Sarkidiornis
# Sarkidiornis

Sarkidiornis is a genus within the family Anatidae. Sarkidiornis is sometimes considered a monotypic genus with its sole member the knob-billed duck (S. melanotos), a cosmopolitan species. Most taxonomic authorities, however, split the species into two:

| Image | Scientific name | Common name | Distribution |
| - | - | - | - |
| | Sarkidiornis melanotos | Knob-billed duck | Sub-Saharan Africa, Madagascar and Southern Asia from Pakistan to Laos and extreme southern China |
| | Sarkidiornis sylvicola | Comb duck | eastern Paraguay, southeastern Brazil and extreme northeastern Argentina |
