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S. entellus was previously known as Presbytis entellus. They received their common name, Hanuman langur, from Hanuman who is the monkey-god.

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bibliographic citation
Semke, R. 2011. "Semnopithecus entellus" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Semnopithecus_entellus.html
author
Rebecca Semke, University of Wisconsin-Stevens Point
editor
Stefanie Stainton, University of Wisconsin-Stevens Point
editor
Christopher Yahnke, University of Wisconsin-Stevens Point
editor
John Berini, Special Projects
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Behavior

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Hanuman langurs have about 19 different types of calls. In the morning, mature males make a loud whooping call when leaving their sleeping trees. They may also make cacophonous barks if they are surprised by a predator. Adult and sub-adult males often grunt or cough during group movements. Isolation peeps can be heard from members who get lost or separated from their group. They often groom each other, which is performed according to local dominance hierarchies. Dominant Hanuman langurs groom one another and receive grooming more often than subordinate langurs. They use their vision to find food and move around their environment and females display estrous via head shaking.

Communication Channels: visual ; tactile ; acoustic

Perception Channels: visual ; tactile ; acoustic ; chemical

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bibliographic citation
Semke, R. 2011. "Semnopithecus entellus" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Semnopithecus_entellus.html
author
Rebecca Semke, University of Wisconsin-Stevens Point
editor
Stefanie Stainton, University of Wisconsin-Stevens Point
editor
Christopher Yahnke, University of Wisconsin-Stevens Point
editor
John Berini, Special Projects
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Conservation Status

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Hanuman langurs are listed as a species of "least concern" on the IUCN Red List of Threatened Species. It was previously listed as near threatened in 2004.

US Federal List: no special status

CITES: appendix i

State of Michigan List: no special status

IUCN Red List of Threatened Species: least concern

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cc-by-nc-sa-3.0
copyright
The Regents of the University of Michigan and its licensors
bibliographic citation
Semke, R. 2011. "Semnopithecus entellus" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Semnopithecus_entellus.html
author
Rebecca Semke, University of Wisconsin-Stevens Point
editor
Stefanie Stainton, University of Wisconsin-Stevens Point
editor
Christopher Yahnke, University of Wisconsin-Stevens Point
editor
John Berini, Special Projects
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Benefits

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Hanuman langurs are known to raid crops and steal food from people’s homes.

Negative Impacts: crop pest

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The Regents of the University of Michigan and its licensors
bibliographic citation
Semke, R. 2011. "Semnopithecus entellus" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Semnopithecus_entellus.html
author
Rebecca Semke, University of Wisconsin-Stevens Point
editor
Stefanie Stainton, University of Wisconsin-Stevens Point
editor
Christopher Yahnke, University of Wisconsin-Stevens Point
editor
John Berini, Special Projects
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Benefits

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Hanuman langurs are sacred animals in many parts of India. Various body parts are sometimes kept as amulets, which are thought to have a positive effect on the bearer (Gron, 2008).

Positive Impacts: pet trade ; body parts are source of valuable material

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cc-by-nc-sa-3.0
copyright
The Regents of the University of Michigan and its licensors
bibliographic citation
Semke, R. 2011. "Semnopithecus entellus" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Semnopithecus_entellus.html
author
Rebecca Semke, University of Wisconsin-Stevens Point
editor
Stefanie Stainton, University of Wisconsin-Stevens Point
editor
Christopher Yahnke, University of Wisconsin-Stevens Point
editor
John Berini, Special Projects
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Associations

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Hanuman langurs live sympatrically with Bonnet macaques (Macaca radiata), toque macaque (Macaca sinica), and hooded leaf monkeys (Trachypithecus johnii). Each species occupies a distinct niche, therefore, they are able to live with one another with little to no resource competition. Soapberry bug nymphs (Leptocoris augur) rely on Hanuman langurs to remove fruit casings, enabling them to eat.

Ecosystem Impact: disperses seeds

Commensal/Parasitic Species:

  • Soapberry bug (Leptocoris augur)
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The Regents of the University of Michigan and its licensors
bibliographic citation
Semke, R. 2011. "Semnopithecus entellus" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Semnopithecus_entellus.html
author
Rebecca Semke, University of Wisconsin-Stevens Point
editor
Stefanie Stainton, University of Wisconsin-Stevens Point
editor
Christopher Yahnke, University of Wisconsin-Stevens Point
editor
John Berini, Special Projects
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Trophic Strategy

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Hanuman langurs are primarily herbivores. Their diet is composed of leaves (52-61%), fruits (15-25%), flowers (4-13%), insects (0.4-3%), and other foods such as bark, gum, and soil (9-16%) (Gron, 2008). More developed leaves are preferred over young leaves. They are not highly selective foragers, and consume human food when available. In times of food shortage, they are known to consume bark.

Animal Foods: insects

Plant Foods: leaves; wood, bark, or stems; seeds, grains, and nuts; fruit; flowers; lichens

Primary Diet: herbivore (Folivore )

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The Regents of the University of Michigan and its licensors
bibliographic citation
Semke, R. 2011. "Semnopithecus entellus" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Semnopithecus_entellus.html
author
Rebecca Semke, University of Wisconsin-Stevens Point
editor
Stefanie Stainton, University of Wisconsin-Stevens Point
editor
Christopher Yahnke, University of Wisconsin-Stevens Point
editor
John Berini, Special Projects
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Distribution

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The geographic range of Semnopithecus entellus (Hanuman langur) spans from Kashmir in north India and the Himalayas in Nepal, Bhutan, and Tibet south to Sri Lanka, east to Bangladesh and west to the Indus valley in Pakistan (Gron, 2008). It is thought that a single breeding pair resulted in the population found in southeast Bangladesh.

Biogeographic Regions: oriental (Introduced , Native )

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The Regents of the University of Michigan and its licensors
bibliographic citation
Semke, R. 2011. "Semnopithecus entellus" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Semnopithecus_entellus.html
author
Rebecca Semke, University of Wisconsin-Stevens Point
editor
Stefanie Stainton, University of Wisconsin-Stevens Point
editor
Christopher Yahnke, University of Wisconsin-Stevens Point
editor
John Berini, Special Projects
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Habitat

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Hanuman langurs are found in a wide variety of habitats, ranging from arid to tropical evergreen rainforests. They are also known to live in close proximity to humans, including the city of Jodhpur, India, which has over a million inhabitants (Gron, 2008). They are forest dwelling primates in India but are found only in forest openings in Bangladesh (Farid Ahsan and Reza Khan, 2006). The amount of rainfall varies greatly throughout their range (10 to 200 cm). Hanuman langurs are able to withstand a wide range of temperatures, from -7˚C to 46˚C, and spend about 80% of their time on the ground.

Habitat Regions: temperate ; tropical ; terrestrial

Terrestrial Biomes: savanna or grassland ; forest ; rainforest ; scrub forest

Other Habitat Features: urban ; suburban

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The Regents of the University of Michigan and its licensors
bibliographic citation
Semke, R. 2011. "Semnopithecus entellus" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Semnopithecus_entellus.html
author
Rebecca Semke, University of Wisconsin-Stevens Point
editor
Stefanie Stainton, University of Wisconsin-Stevens Point
editor
Christopher Yahnke, University of Wisconsin-Stevens Point
editor
John Berini, Special Projects
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Life Expectancy

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In captivity Hanuman langurs often live into their early thirties. In the wild, males can live to 18 years old, and females can live to 30 years old.

Typical lifespan
Status: wild:
18 to 30 years.

Typical lifespan
Status: captivity:
>30 (high) years.

license
cc-by-nc-sa-3.0
copyright
The Regents of the University of Michigan and its licensors
bibliographic citation
Semke, R. 2011. "Semnopithecus entellus" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Semnopithecus_entellus.html
author
Rebecca Semke, University of Wisconsin-Stevens Point
editor
Stefanie Stainton, University of Wisconsin-Stevens Point
editor
Christopher Yahnke, University of Wisconsin-Stevens Point
editor
John Berini, Special Projects
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Morphology

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Hanuman langurs have brownish gray fur, with a tinge of red on their dorsal surface and white fur on their ventral surface. Their feet, hands, face, and ears are black, and their face is framed with white fur. Their tail is usually longer than the body, with a white tip. Infants are born with fine, dark brown or black fur. Their skin is pale, but darkens to black by three months old. They are sexually dimorphic, with males being slightly larger than females. Males weigh about 13 kg and females weigh about 9.9 kg. Excluding their tail, males are about 64 cm long, and females are about 58.5 cm long. Male Hanuman langur tails average 91.0 cm and those of females average 86 cm. They have 32 teeth and their dental formula is 2/2 1/1 2/2 3/3.

Range mass: 9.9 to 13 kg.

Range length: 58.5 to 64 cm.

Other Physical Features: endothermic ; homoiothermic; bilateral symmetry

Sexual Dimorphism: male larger

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The Regents of the University of Michigan and its licensors
bibliographic citation
Semke, R. 2011. "Semnopithecus entellus" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Semnopithecus_entellus.html
author
Rebecca Semke, University of Wisconsin-Stevens Point
editor
Stefanie Stainton, University of Wisconsin-Stevens Point
editor
Christopher Yahnke, University of Wisconsin-Stevens Point
editor
John Berini, Special Projects
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Associations

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Hanuman langurs are preyed upon by leopards (Panthera pardus), dholes (Cuon alpinus), tigers (Panthera tigris), wolves (Canis lupus), and golden jackals (Canis aureus). They sleep in the upper forest canopy to avoid predators while resting; however, deforestation has reduced the number of roosting trees, giving predators easier access to langurs, potentially increasing predator induced mortality (Gron, 2008).

Known Predators:

  • leopards (Panthera pardus )
  • dholes (Cuon alpinus)
  • tigers (Panthera tigris)
  • wolves (Canis lupus)
  • golden jackals (Canis aureus)
license
cc-by-nc-sa-3.0
copyright
The Regents of the University of Michigan and its licensors
bibliographic citation
Semke, R. 2011. "Semnopithecus entellus" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Semnopithecus_entellus.html
author
Rebecca Semke, University of Wisconsin-Stevens Point
editor
Stefanie Stainton, University of Wisconsin-Stevens Point
editor
Christopher Yahnke, University of Wisconsin-Stevens Point
editor
John Berini, Special Projects
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Reproduction

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Hanuman langurs live in both polygynous and polygynandrous groups, and unpaired males form bachelor groups. Male dominance is usually determined through fighting, whereas younger, sexually mature females are higher ranking, and decrease in rank with age. Females advertise estrous via head shaking and presenting the anogenital region to potential mates. Females continue mating during gestation to prevent infanticide by dominant males.

Mating System: polygynous ; polygynandrous (promiscuous)

Females typically reach sexual maturity by 2.9 years of age, with males reaching sexual maturity by 5 years of age. Hanuman langurs breed between July and October, and parturition occurs between February and April. Gestation lasts for 200 to 212 days, after which a single infant is usually born. Although rare, females may also give birth to twins.

Breeding interval: Hanuman langurs breed once annually.

Breeding season: Varies by locations, but often falls between July to October.

Range number of offspring: 1 to 2.

Range gestation period: 200 to 212 days.

Range weaning age: 8.6 to 13 months.

Range time to independence: 1 to 2 years.

Average age at sexual or reproductive maturity (female): 2.9 years.

Average age at sexual or reproductive maturity (male): 5 years.

Key Reproductive Features: iteroparous ; seasonal breeding ; gonochoric/gonochoristic/dioecious (sexes separate); sexual ; fertilization ; viviparous

Infant Hanuman langurs spend the first week of life with their mothers. After that, infants are also cared for by other females that have recently given birth to young; however, the mother still provides most of the care. By six weeks old, infants begin eating on their own. Weaning doesn’t begin until 8 months old and is complete by 13 months old. Between the ages of 9 to 12 months, infants are only around their mother 20% of the time. Males are forced to disperse before they become sexually mature, while females stay with their natal group. Hanuman langurs are independent by 2 years old.

Mothers are very protective of their infants, which often remain at the center of the group for increased protection. Females from surrounding groups sometimes kidnap infants, however, mothers often risk their lives to retrieve their offspring.

Parental Investment: altricial ; female parental care ; pre-fertilization (Provisioning, Protecting: Female); pre-hatching/birth (Provisioning: Female, Protecting: Female); pre-weaning/fledging (Provisioning: Female, Protecting: Female); pre-independence (Provisioning: Female, Protecting: Female); post-independence association with parents

license
cc-by-nc-sa-3.0
copyright
The Regents of the University of Michigan and its licensors
bibliographic citation
Semke, R. 2011. "Semnopithecus entellus" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Semnopithecus_entellus.html
author
Rebecca Semke, University of Wisconsin-Stevens Point
editor
Stefanie Stainton, University of Wisconsin-Stevens Point
editor
Christopher Yahnke, University of Wisconsin-Stevens Point
editor
John Berini, Special Projects
original
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Animal Diversity Web