Knob billed Duck, Sarkidiornis melanotos. A Knob billed Duck shows off its iridescent feathers as it flies past. This species is found along the tropical sub tropical wetlands and waterways of Sub Saharan Africa and the island Knob billed Duck Holmen Birding Safaris Knob billed Duck Sarkidiornis melanotos Knob billed Duck (Sarkidiornis Melanotos) Commonly Found in Sub Saharan Africa and South Asia Stock Image Image of biodiversity, behavior: 326401309 Knob billed Duck eBird 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