The Knob billed Duck (Sarkidiornis melanotos) is hard to missthe males grow a huge black knob on top of their bill during the breeding season. Found across Africa and South Asia, these ducks 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 Image Sarkidiornis melanotos (Knob billed Duck) BioLib.cz Comb Duck (Sarkidiornis sylvicola) Birds of Bolivia Knob billed Duck (Sarkidiornis Melanotos) Commonly Found in Sub Saharan Africa and South Asia Stock Image Image of biodiversity, behavior: 326401309