Southern spectacled langur
| Southern spectacled langur | ||||||||||||
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Southern spectacled langur |
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| Systematics | ||||||||||||
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| Trachypithecus obscurus | ||||||||||||
| ( Reid , 1837) |
The southern spectacled langur ( Trachypithecus obscurus ) is a primate species from the group of the slender monkeys (Presbytini).
features
Like all crested langurs, southern spectacled langurs are slender primates with a long tail. The head body length is 42 to 61 centimeters and the tail length 50 to 85 centimeters. Males are slightly heavier at an average of 7.4 kilograms than females with 6.5 kilograms. The color of the fur is variable, the back can be brown, gray or black, the belly, the hind legs and the tail are usually lighter, the hands and feet are dark gray. The face is dark gray, around the eyes are the round, whitish drawings that give it its name. The area around the mouth is also lighter in color, and on the head they have the tuft of hair typical of their species.
distribution and habitat
Southern long-tailed langurs are native to the Malay Peninsula and some offshore islands, their range extends from southern Myanmar and Thailand to Malaysia . Their habitat are forests, although they prefer higher-lying primary and secondary forests .
Way of life
These primates are diurnal tree dwellers who mostly live in the upper layers of the trees. They move mainly on all fours and jump little compared to other primate species. They live in groups of 5 to 20 animals which, unlike most other crested langurs, do not have to be harem groups, but can also be groups of multiple men. In order to search for food, the groups often split up into smaller subgroups. They are territorial animals, the territory size is 5 to 12 hectares.
They feed mainly on leaves, but also on fruits and flowers. Like all slim monkeys, they have a multi-chambered stomach for better utilization of the difficult to digest plant food.
Mating can presumably occur all year round. After a gestation period of around five months, the female usually gives birth to a single young animal, which, like all crested langurs, is initially orange in color. Sexual maturity occurs at around three to four years of age.
Systematics
The southern spectacled langur, together with the Phayre spectacled langur and possibly the tenasserim langur, form the obscurus group within the genus of the crested langur . There are seven subspecies. The nominate form T. o. Obscurus occurs on the Malay Peninsula, the others have smaller distribution areas, mostly on the islands off the coasts of the Malay Peninsula. T. o. Carbo occurs on Pulau Langkawi , the distribution area of T. o. Flavicauda extends from the islands of Kisseraing, James and King in the Mergui Archipelago , over the surroundings of Khao Lak and extends in the south to Perlis , T. o. halonifer lives on Penang , T. o. sanctorum occurs in the Mergui Archipelago, T. o. seimundi lives on Ko Pha-ngan and T. o. styx on the Perhentian Islands .
literature
- Thomas Geissmann : Comparative Primatology. Springer-Verlag, Berlin et al. 2003, ISBN 3-540-43645-6 .
Individual evidence
- ↑ D. Zinner, GH Fickenscher & C. Roos: Family Cercopithecidae (Old World monkeys). Page 747 in Russell A. Mittermeier , Anthony B. Rylands & Don E. Wilson : Handbook of the Mammals of the World: Primates: 3rd ISBN 978-8496553897
Web links
- Trachypithecus obscurus in the endangered Red List species the IUCN 2006. Posted by: A. Eudey & Members of the Primate Specialist Group, 2000. Retrieved on April 25 of 2008.
- Information on Theprimata.com
- Information on Animal Diversity Web