Kalimantan langur

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Kalimantan langur
Presbytis hosei canicrus.jpg

Kalimantan langur ( Presbytis canicrus )

Systematics
Superfamily : Tailed Old World Monkey (Cercopithecoidea)
Family : Vervet monkey relatives (Cercopithecidae)
Subfamily : Common monkeys and colobus monkeys (Colobinae)
Sub tribus : Langur (Presbytina)
Genre : Boned langurs ( Presbytis )
Type : Kalimantan langur
Scientific name
Presbytis canicrus
( Miller , 1934)

The Kalimantan langur ( Presbytis canicrus , syn .: P. hosei canicrus , Semnopithecus canicrus ) is a primate from the group of slender monkeys (Presbytini), which occurs in the east of the island of Borneo . Their distribution area probably coincides roughly with the territory of the Indonesian province of Kalimantan Timur , but its exact geographical boundaries are not known.

features

The Kalimantan langur is a small and particularly long-tailed species among the cap langurs and is similar to the Sabah langur ( P. sabana ). It reaches a head-trunk length of around 48 to 56 cm, a tail length of 65 to 84 cm and a weight of 5.5 to 6 kg (females) and 6 to 7 kg (males). The fur on the back is iron gray with white tips of hair. The ventral side and the insides of the limbs are gray to whitish. Hands and feet are black; this coloration can also extend to the forearms and lower legs. The hood typical for the genus is black. The skin of the face is blackish or reddish, and pink on the lower jaw and cheeks. Young animals are white with a black, cross-shaped drawing on their back.

Way of life

The Kalimantan langur lives in the tropical rainforest , which is mainly characterized by wing fruit plants (Dipterocarpaceae) in its habitat . It occurs up to heights of 1000 meters, sometimes up to 1600 meters and possibly higher and lives sympatric with the white- forehead langur ( Presbytis frontata ) and the chestnut langur ( Presbytis rubicunda ). The monkeys live in groups of a maximum of eight specimens. They consist of one male, two to four females and their young. The Kalimantan langur spends more than 60% of its time in the upper area of ​​the trees (> 20 m), around 30% in the middle and lower area at heights of 10 to 20 meters. Kalimantan langurs feed primarily on young and just sprouting leaves (66%), as well as unripe fruits (28%), seeds, bird eggs and nestlings . A presumably medically effective mud is absorbed from mineral-rich springs.

Danger

The Kalimantan langur is listed as endangered by the International Union for Conservation of Nature and Natural Resources ( IUCN ) and is legally protected in Indonesia. The population of the species has decreased continuously in recent years.

literature