Individuality and stability in male songs of cao vit gibbons (Nomascus nasutus) with potential to monitor population dynamics.

Vocal individuality and stability has been used to conduct population surveys, monitor population dynamics, and detect dispersal patterns in avian studies. To our knowledge, it has never been used in these kinds of studies among primates. The cao vit gibbon is a critically endangered species with only one small population living in a karst forest along China-Vietnam border.

Population differences and acoustic stability in male songs of wild western black crested gibbons (Nomascus concolor) in Mt. Wuliang, Yunnan.

Population differences and acoustic stability in male songs of the western black crested gibbon (Nomascus concolor) at Mt. Wuliang, Yunnan, were investigated using data collected over 4 years. Detectable vocal differences were found between the western and eastern populations within Mt.