The Recently Extinct Plants and Animals Database

Oreonax flavicauda (Humboldt, 1812)

Peruvian yellow-tailed woolly monkey, Yellow-tailed woolly monkey



Taxonomy & Nomenclature

Synonym/s: Simia flavicauda Humboldt, 1812; Lagothrix flavicauda (Humboldt, 1812); Oreonax hendeei Thomas, 1927


Conservation Status

Last Record: 1812? (as O. flavicauda) (Humboldt, 1812); 1926? (as O. hendeei) (Thomas, 1927)

Rediscovered in 1974

IUCN RedList status: Critically Endangered















Aquino, R. and Encarnación, F. 1994. Primates of Peru / Los Primates del Perú. Primate Report 40: 1-127.

Butchart, S. M., Barnes, R., Davies, C. W. N., Fernandez, M. and Seddon, N. 1995. Observations of two threatened primates in the Peruvian Andes. Primate Conservation 16: 15-19.

Cornejo, F., Rylands, A. B., Mittermeier, R. A. and Heymann, E. (2008). Oreonax flavicauda. The IUCN Red List of Threatened Species. Version 2014.3. ( Downloaded on 10 May 2015.

DeLuycker, A. M. (2007). Notes on the yellow-tailed woolly monkey (Oreonax flavicauda) and its status in the Protected Forest of Alto Mayo, northern Peru. Primate Conservation 22(1): 41-47.

DeLuycker, A. M. and Heymann, E. W. 2007. The Peruvian yellow tailed woolly monkey, Oreonax flavicauda (Humboldt, 1812). Primate Conservation, pp. 1-40.

Eisenberg, J.F. and Redford, K.H. 1999. Mammals of the Neotropics: The Central Neotropics. The University of Chicago Press, Chicago, USA.

Fooden, J. 1963. A revision of the woolly monkeys (genus Lagothrix). Journal of Mammalogy 44(2): 213-247.

Graves, G. R. and O'Neill, J. P. 1980. Notes on the yellow-tailed woolly monkey (Lagothrix flavicauda) of Peru. Journal of Mammalogy 61(2): 345–347.

Groves, C. P. 2001. Primate taxonomy. Smithsonian Institution Press, Washington, DC, USA.

Groves, C.P. 2005. Order Primates. In: D.E. Wilson and D.M. Reeder (eds), Mammal Species of the World, pp. 111-184. The Johns Hopkins University Press, Baltimore, Maryland, USA.

Leo Luna, M. 1980. First field study of the yellow-tailed woolly monkey. Oryx 15(4): 386–389.

Leo Luna, M. 1982. Estudio preliminar sobre la biología y ecológica del mono choro de cola amarilla Lagothrix flavicauda (Humboldt, 1812). Thesis, Universidad Nacional Agraria La Molina.

Leo Luna, M. 1984. The effect of hunting, selective logging, and clear-cutting on the conservation of the yellow-tailed woolly monkey (Lagothrix flavicauda). Thesis, University of Florida.

Leo Luna, M. 1987. Primate conservation in Peru: a case study of the yellow-tailed woolly monkey. Primate Conservation 8: 122-123.

Leo Luna, M. 1989. Biología y conservación del mono choro de cola amarilla (Lagothrix flavicauda), especie en peligro de extinción. In: C. J. Saavedra, R. A. Mittermeier and I. B. Santos (eds), La Primatologia en Latinoamérica, pp. 23-30. World Wildlife Fund, Washington, DC, USA.

McHugh, Sean M. et al. (2019). First record of the Peruvian yellow-tailed woolly monkey Lagothrix flavicauda in the Región Junín, Peru. Oryx.  doi:10.1017/S003060531900084X

Mittermeier, R. A., de Macedo Ruiz, H. and Luscombe, A. (1975a). A woolly monkey rediscovered in Peru. Oryx 13(1): 41–46.

Mittermeier, R. A., de Macedo Ruiz, H. and Luscombe, A. (1975b). Special report: Mystery monkey. Animal Kingdom 78(3): 2-7.

Mittermeier, R. A., de Macedo Ruiz, H., Luscombe, A. and Cassidy, J. (1977). Rediscovery and conservation of the Peruvian Yellow-tailed Woolly Monkey (Lagothrix flavicauda). In: Prince Rainier and Bourne, G. (eds.). Primate Conservation. New York: Acad. Press.

Napier, P. H. (1976). Catalogue of Primates in the British Museum (Nat. Hist. ). Part I: Families Callitrichidae and Cebidae. London: British Museum (Natural History).

Paredes Esquivel, Ú. M. 2003. Relaciones filogenéticas dentro del género Lagothrix "mono choro" (Primates: Atelidae). Tesis para optar el título profesional de Biólogo con Mención en Zoología. Lima, Perú Available at:

Parker, T. A. and Barkley, L. J. 1981. New locality for the yellow-tailed woolly monkey. Oryx 16(1): 71–72.

ParksWatch, Peru. 2007. Alto Mayo Protected Forest. Available at:

Ríos, M. and Ponce del Prado, C. F. 1989. El status de las áreas de conservación propuestas para choro de cola amarilla (Lagothrix flavicauda): una investigación sobre la planificación regional de áreas naturales protegidas. In: C. J. Saavedra, R. A. Mittermeier and I. B. Santos (eds), La Primatologia en Latinoamérica, pp. 31-65. World Wildlife Fund-US, Washington, DC, USA.

Serrano-Villavicencio, José Eduardo and Silveira, Luís Fábio. (2019). Notes on Lagothrix flavicauda (Primates: Atelidae): oldest known specimen and the importance of the revisions of museum specimens. Zoologia 36: e29951.

Shanee, S., Shanee, N. and Maldonado, A. M. 2007. Distribution nand ocnservationstatus of the yelow-tailed woolly monkey (Oreonax flavicauda Humboldt, 1812) in Amazonas and San Martín, Peru. Neotropical Primates 14(3): 115-119.

Thomas, Oldfield. (1927). A remarkable new monkey from Peru. Ann. Mag. Nat. Hist. 9(19): 156-157.

Thornback, Jane and Jenkins, Martin (compilers). (1982). The IUCN Mammal Red Data Book. Part 1: Threatened Mammalian Taxa of the Americas and the Australasian Zoogeographic Region (Excluding Cetacea). Gland, Switzerland: IUCN. 516 pp.


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