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Western hoolock gibbon was created in 1834.
The Western hoolock gibbon (Hoolock hoolock) is the provincial animal of Mizoram, Republic of India.
Eastern hoolock gibbon was created in 2005.
Hoolock Gibbon
well there is nine difrent species and they are concolor gibbon, siamang gibbon, kloss gibbon, lar gibbon, pileated gibbon, hoolock gibbon and more.