Black Necked Swan

The Black-necked Swan (Cygnus melancoryphus) is the largest waterfowl native to South America. Males are 115–140 cm (45–55 in) and 4.5-6.7 kg (10-14.8 lbs); females are 102–124 cm (40–49 in) and 3.5-4.4 kg (7.7–9.7 lbs). The wingspan is about 177 cm (70 in). The body plumage is white with a black neck, head and greyish bill. It has a red knob near the base of the bill and white stripe behind eye. The sexes are similar, with the female slightly smaller. The cygnet has a light grey plumage with black bill and feet.