Details : Knob billed Duck BirdGuides 42 Knob Billed Duck Stock Photos, High Res Pictures, and Images Getty Images 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. COMB KNOB BILLED DUCKS (SARKIDIORNIS MELANOTOS) ROLLING HARBOUR GALLERY Knob billed Duck Sarkidiornis melanotos photo call and song The Knob billed Duck (Sarkidiornis melanotos), a large and distinctive waterfowl recognized by the bold black knob on the male's bill. This comb like structure becomes more prominent during breeding season and likely helps