sarkidiornis melanotos Knob-billed Duck / photo call and song File:Sarkidiornis melanotos - Royal Museum

File:Sarkidiornis melanotos Royal Museum for Central Africa DSC06799.JPG Wikimedia Commons Day 5: Knob billed Duck (Sarkidiornis melanotos) One of the most unmistakable ducks in southern Africa, the knob billed duck is named for the prominent black knob on the male's bill, especially noticeable Knob billed Duck (Sarkidiornis melanotos) iNaturalist The extraordinary looking Knob billed duck (Sarkidiornis melanotos) photographed in Rajkot, Gujarat, India by Raju Karia. Only males have the protrusion on the bill, which becomes more prominent during the breeding season.

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