ISBN: | 978-5-5140-2291-5 |
High Quality Content by WIKIPEDIA articles! The northern white-cheeked gibbon (Nomascus leucogenys) is a species of gibbon native to Vietnam, Laos, and the Yunnan province of China. It is closely related to the southern white-cheeked gibbon (Nomascus siki), with which it was previously considered conspecific. The females of the two species are virtually indistinguishable in appearance.