[7] Gibbons are forest dwellers and are well known for their habit of swinging between the branches of the rainforest on their long arms, a method of locomotion known as brachiation.

Led by the female, the breeding pair partakes in vigorous bouts of singing in the morning, which hauntingly echo through the forest.

These 'duets' are believed to be essential in pair bond formation and reinforcement, and also serve to advertise the presence of the group within the territory.

Black-crested gibbons live arboreally in small groups, most of which consist of a pair of adults, one male and one female, and their offspring.

[10] Upon the discovery of single male, multi-female living groups, the question arose to determine if all females were mating.

The observation that offspring of similar ages lived within a multi-female group confirmed that polygyny did in fact occur.

[8] Other observations have been made that males will share child carrying to place less of a burden on the female, delaying her interbirth time.

[9] The conflicting observations support the hypothesis that black-crested gibbons demonstrate both monogamous and polygamous sexual relationships.

[12] The black crested gibbon has a discontinuous distribution across southwestern China, northwestern Laos, and northern Vietnam.

[3] The black crested gibbon inhabits tropical evergreen, semievergreen, deciduous forests in subtropical and mountainous areas.

[3] The western black crested gibbons were included on the State Forestry Bureau of China's list of 12 flagship and keystone species for biodiversity protection in 2021.

[15] Ecological corridors were put in place in the Hengduan Mountain in China to help restore connections between different groups, increase overall well-being, and decrease the risk of extinction.