The red-billed curassow or red-knobbed curassow (Crax blumenbachii) is an endangered species of cracid that is endemic to lowland Atlantic Forest in the states of Espírito Santo, Bahia and Minas Gerais in southeastern Brazil.

Its population is decreasing[2] due to hunting and deforestation, and it has possibly been extirpated from Minas Gerais.

It is currently being reintroduced to Rio de Janeiro by means of individuals bred in captivity.

Females lay a clutch of one to four eggs and the young are fledged by the end of the year.

[1] The red-billed curassow has a very limited range in eastern Brazil and populations there are declining because of habitat loss and hunting.