A large duck of tropical South America. It is black and white, with a finely speckled head and neck; the male has a large fleshy knob above the bill.
It is black and white, with fine black speckles on the head and neck. The male has a large fleshy comb above the upper bill.
It uses grassy ponds and lakes, wetlands along large rivers, swamps, marshes, and floodplains.
An extinction-risk assessment has not been added yet.