mute swan(n = noun.animal) cygnus olor - soundless Eurasian swan; commonly domesticated;
is a kind of swan
is a member of cygnus, genus cygnus

bewick's swan, black swan, deaf mute, mute, swan, swan dive, swan orchid, swan river daisy, swan river everlasting, swan song, trumpeter swan, tundra swan, whistling swan, whooper swan