A grey duck with a white wing patch, it lives around Patagonian lakes and rivers, with different head and bill colors by sex
The body is grey with a conspicuous white wing speculum. Males have a pale grey head and neck with a bright yellow bill, while females have a darker grey-brown head and a yellow-grey bill
It prefers open shores of mountain lakes and lagoons and dives for mollusks and crustaceans. It moves by swimming or diving, and the Argentine account says it rarely flies
An extinction-risk assessment has not been added yet.