Knob billed Duck Sarkidiornis melanotos Knob billed Duck Holmen Birding Safaris Knob billed Duck (Sarkidiornis Melanotos) Commonly Found in Sub Saharan Africa and South Asia Stock Image Image of biodiversity, behavior: 326401309 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 Photos Knob billed Duck Sarkidiornis melanotos Birds of the World