Anas

trivial name latin name
Northern Pintail Anas acuta
White-cheeked pintail Anas bahamensis
Common Teal Anas crecca
Cinnamon Teal Anas cyanoptera
Falcated Duck Anas falcata
Andean Tea Anas flavirostris
Grey Teal Anas gracilis
Hottentot Teal Anas hottentota
Meller's Duck Anas melleri
Mallard Anas platyrhynchos
Spot-billed Duck Anas poecilorhyncha
Garganey Anas querquedula
Eastern Spot-billed Duck Anas zonorhyncha

comparison of wing and tail configuration