Found to breed extensively in south America and the Falkland Islands. It is a dabbling duck found in shallow coastal areas feeding on a diet of invertebrates and marine algae. The sexes are similar. Nests are constructed from vegetation and lined with breast feathers. Clutches of 5 to 7 eggs are laid from August through until April, with two broods being common. Eggs hatch about a month after laying, and chicks are led from the nest to feed themselves shortly afterwards. Fledging occurs at around 10 weeks of age.