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 Sarkidiornis melanotos African comb duck in Forth Worth Zoo Knob billed duck Facts, Diet, Habitat & Pictures on Animalia.bio Sarkidiornis melanotos Monaco Nature Encyclopedia Knob Billed Duck in Uganda (Sarkidiornis melanotos) Uganda Birding Safaris & Tours The bird in the image is a knob billed duck (Sarkidiornis melanotos), also known as the comb duck. Nikon D500 + Sigma 150 600 mm #rickyrasaniaphotography #tholbirdsanctuary #nikon #sigma #birdphotography #winter #wildlifephotography #gujarat