Knob-billed duck, African comb duck (Sarkidiornis melanotos)

Sarkidiornis melanotos is a species in the Sarkidiornis genus. It is commonly known as Knob-billed duck, African comb duck This name is unplaced name for the species in the family Anatidae subfamily Tadorninae, . . This species is found in Sub-Saharan Africa, Madagascar and Southern Asia from Pakistan to Laos and extreme southern China.