Knob billed duck (Sarkidiornis melanotos) in flight. From Sub Saharan Africa, Madagascar, and Indochina. : r AIDKE Knob billed duck Facts, Diet, Habitat & Pictures on Animalia.bio Knob Billed Duck Or African Comb Duck Or Sarkidiornis Melanotos Closeup With Reflection In Water Or Wetland During Winter Migration At Keoladeo National Park Bharatpur Rajasthan India Asia Stock Photo Download Sarkidiornis melanotos (Comb duck, Knob billed duck) The knob billed duck (Sarkidiornis melanotos) aka African comb duck, is found in tropical wetlands in Sub Saharan Africa, Madagascar and the Indian Subcontinent from northern India to Laos and extreme southern China. Male South American Comb Duck (Sarkidiornis melanotos sylvicola) Found in continental South America south to the Paraguay River region in eastern Paraguay, southeastern Brazil and the extreme northeast of Argentina. Stock