[57] Populations are also threatened by mining, forest fires and deforestation for wood. S. ajax Langurs are a type of leaf-eating monkey whose multi-chambered stomach allows them to digest the stodgy plant food in between feeding times. Gray langurs are primarily herbivores. Ungulates like bovine and deer will eat food dropped by foraging langurs. [61] Langurs will raid crops and steal food from houses, and this causes people to persecute them. In this photo their tails become indistinguishable from tree branches. Semnopithecus dussumieri - It is the smallest langur of all the other subspecies. However, if the mother dies, the infant usually follows. What’s the sloth’s main predator? The Gray Langur was formerly considered a single species (S. entellus). 6. They sleep during the night in trees but also on man-made structures like towers and electric poles when in human settlements. Other herbivores in Their coat may either be red, silver, brown, golden, gray or black. Males are larger than females. Nevertheless, infanticide does occur in these groups, and is suggested that such practices serve to return a female to estrous and gain the opportunity to mate.[48]. Non-plant material consumed include spider webs, termite mounds and insect larvae. This is a necessary adaptation for the digestion of its folivorous diet. Extinction is forever. Female memberships are also stable, but less so in larger groups. In multiple-male groups, the costs for infanticidal males are likely to be high as the other males may protect the infants and they can't ensure that they'll sire young with other males around. The Hanuman Langur is predominantly light-grey, with a black face, white crown, white chin, white nape, and white neck. The Nepal gray langur, also called the central Himalayan langur, lives (as the name implies) in the Himalayan region, from central Nepal to Tibet, into areas of Bhutan, India, and Pakistan. They are found in southeast Asia. These langurs are largely gray , with a black face and ears. Meanwhile, Old World monkeys also have tails (in fact, langur is a Hindi word meaning "long tail"), but they lack the ability to grasp objects. [28] They forage on agricultural crops and other human foods, and even accept handouts. [32] Relationships between groups tend to be hostile. They will also make bipedal hops, climbing and descending supports with the body upright, and leaps. one-male groups, comprising one adult male, several females and offspring; multiple-male groups, comprising males and females of all ages; loud calls or whoops made only by adult males during displays; harsh barks made by adult and subadult males when surprised by a predator; cough barks made by adults and subadults during group movements; grunt barks made mostly by adult males during group movements and agonistic interactions; rumble screams made in agonistic interactions; pant barks made with loud calls when groups are interacting; grunts made in many different situations, usually in agonistic ones; honks made by adult males when groups are interacting; rumbles made during approaches, embraces, and mounts; hiccups made by most members of a group when they find another group. The gray, or Hanuman, langur (S. entellus) of the Indian subcontinent is almost black when newborn and gray, tan, or brown as an adult. [19] It also suggested that S. priam and S. johnii diverged from each other fairly recently. In some areas, reproduction is year-around. Gray langurs exist in three types of groups: All-male groups tend to be the smallest of the groups and can consist of adults, subadults, and juveniles. A gray langur’s diet is primarily herbivorous but can change based on location, season, and food availability. [27] Wolves, jackals, Asian black bears and pythons may also prey on langurs. Click here for instructions on how to enable JavaScript in your browser. The Southern plains gray langur (Semnopithecus dussumieri) is a species of primate in the Cercopithecidae family. They will also groom each other regardless of their rank. The northern plains gray langur (Semnopithecus entellus) is a species of primate in the family Cercopithecidae. Typical habitat includes rural and forested areas. However, higher-ranking females give out and receive grooming the most. [9] A possible explanation for this is that the T. pileatus species group is the result of fairly recent hybridization between Semnopithecus and Trachypithecus. François' langur is a medium-sized primate with black, silky hair. All taxa have traditionally been placed in the single species Semnopithecus en The taxonomy has been in flux, but currently eight species are recognized. Discover (and save!) [62] Langurs stealing and biting people to get food in urban areas may also contribute to more persecutions. They have a paler underside. Known as neonatal coat coloration, the color is thought to help the young be identified for protection by their troop." The gray, or Hanuman, langur (S. entellus) of the Indian subcontinent is almost black when newborn and gray, tan, or brown as an adult. In India, the law prohibits the capturing and killing of gray langurs. 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