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Rosybills do not moult into eclipse plumage and so keep their colour all year.
This pochard species is one of the most abundant of South American ducks.
The Rosy-billed Pochard, Rosybill, or Rosybill pochard is endemic to South America. It takes its name from the distinctive red bill on males. Females have a slate-coloured bill.
It is a highly social species that flocks even during the breeding season. They spend more time ashore than other pochards.
Though classified as a diving duck, this pochard feeds more like a dabbling duck. Its diet consists mainly of vegetable matter, seeds, grasses and sedges
They perform courtship displays in the spring before breeding which consist of conspicuous movements by both sexes including mock preenings, head bobbings and neck extensions. The pair bonds formed appear to be temporary. During the breeding season, there is a dramatic increase in both the colour and intensity of the fleshy bump on the male’s bill.
The female lays 8-12 eggs, often in the nests of other duck species to produce a larger clutch. The eggs are incubated for 27-29 days and the ducklings fledge after 7-10 weeks.