Author 'Boucher Marc dit de Meilh' (Id 145426 ) : Mute Swan in its nest, photographed reedbeds of Lake Bourget. Tuberculata because this swan has a growth on its beak between the beak and skull. That is why we gave him the name tuberculata, because of this 'potato' on the nose. The Mute Swan Cygnus or mute (Cygnus olor) is a species of bird in the family Anatidae. Marc Boucher said Meilhan.