Duck Knob billed (Sarkidiornis melanotos) female Kruger South Africa World Bird Photos Talking about an odd duck, well than I got one for you: the knob billed duck! How weird and cool does the male look? And their colours and spots on both of male Knob billed Duck eBird 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