The knob-billed duck, scientifically classified as Sarkidiornis melanotos, is a distinctive waterfowl species belonging to the family Anatidae. It is characterized by its large, bulbous knob at the base of its bill, which is a prominent feature that sets it apart from other duck species.
This unique bird is native to sub-Saharan Africa, where it frequents freshwater habitats such as lakes, rivers, and wetlands. Knob-billed ducks are known for their gregarious nature and are often observed in large flocks, sometimes numbering in the thousands. Their diet primarily consists of aquatic plants and small invertebrates, which they forage for by submerging their heads underwater.