Quite widespread in South America and Africa, it behaves more like a swan or a goose than a typical duck. Found in freshwater marshes, lakes and rice fields. Usually in flocks, sometimes numbering in the hundreds. They feed at night and eat underwater tubers and seeds of aquatic plants, also molluscs, small aquatic animals and invertebrates. Clutches consist of 6 to 12 eggs, and both partners incubate the eggs for 28 to 30 days.