The African Comb Duck (Sarkidiornis melanotos) is a tropical wetland bird. It is also known as the Knob-Billed Duck.
The African Comb Duck has a white head with small dark spots, a white neck, and white underparts. Its upperparts are glossy, blue-black with blue-green iridescent feathers. The male is much larger than the female, and it has a large black knob on its beak.
It measures 56-76 centimetres (22-30 inches) tall, with a wingspan of 116-145 centimetres (46-57 inches).
The African Comb Duck is native to sub-Saharan Africa, Madagascar, southern China, and south Asia. It prefers freshwater wetlands, such as swamps and lakes.
It feeds on vegetation, and sometimes small fish, insects, and seeds.
It is usually seen in flocks of up to 100 individuals in the dry season.
The African Comb Duck nests in tree holes and in tall grass. The female lays 7-15 yellowish-white eggs.
Photographer: Martina Nicolls
Martina Nicolls: SIMILAR BUT DIFFERENT IN THE ANIMAL KINGDOM