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Comb duck.jpg
Comb duck (Sarkidiornis sylvicola)
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Anseriformes
Family: Anatidae
Subfamily: Tadorninae
Genus: Sarkidiornis
Eyton, 1838

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[who?], however, split the species into two:

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