Knob-billed Duck

Knob-billed Duck or Comb Duck (Sarkidiornis melanotos) is a very recognizable bird found in tropical areas across the world, including the Indian subcontinent, Africa and even South America. Their name stems from the large fleshy black knob or ‘comb’ on the bills of the male birds. They are amongst the largest of ducks, weighing between 1 – 3 kg and have a white head, speckled with black. The body has glossy blue and black upper part, while the neck and under-part of the body is pure white. Males are generally larger than the females.

 Knob-billed Duck flying over Basai Wetlands, Gurgaon

Though these ducks are fairly common during the summer and rainy season, I have had limited success in sighting them, and much lesser success photographing them. The only two specimens I have are posted in this blog, and hopefully, I will be able to shoot more images and post an update soon.

The knob-billed ducks breed during the rainy season around lakes and fresh water bodies. They build their nests in tree holes, and solitary males are often found on tree branches waiting for a female.  The male may have 2 or more mates during a season. The unique aspect of this species is that several females may lay eggs in one nest – often up to 50 eggs at one location!

Knob-billed Duck roosting at Keoladeo Bird Sanctuary, Bharatpur

The birds feed on vegetation, and at times eat small fish and crustaceans. They are a menace to farmers since they destroy crops, especially rice. These birds are categorized as “least concern” by IUCN, though their numbers are generally dwindling.