Nilgiri Langur

Kingdom Order Family Genus Species
Animalia Primates Cercopithecidae Semnopithecus Semnopithecus johnii
Hooded leaf monkey
IUCN Status: Vulnerable
  • Common Names: Hooded leaf monkey, Black-leaf monkey, John’s langur, and Indian hooded leaf monkey
  • Taxonomy Classification Year: 1829
  • Monkey Size: 58 to 80 cm (22.83 to 31.50 in)
  • Skin Color(s): Black
  • Habitat: Forest, mountains
  • Diet: Omnivorous
  • Native Countries: India

Hooded leaf monkey Distribution

Nilgiri Langur Characteristics

Nilgiri Langur

The Nilgiri langur[1] (Semnopithecus johnii), also called the black-leaf monkey, John’s langur, and Indian hooded leaf monkey is a langur (a species of Old-World monkey) found in the Nilgiri foothills of the Western Ghats in southern India.

Black Leaf Monkey

  • These langurs’ range also includes Kodagu in Karnataka, Kodayar Hills in Tamil Nadu, and many other mountainous regions of Tamil Nadu and Kerala.
  • Nilgiri langurs have a glossy black coat with a reddish brown to golden head. Newborns are reddish-brown until ten weeks of age when they take on the color of adults.
  • Like purple-faced langurs, Nilgiri langurs have dark faces and white whiskers. In addition, female species have white patches on their thighs that distinguish them from male species.
  • Nilgiri langurs are sexually dimorphic, with males being slightly larger than females.

Indian Hooded Leaf Monkeys

Nilgiri Langur Facts

John's Langur

  • Generally, Nilgiri langurs live in small groups centered around females. These groups can consist of one male and several females, several males and several females, or one or more solitary males.
  • At the peak of its activity, it alternates between the feeding and resting phases.
  • They exhibit subtle dominance hierarchies. Within each group, there are two dominance structures, one for males and one for females.
  • Nilgiri langurs show territorial behavior when confronted with other species groups. This territorial defense directly involves a single adult male from each group.
  • Nilgiri langurs communicate primarily through vocalization. Vocal communication is observed during the maintenance of social hierarchy, in territorial conflicts, in the context of female-female conflicts within the group, and finally, during male interventions in these conflicts.

Semnopithecus Johnii

Suggested Reading: Monkey Species List

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BioExplorer.net. (2022, December 06). Nilgiri Langur. Bio Explorer. https://www.bioexplorer.net/animals/mammals/monkeys/nilgiri-langur/.
BioExplorer.net. "Nilgiri Langur" Bio Explorer, 06 December 2022, https://www.bioexplorer.net/animals/mammals/monkeys/nilgiri-langur/.
BioExplorer.net. "Nilgiri Langur" Bio Explorer, December 06 2022. https://www.bioexplorer.net/animals/mammals/monkeys/nilgiri-langur/.
Key References
  • [1]“Nilgiri Langur: Species in World Land Trust reserves”. Accessed September 24, 2022. Link.

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