Overview

Brief Summary

Biology

Very little is known of the biology of the Nilgiri langur. Young are born mainly in May and November, after the monsoons that bring fresh leaf growth. This langur species form groups with one male and up to 23 females and young, who move through the forest eating the leaves of 102 plant species as well as some of their fruit, flowers and seeds. As sub-adults, males begin to fight for access to females, but are then displaced by the dominant male and forced to migrate in all-male groups (3).
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Comprehensive Description

Description

The Nilgiri langur has a glossy, dark brown coat and long, thick golden to brown fur on the head. The rump and the start of the tail are highlighted with white, and females have white areas on their inner thighs, obvious from a week old. At birth, the young have pale pink skin and dark red fur, with full adult colouration being attained at three months (3).
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Distribution

Range Description

This species occurs only in the Western Ghats in southwestern India (Karnataka, Kerala, and Tamil Nadu). It is found, rather unevenly, in the hill country of the Western Ghats from the Aramboli Pass (at 8°16’N near the southern tip of India) north to Srimangala (12°01’N, 75°58’E) (Groves 2001).
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Range

Found in the Western Ghats of India (3).
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
This species is found in evergreen, semi-evergreen, moist deciduous forests, montane evergreen forests and in riparian forests in lower altitudes in some places (e.g. Megamalai and Anamalai) (Kurup 1979; Singh et al. 1997). It ranges from 300 to 2,000 m in elevation (Molur et al. 2003).

It is folivorous, but will also eat flowers, buds, seeds, bark, stems, insects, and earth (Roonwal and Mohnot 1977; Poirier 1969; Oates et al. 1979); it has been reported to be a facultative frugivore (Sushma and Singh 2006). It has also been reported to forage for cultivated cabbage, potatoes, and cauliflower and ornamental garden poppies (Poirier 1969). It is arboreal, diurnal, and typically occurs in uni-male groups (Molur et al. 2003), usually with nine or ten animals in a group.

Systems
  • Terrestrial
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Habitat

Inhabits tropical wet evergreen, semi-evergreen and riparian forests as well as teak plantations, at altitudes of between 300 – 2,000 m above sea level (1).
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Life History and Behavior

Life Expectancy

Lifespan, longevity, and ageing

Maximum longevity: 34 years (captivity) Observations: One specimen was about 34 years of age when it died in captivity (Richard Weigl 2005).
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
VU
Vulnerable

Red List Criteria
C2a(i)

Version
3.1

Year Assessed
2008

Assessor/s
Singh, M., Kumar, A. & Molur, S.

Reviewer/s
Mittermeier, R.A. & Rylands, A.B. (Primate Red List Authority)

Justification
Listed as Vulnerable as the number of mature individuals is less than 10,000 (Molur et al. 2003) across many, severely fragmented locations, with continuing decline in habitat quality, area and with no subpopulation containing more than 1,000 mature individuals.

History
  • 2004
    Vulnerable
  • 2000
    Vulnerable
  • 1996
    Vulnerable
  • 1996
    Vulnerable
  • 1994
    Indeterminate
    (Groombridge 1994)
  • 1990
    Endangered
    (IUCN 1990)
  • 1988
    Endangered
    (IUCN Conservation Monitoring Centre 1988)
  • 1986
    Vulnerable
    (IUCN Conservation Monitoring Centre 1986)
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Status

The Nilgiri langur is classified as Vulnerable (VU C2a(i)) on the IUCN Red List 2004 (1) and is listed on Appendix II of CITES (4). It is also listed under schedule I, part I of the Indian Wildlife Protection Act 1972 (1).
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Population

Population
Molur et al. (2003) estimate a total population of less than 20,000 (<10,000 mature) individuals, based on studies in a few areas (Karnataka, M. Singh pers. comm.; Kerala, S. Ram ongoing study; Tamil Nadu, M. Singh and A. Kumar pers. comm.) and extrapolated to the rest of its distribution. After the introduction of the Indian Wildlife Protection Act in 1972, the population has increased (Kurup 1979), and this trend was seen until the early 1990s. The population since then has been relatively stable (A. Kumar and M. Singh pers. comm.).

Population Trend
Decreasing
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Threats

Threats

Major Threats
This species is hunted for its skin, which is used for making drums, as well as for other parts of the body, which are used for meat as well as in traditional “medicine” (Roonwal and Mohnot 1977). Hunting has decreased in recent years due to better protection and NGO activities through community participation (A. Kumar and M. Singh pers. comm.).
According to Molur et al. (2003), past and present threats include habitat loss due to crop plantations, mining, dams, fragmentation, human settlement, hunting, road kills, deliberate fires, storms/flooding, landslides, and local trade for pets. Although fragmentation and habitat loss are threats, this species is not affected as much as lion-tailed macaques (M. Singh pers. comm.). They are better dispersers and have better colonization ability (A. Kumar pers. comm.).
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Threats

In the past, the Nilgiri langur has suffered from habitat loss and degradation as a result of agricultural expansion, mining operations, and dam construction. Currently, habitat loss due to increasing human settlements and deliberate fires, as well as hunting, road kills, and local trade for food, pets and traditional medicine, are the major threats (1). Locally it is believed that certain parts of the Nilgiri langur's body have medicinal value. The flesh and glands are used to treat asthma and the blood is drunk fresh as a rejuvenator. The replacement of native tree species with introduced, fast-growing fuel wood is also detrimental to the species (3).
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Management

Conservation Actions

Conservation Actions
The species is listed on CITES Appendix II, and Schedule I, Part I of the Indian Wildlife (Protection) Act, 1972 amended up to 2002 (Molur et al. 2003).

This species is known to occur in numerous protected areas, including: Aaralam Sanctuary, Brahmagiri Sanctuary, Chimmony Sanctuary, Chinnar Sanctuary, Eravikulam National Park, Grizzled Giant Squirrel Sanctuary, Idukki Sanctuary, Indira Gandhi Sanctuary, Kalakkad Sanctuary, Mudumalai Sanctuary, Mukurthi National Park, Mundanthurai Sanctuary, Neyyar Sanctuary, Parambikulam Sanctuary, Peechi Sanctuary, Peppara Sanctuary, Periyar National Park, Periyar Sanctuary, Shendurney Sanctuary, Silent Valley National Park, Thattekadu Sanctuary, Wayanad Sanctuary (Molur et al. 2003).

The following are recommended areas of research: taxonomy, life history, survey studies, and ecology. The following are recommended management actions: habitat management, monitoring, public education, poaching control measures, Population and Habitat Viability Assessment, and prevention of conversion of forest areas to private lands, prevention of conversion of natural private forests, coffee and cardamom plantations into tea plantations (Molur et al. 2003; M. Singh pers. comm.)
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Conservation

The Nilgiri langur is found in many wildlife sanctuaries in southwestern India, and international trade in this species is limited (1). The Wildlife Institute of India suggests that it should be obligatory for the government to restore degraded forests, including the cardamom plantations that have been abandoned following the expiration of the lease. Regular patrolling of forest is necessary to enforce protection of the Nilgiri langur (3).
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Wikipedia

Nilgiri langur

The Nilgiri langur (Trachypithecus johnii) is a lutung (a type of Old World monkey) found in the Nilgiri Hills of the Western Ghats in South India. Its range also includes Kodagu in Karnataka,Kodayar Hills in Tamil Nadu and many other hilly areas in Kerala and Tamil nadu. This primate has glossy black fur on its body and golden brown fur on its head. It is similar in size and long tailed like the gray langurs. Females have a white patch of fur on the inner thigh. It lives in troops of five to 16 monkeys. The animal is often seen encroaching into agricultural lands. Its diet consists of fruits, shoots and leaves. The species is endangered due to deforestation and poaching for its fur and flesh, the latter believed to have aphrodisiac properties.

References

  1. ^ Groves, C. (2005). Wilson, D. E.; Reeder, D. M. eds. Mammal Species of the World (3rd ed.). Baltimore: Johns Hopkins University Press. pp. 178. OCLC 62265494. ISBN 0-801-88221-4. http://www.bucknell.edu/msw3/browse.asp?id=12100723. 
  2. ^ Singh, M., Kumar, A. & Molur, S. (2008). Trachypithecus johnii. In: IUCN 2008. IUCN Red List of Threatened Species. Downloaded on 4 January 2009.
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