Comb duck, American comb duck (Sarkidiornis sylvicola sylvicola)

Sarkidiornis sylvicola sylvicola is a species in the Sarkidiornis genus. It is commonly known as Comb duck, American comb duck This name is unplaced name for the species in the family Anatidae subfamily Tadorninae, . . This species is found in eastern Paraguay, southeastern Brazil and extreme northeastern Argentina.