Family Guans, Chachalacas, Curassows (Cracidae)

Least Concern

Razor-billed Curassow (Mitu tuberosum)


French: Hocco tuberculé German: Amazonashokko Spanish: Paují tuberoso

Crax tuberosa


, 1825,

Rio Solimões, Brazil


All members of this genus have been placed, together with the members of Pauxi, and less often Nothocrax, in Crax. In the past, present species often considered conspecific with M. mitu, but genetic data suggest that it is most closely related to M. salvini and Pauxi unicornis#R. Has hybridized in captivity with several other species of curassow, including Crax alberti; at least some of these hybrids were fertile. Reported as marginally sympatric with M. salvini at some localities in Peru. Monotypic.


Amazonia in extreme SE Colombia (Amazonas), Brazil (almost exclusively S of Amazon, and E to Maranhão), Peru (S of R Marañón) and Bolivia (Pando, Beni, La Paz, Cochambamba and Santa Cruz).

Descriptive notes

83–89 cm; 2500–3860 g (male), 2320 g (one female). Well-developed crest usually carried depressed; chestnut ventral region and whitish tail tips. Massive, casque-... read more


Like M. salvini and perhaps Nothocrax, both sexes sing (albeit females much more... read more


Forest, including humid terra firme forest, gallery and Guadua bamboo-dominated... read more

Food and feeding

Mainly fruits; also seeds and leaves; occasionally insects and other animals, including one caecilian (Gymnophiona) and frogspawn laid in... read more


Season Nov–Feb in NE Peru, but commences in Aug–Dec in SE of same country. Nest placed in trees, cup-shaped construction of... read more


Presumably sedentary, although studies in SE Peru suggest that home range size is at least 150 ha,... read more

Status and conservation

Not globally threatened (Least Concern). Considered fairly common in many parts of Brazilian range, including Amazônia (Tapajós) National Park, Pará; not... read more

Recommended citation

del Hoyo, J. & Kirwan, G.M. (2020). Razor-billed Curassow (Mitu tuberosum). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from on 24 February 2020).