Cap langur
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Cap langur ( Trachypithecus pileatus ) |
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| Trachypithecus pileatus | ||||||||||||
| ( Blyth , 1843) |
The cap langur ( Trachypithecus pileatus ) is a species of primate from the group of the slender monkeys (Presbytini).
features
Like all crested langurs, cap langurs are slender primates with a long tail. The head body length is 49 to 71 centimeters, the tail is 83 to 100 centimeters long. Males reach 11.5 to 14 kilograms and females 9.5 to 11.5 kilograms. They are therefore among the heaviest crested langurs. Their fur is dark gray or black on the back, the belly is mostly cream-colored or yellowish, but can also be orange or reddish. The dark face is surrounded by lighter hair, on the top is the head of hair typical of the species. With regard to the color of the fur, four subspecies are distinguished: T. p. pileatus has a gray-yellow belly, T. p. Brahma has a white-yellow belly and a strikingly light head of hair. T. p. durga is characterized by an orange belly; T. p. tenebricus has a darker back than the other subspecies, in males of this subspecies the belly is white and in females light red.
distribution and habitat
Cap langurs are native to northeast India , Bangladesh and western Myanmar . The habitat of this species are forests, although they occur in different forest types.
Way of life
These primates are diurnal tree dwellers that rarely come to the ground. They live in groups of 2 to 15 animals, these are mostly harem groups with one male, several females and their offspring. The remaining males live solitary or in bachelor groups. The males in a harem group react very aggressively, especially towards these pure male groups, as other males could try to take control of the harem group or to steal the females to found their own group. These animals are territorial, but the roaming areas of the individual groups overlap considerably.
Cape langurs are herbivores that feed primarily on leaves and fruits.
Reproduction
After a gestation period of around 200 days, the female usually gives birth to a single young animal between December and April, which is initially whitish-yellow in color. Not only the mother but also the other females in the group take care of the young animal, they carry it around and cuddle with it. When sexual maturity occurs, males and females leave their birth group.
threat
The main threat to the cap langur is hunting for meat and for medical reasons, in addition to the destruction of their habitat by clearing forests. The IUCN lists the species as endangered .
Systematics
There are four subspecies: T. p. pileatus , T. p. brahma , T. p. durga and T. p. tenebricus . A former fifth subspecies is now the Shortridge langur as a separate species. Together with this and the golden langur , the cap langur forms the pileatus group within the genus of the crested langur .
literature
- Thomas Geissmann : Comparative Primatology. Springer-Verlag, Berlin et al. 2003, ISBN 3-540-43645-6 .
Web links
- Trachypithecus pileatus 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
- Photos and information on arkive.org