Cygnus - a genus of Anatidae
--1 is a kind of bird genus
--1 is a member of Anatidae, family Anatidae
--1 has members:mute swan, Cygnus olor; whooper, whooper swan, Cygnus cygnus; tundra swan, Cygnus columbianus; trumpeter, trumpeter swan, Cygnus buccinator; black swan, Cygnus atratus