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The earliest remains of Colobinae are known from the Tugen Hills of Kenya, dating to 12.5 million years ago. The earliest fossils of the genus in Eurasia are those of Mesopithecus found in Greece, dating to around 8.2 million years ago. [8] Family Cercopithecidae [1] [2] Subfamily Cercopithecinae; Subfamily Colobinae. Tribe Colobini
François' langur spends a greater part of its day travelling during the winter (20.12%) and huddling in the spring (14.62%). [8] François' langur lives in groups of 4 to 27 langurs, but will usually be found in groups around 12. [3] [9] It lives in a matriarchal society where the females lead the group.
Males weigh between 7.5 and 10.5 kg (17 and 23 lb), while the females are slightly smaller, weighing between 6.2 and 9.2 kg (14 and 20 lb). Their fur is predominantly black, with white markings on the face and distinctive creamy-white fur over the rump and the outer thighs, while females also have a patch of pale fur in the pubic area.
The northern plains gray langur is listed as least concern on the IUCN Red List, it is threatened by habitat loss. [2] The northern plains gray langur adapts to many habitats and the Hindu religion considers the northern plains gray langur to be sacred. [7] Hence it has large population within India, including within towns and cities. [7]
Like all langurs, this species' tail is noticeably long, measuring up to 98 cm in length while the body is only around 55 cm long. [4] The two subspecies of this monkey are fairly similar in appearance and are geographically separated; males and females are both usually glossy black, although the females pale, yellowish-white patch around the pubic area.
Miller's langur is a leaf monkey within the family Cercopithecidae and subfamily Colobinae. [2] It was formerly considered a subspecies of Hose's langur, Presbytis hosei (as Presbytis hosei canicrus). [3] [2] [4] [5] It was split from P. hosei on the basis of different morphology by primatologists Colin Groves and Christian Roos. [3] [6]
It was formerly considered a subspecies of the Cat Ba langur (T. poliocephalus), which is now thought to be endemic to Vietnam. [2]Its taxonomy was previously uncertain; it has been considered a partially albinistic population of the François' langur (T. francoisi), a subspecies of Francois' langur, [3] a valid species (T. leucocephalus), or a subspecies, T. poliocephalus leucocephalus.
At 26.5 kg (58 lb), the heaviest langur ever recorded was a male Nepal gray langur. [5] The larger gray langurs are rivals for the largest species of monkey found in Asia. The average weight of gray langurs is 18 kg (40 lb) in the males and 11 kg (24 lb) in the females. [7] Langurs mostly walk quadrupedally and spend half of their time on the ...