Silvery gibbon
Silvery gibbon | |
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A silvery gibbon foraging in a Ficus tree. Photograph taken in Mount Halimun Salak National Park | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Mammalia |
Order: | Primates |
Suborder: | Haplorhini |
Infraorder: | Simiiformes |
Family: | Hylobatidae |
Genus: | Hylobates |
Species: | H. moloch[1]
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Binomial name | |
Hylobates moloch Audebert , 1798)
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Silvery gibbon range |
The silvery gibbon (Hylobates moloch), also known as the Javan gibbon, is a
Its coat is bluish-grey, with a dark grey or black cap. Like all gibbons, the silvery gibbon lacks an external tail, has dorsally placed scapulae, and reduced flexibility in its lumbar region. It has long, curved fingers and very long forelimbs relative to its hind limbs. On average, it reaches 8 kg (18 lb) in weight. It is
Every three years, on average, the female gives birth to a single young, after a gestation of seven months. The offspring is nursed for about 18 months and lives with the family group until it is fully mature at about eight to ten years old.[3]
Threats and conservation
The silvery gibbon ranks among the most threatened primates. It is listed as
Several zoos operate silvery gibbon breeding programs. Despite these efforts, the future survival of this species is in question.
Behaviour and ecology
Like all gibbon species, the silvery gibbon lives in pairs and stakes out territory that the pair strongly defends; it has relatively small territories of about 42 acres. Females sing to declare their territory several times a day, and if strangers are spotted, the male screams in an attempt to scare them away. The majority of the solo song bouts or scream bouts are produced by females.[7] The female vocal bouts occur after 0500 hr, with the vocal bout activity peaking around 0600 hr. In contrast, the male vocal bouts primarily occurred before 0500 hr was created in the style of a chorus, with a minimum of three participants. There are choruses around every 8.5 days. It took place sooner and lasted longer than female solo song fights. The majority of male songs begin in the dark, between 0355 and 0440 hours. The males are usually very aggressive toward others.[7]
Classification
Some authors recognize two subspecies of Hylobates moloch:[8]
- Western silvery gibbon or western Javan gibbon, H. m. moloch
- Eastern silvery gibbon or central Javan gibbon, H. m. pongoalsoni
References
- OCLC 62265494.
- ^ . Retrieved 17 January 2022.
- ^ Kappeler, M. (1981). The Javan silvery gibbon (Hylobates lar moloch), habitat, distribution, numbers (Ph.D.). Basel: University of Basel.
- ^ a b c "The Silvery Gibbon Project". Retrieved 2007-12-11.
- ^ Supriatna, Jatna. "Conservation Programs for the Endangered Javan Gibbon" (PDF). Primate Conservation. 2006 (21): 155–162.
- ^ The Silvery Gibbon Project: "Conservation Projects" Archived 2013-12-20 at archive.today, retrieved 20 December 2013
- ^ S2CID 5900145.
- ^ Geissmann, T. "Gibbon Systematics and Species Identification". Retrieved 2006-04-13.