Heck's Macaque

Kingdom Order Family Genus Species
Animalia Primates Cercopithecidae Macaca Macaca hecki
Heck's Macaque
IUCN Status: Vulnerable
  • Common Name: Heck’s Macaque
  • Taxonomy Classification Year: 1901
  • Monkey Size: 44.5 to 57 cm (17.52 to 22.44 in)
  • Skin Color(s): Silky black
  • Habitat: Rainforest, mountains
  • Diet: Omnivorous
  • Native Countries: Indonesia

Heck’s Macaque Distribution

Heck’s Macaque Characteristics

Heck's Macaque

The Heck’s Macaque[1] (Macaca hecki) is a macaque native to Sulawesi, Indonesia. This Old-World monkey is diurnal.

  • Heck’s macaques are rarely observed or photographed, so it isn’t easy to describe their appearance. However, they do look quite similar to black-crested macaques.
  • They both have tiny, almond-shaped brown eyes, silky black fur, and small vestigial tail tips, leading some to misidentify these Old-World Monkeys as great apes.
  • However, there are still some significant differences, primarily the spiny black crest on a black-crested macaque’s head, which the Heck’s macaque lacks.
  • Heck’s macaques have a broad, prominent forehead and narrow faces with sunken cheeks.

Heck’s Macaque Facts

  • Heck’s macaques are probably diurnal and semi-arboreal in primary and secondary tropical forests. They move on all fours through the forest floor and the treetops.
  • They have a multi-male, multi-female social system with group sizes ranging from 10 to 20 individuals.
  • Based on the marital line, there is a hierarchical system between group members, which makes sense since female species do not leave their natal group.
  • The open-mouthed gaze is a posture used to express threat, performed with a fixed gaze and an open mouth with covered teeth.
  • Due to their frugivorous diet, Heck’s macaques will likely act as seed dispersers throughout their habitat.

Suggested Reading: Monkey Species List

Cite This Page

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BioExplorer.net. (2022, December 06). Heck’s Macaque. Bio Explorer. https://www.bioexplorer.net/animals/mammals/monkeys/hecks-macaque/.
BioExplorer.net. "Heck’s Macaque" Bio Explorer, 06 December 2022, https://www.bioexplorer.net/animals/mammals/monkeys/hecks-macaque/.
BioExplorer.net. "Heck’s Macaque" Bio Explorer, December 06 2022. https://www.bioexplorer.net/animals/mammals/monkeys/hecks-macaque/.
Key References
  • [1]“Heck’s Macaque – New England Primate Conservancy”. Accessed November 10, 2022. Link.

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