Birds: Anseriformes, young Mute Swans , Tundra Swan , Coscoroba Swan and Bewick's Swan , illustration
Birds: Anseriformes, from left: Mute Swan flying and on ground, Black Swan , Black-necked Swan, , illustration黑天鵝
Birds: Anseriformes, head of Liz - female Tundra Swan , Wildfowl and Wetlands Trust reserve, Slimbridge, England, , illustration
Birds: Anseriformes, Northern Shoveller , Aythya - diving duck , Tundra Swan , Northern Pintail , Common Duck Mullard , Common Teal , Eurasian Wigeon...
Birds: Anseriformes, head of Anthony - male Tundra Swan , Wildfowl and Wetlands Trust reserve, Slimbridge, England, , illustration