Hamlyn's Monkey

Kingdom Order Family Genus Species
Animalia Primates Cercopithecidae Cercopithecus Cercopithecus hamlyni
Hamlyn's Monkey
IUCN Status: Vulnerable
  • Common Name: Hamlyn’s Monkey
  • Taxonomy Classification Year: 1907
  • Monkey Size: 40 to 65 cm (15.75 to 25.6 in)
  • Skin Color(s): Olive gray and black
  • Habitat: Rainforest
  • Diet: Herbivorous
  • Native Countries: Democratic Republic of Congo

Hamlyn’s Monkey Distribution

Hamlyn’s Monkey Characteristics

Hamlyn's Monkey

The Hamlyn’s monkey[1] (Cercopithecus hamlyni), also called the owl-faced monkey, is an Old World monkey inhabiting the Congo’s bamboo and primary rain forests.

  • The fur of an adult Cercopithecus hamlyni is black and olive-gray. The fur is darker on the lower abdomen, hind legs, and arms.
  • An olive-gray tint appears on the backs of adults. Their almost monotonous fur makes them almost invisible to predators.
  • The fur of these animals is long, thick, and delicate. However, the face of an adult Hamlyn’s monkey is its most distinctive feature.
  • These primates have a horizontal stripe across the forehead and a vertical stripe from the center of the forehead to the lip area.
  • These two bands vary in color from creamy yellow to white, forming a T-shaped facial marking.

What Eats Hamlyn’s Monkey?

What Eats Hamlyn's Monkeys?

In the wild, Leopards (Panthera pardus) predate on Hamlyn’s Monkeys[§].

Hamlyn’s Monkey Facts

Hamlyn's Monkey

  • Hamlyn’s monkeys have unique feet and hands in elongated phalanges. These allow them a firm grip, a practical adaptation for traveling on wet bamboo.
  • Adult male and female species have bare, blue-skinned genital regions and buttocks.
  • They live in groups of fewer than 10 individuals. Within these small groups, there is only a dominant male species.
  • Hamlyn’s monkeys mark their territory with their scent to maintain their home range.
  • Vocal communication is an orientation guide and source of belonging in this dense habitat.

Suggested Reading: All Types of Monkeys

Cite This Page

BioExplorer.net. (2024, April 14). Hamlyn’s Monkey. Bio Explorer. https://www.bioexplorer.net/animals/mammals/monkeys/hamlyns-monkey/.
BioExplorer.net. "Hamlyn’s Monkey" Bio Explorer, 14 April 2024, https://www.bioexplorer.net/animals/mammals/monkeys/hamlyns-monkey/.
BioExplorer.net. "Hamlyn’s Monkey" Bio Explorer, April 14 2024. https://www.bioexplorer.net/animals/mammals/monkeys/hamlyns-monkey/.
Key References
  • [1]“UniProt”. Accessed November 29, 2022. Link.
  • [§] – Middleton, O.S, Svensson, H, Scharlemann, J.P.W, Faurby, S, Sandom, C.J. CarniDIET 1.0: A database of terrestrial carnivorous mammal diets. Global Ecology and Biogeography. https://doi.org/10.1111/geb.13296. Craig, Christie A., Eleanor I. Brassine, and Daniel M. Parker. “A record of cheetah (Acinonyx jubatus) diet in the Northern Tuli Game Reserve, Botswana.” African Journal of Ecology 55.4 (2017): 697-700.


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