bird genus - a genus of birds

Anatidae, family Anatidae - swimming birds having heavy short-legged bodies and bills with a horny tip: swans; geese; ducks

Cygnus olor, mute swan - soundless Eurasian swan; commonly domesticated

Cygnus cygnus, whooper swan, whooper - common Old World swan noted for its whooping call

Cygnus columbianus, tundra swan - swan that nests in tundra regions of the New and Old Worlds

Cygnus buccinator, trumpeter swan, trumpeter - large pure white wild swan of western North America having a sonorous cry

black swan, Cygnus atratus - large Australian swan having black plumage and a red bill