Avise's Birds of the World Comb Duck (Sarkidiornis melanotos) Ian White Flickr This bird wears its crown not of feathers, but of horn. The Knob billed Duck (Sarkidiornis melanotos), also known as the Comb Duck, is one of the most unmistakable waterfowl in the world. Knob billed duck sarkidiornis melanotos beautiful birds of thailand Premium Photo This is the KNOB BILLED DUCK, also known as the African Comb Duck (Sarkidiornis melanotos) This striking waterfowl is instantly recognizable by the large black knob on the bill of adult The knob billed duck (Sarkidiornis melanotos) or African comb duck is a type of duck found along the tropical sub tropical wetlands and waterways of Sub Saharan Africa and the island of Madagascar, as