SHANNON TOMPKINS: CHRONICLE WHITE ON RED: Waterfowl biologists are not certain why some adult hen redhead ducks, such as the one between the normally colored drake (top) and hen (bottom) sometimes ...

The White-faced Whistling duck (Dendrocygna viduata) is found in freshwater marshes from Costa Rica to northern Argentina and Uruguay. With a black head and crown and white cheek and forehead, the ...

One of the largest duck species, the white-winged duck measures between 66 and 81 centimeters from head to tail and has a wingspan of 116-153 cm. Adult males weigh between 2.94 and 3.9 kilograms ...