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 Knob billed duck (Sarkidiornis melanotos) : r AIDKE Knob billed duck (Sarkidiornis melanotos) female isolated in white backgound in Kruger National park, South Africa Stock Photo Alamy The knob billed duck (Sarkidiornis melanotos) is today's Species of the Day. It is native to Sub Saharan Africa as well as parts of South Asia, particularly India. It was once treated as the Comb Duck (Sarkidiornis melanotos) Ian White Flickr 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