Knob-billed duck
| Knob-billed duck | |
|---|---|
| Male, Lake Ziway, Ethiopia | |
| Female, India | |
| Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Aves |
| Order: | Anseriformes |
| Family: | Anatidae |
| Genus: | Sarkidiornis |
| Species: | S. melanotos |
| Binomial name | |
| Sarkidiornis melanotos (Pennant, 1769) | |
| Global range | |
| Synonyms | |
|
Anser melanotos Pennant, 1769 | |
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 well as most of South Asia and mainland Indochina.
Most taxonomic authorities classify the knob-billed duck and the comb duck separately. A misidentified species of extinct Mauritian comb duck was initially described from unrecognised remains of the Mauritius sheldgoose (Alopochen mauritiana); this was realised as early as 1897, but the printed case of mistaken identity can still, occasionally, be found in modern-day sources.