005 Knob-billed Duck

The Knob-billed Duck (Sarkidionis melanotos), also called Comb Duck, is 56-76 cm long large duck. The adult male of the species is easily identifiable by its large black knob on the bill, white head freckled with dark spots, glossy blue-black upperparts, bluish and greenish iridescence on the lower arm feathers, pure white neck and underparts, and blackish legs and webbed feet. It is resident breeder in the tropical wetlands of Africa, Asia, and South America. Each female lays 7-15 yellowish-white eggs, but these birds do not build individual nests. Instead, several females lay their eggs in a common nest, which may contain about 50 eggs.