Keywords: Orsopapera-cigno e anatra 004.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 swimming with other species Domesticated ducks Anas platyrhynchos with other species |