A diving duck of larger lakes and reservoirs, especially with fringing reeds. Male striking and unmistakable with large, rounded, rusty-orange head, long red bill, and black breast. Female rather drab but distinctive: dirty buff overall with pale cheeks, dark face, and rounded brown cap. In flight, both sexes show a thick white wing stripe and whitish underwings. Feeds mainly by dabbling and upending. A common feature of waterfowl collections in European town and city parks.