Keywords: Orsopapera-cigno e anatra 003.JPG Mute Swan Cygnus olor and domesticated Mallard Anas platyrhynchos Cigno reale Cygnus olor e Germano reale Anas platyrhynchos own Orso della campagna e Papera dello stagno 2009-02-28 Cygnus olor with other species Domesticated ducks |