Western hoolock gibbon
species of mammal
The western hoolock gibbon (Hoolock hoolock) is a primate from the gibbon family, Hylobatidae. The species is found in Assam, Mizoram, and Meghalaya in India, Bangladesh, and Myanmar west of the Chindwin River.
Classification
Mootnick and Groves stated that hoolock gibbons do not belong in the genus Bunopithecus, and placed them in a new genus, Hoolock. This genus was argued to contain two and later three distinct species, which were previously thought to be subspecies: H. hoolock, H. leuconedys, and H. tianxing. A larger evolutionary distance was later found to exist between these three species and the white-handed gibbons than between bonobos and chimpanzees.
A new subspecies of the western hoolock gibbon has been described recently from northeastern India, which has been named the Mishmi Hills hoolock gibbon, H. h. mishmiensis.
Vocalisation
Like other gibbons, hoolock gibbon pairs produce a loud, elaborate song, usually as a duet from the forest canopy, in which younger individuals of the family group may join. The song includes an introductory sequence, an organising sequence, and a great call sequence, with the male also contributing to the latter (unlike in some other gibbon species).
Habitat and Diet
In India and Bangladesh, the western hoolock gibbon is found where the canopy is contiguous, broad-leaved, wet evergreen and mixed evergreen forests, including dipterocarp forests and often in mountainous terrain.
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