East Javan langur, Ebony lutung, Javan langur
The Javan lutung (Trachypithecus auratus) is a species of Old World monkey. The Latin word auratus in its scientific name means "golden", and refers to a less common color variant. The Javan lungur has a specialised stomach to digest plant material more efficiently. This species also has enlarged salivary glands to assist it in breaking down food.
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DiurnalDiurnal animals are active during the daytime, with a period of sleeping or other inactivity at night. The timing of activity by an animal depends ...
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FolivoreIn zoology, a folivore is a herbivore that specializes in eating leaves. Mature leaves contain a high proportion of hard-to-digest cellulose, less ...
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FrugivoreA frugivore is an animal that thrives mostly on raw fruits or succulent fruit-like produce of plants such as roots, shoots, nuts, and seeds. Approx...
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HerbivoreA herbivore is an animal anatomically and physiologically adapted to eating plant material, for example, foliage, for the main component of its die...
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ArborealArboreal locomotion is the locomotion of animals in trees. In habitats in which trees are present, animals have evolved to move in them. Some anima...
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ZoochoryZoochory animals are those that can disperse plant seeds in several ways. Seeds can be transported on the outside of vertebrate animals (mostly mam...
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Island endemicIsland endemic animals are found in a single defined geographic location, such as an island. Animals or organisms that are indigenous to a place ar...
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ScansorialScansorial animals are those that are adapted to or specialized for climbing. Many animals climb not only in tress but also in other habitats, such...
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TerritorialA territory is a sociographical area that which an animal consistently defends against the conspecific competition (or, occasionally, against anima...
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ViviparousAmong animals, viviparity is the development of the embryo inside the body of the parent. The term 'viviparity' and its adjective form 'viviparous'...
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PolygynyPolygyny is a mating system in which one male lives and mates with multiple females but each female only mates with a single male.
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Cooperative breederCooperative breeding is a social system where offspring receive care not only from their parents but also from additional group members, often call...
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Dominance hierarchyA dominance hierarchy (formerly and colloquially called a pecking order) is a type of social hierarchy that arises when members of animal social gr...
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Not a migrantAnimals that do not make seasonal movements and stay in their native home ranges all year round are called not migrants or residents.
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starts withThe two subspecies of the Javan lutung are fairly similar in appearance and are geographically separated; males and females are both usually glossy black, although the females have a pale, yellowish-white patch around the pubic area. Juveniles of both subspecies are orange in color. The nominate subspecies Trachypithecus auratus auratus has a rare morph that does not lose its juvenile coloration when it matures, instead, the coloration darkens slightly, with yellow tinges on its sides, limbs, and around its ears, and a black tinge on its back.
These lutungs are found on the island of Java, as well as on several of the surrounding Indonesian islands. They live in rainforests, mangroves, swamp forests, and lowland and montane forests.
Javan lutungs are diurnal and arboreal monkeys that spend most of their time in trees. They live in groups of around 7 individuals, with one or two adult males in the group. Although they will look after offspring of other mothers as well as their own, adult females are aggressive towards females from other groups. The brighter coloring of juveniles may alert females to their presence and ensures that they will always be noticed and protected.
Javan lutungs are herbivores (folivores, frugivores). They eat leaves, fruit, flowers, and flower buds. They also supplement their diet with insect larvae.
Javan lutungs are polygynous; they don't form pairs and one male mates with more than one female. These monkeys do not have a certain period for mating season and females produce one offspring at a time. The infant is born precocial; it develops quickly and becomes independent within 1 year after birth. Young females usually become reproductively mature and begin to breed around 3 to 4 years of age.
Javan lutungs are threatened by the illegal pet trade and hunting for food and local medical purposes. These animals also suffer from the continuing loss of their native habitat.
The IUCN Red List and other sources don’t provide the number of the Javan lutung total population size. Currently, this species is classified as Vulnerable (VU) on the IUCN Red List, and its numbers today are decreasing.
Social animals are those animals that interact highly with other animals, usually of their own species (conspecifics), to the point of having a rec...