The Razor-billed curassow (Mitu tuberosum), is a species of curassow in the Cracidae family. It is found throughout a large part of Amazon Rainforest, though largely restricted to regions south of the Amazon River. Unlike other members of the genus Mitu, its crissum is deep chestnut and the tail-tip is white. The razor-billed curassow was formerly treated as a subspecies of Mitu mitu, but today this scientific name is restricted to the extremely rare Alagoas curassow.