East Sumatran Banded Langur

IUCN Status: Critically-Endangered
  • Common Names: East Sumatran Banded Langur, East Sumatran Banded Surili
  • Taxonomy Classification Year: 1908
  • Monkey Size: 43 to 61 cm (17 to 24 in)
  • Skin Color(s): Black
  • Habitat: Rainforest
  • Diet: Herbivorous
  • Native Countries: Indonesia

East Sumatran banded langur Distribution

East Sumatran Banded Langur Characteristics

The East Sumatran banded langur[1], also called the East Sumatran banded surili, is a monkey species in the Cercopithecidae family.

  • Slender limbs perfect for arboreal life and a long tail that project from the banded surili’s lanky body.
  • The hair on their head tends to let loose in a mohawk configuration or triangular tuft. Dark eyes search through two white circles for fruit in the canopy.
  • The species is covered in dark fur coats that are surprisingly lighter on the belly, varying from bright white to duller gray stripes.
  • As with all colobine monkeys, whose young typically have lighter fur than adults, banded surilis infants have white or fawn-colored fur until they begin darkening at around 6 months.

East Sumatran Banded Langur Facts

  • In the Riau province of Sumatra, East Sumatran Banded langurs are primarily found in the fragmented landscape of pulp and rubber plantations.
  • Generally, these surilis are shy and alert creatures, rarely leaving the comfort of their canopies.
  • They are very social. However, their refusal to be closely studied or observed leaves their daily routines and habits mainly unknown to humans.
  • The species lives in groups of at least 3 individuals but no more than 20 individuals, with an average group size of about 11.
  • East Sumatran Banded langurs send out a distinctive alarm call whenever they sense danger. Researchers have compared its sound to the crackle of a machine gun.

Suggested Reading: Monkey Species

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BioExplorer.net. (2022, December 07). East Sumatran Banded Langur. Bio Explorer. https://www.bioexplorer.net/animals/mammals/monkeys/east-sumatran-banded-langur/.
BioExplorer.net. "East Sumatran Banded Langur" Bio Explorer, 07 December 2022, https://www.bioexplorer.net/animals/mammals/monkeys/east-sumatran-banded-langur/.
BioExplorer.net. "East Sumatran Banded Langur" Bio Explorer, December 07 2022. https://www.bioexplorer.net/animals/mammals/monkeys/east-sumatran-banded-langur/.
Key References
  • [1]“East Sumatran Banded Langur – Asian Species Action Partnership”. Accessed November 24, 2022. Link.

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