Western Hoolock Gibbon

The western hoolock gibbon is a tailless canopy ape whose adult sexes differ markedly in color. Males are mostly black with contrasting pale eyebrows, while females have a much lighter buff-grey coat. Its elongated arms support brachiation beneath branches, and bonded pairs broadcast elaborate songs from high in the canopy; younger family members sometimes join the duet. The species occurs in northeastern India, Bangladesh and Myanmar west of the Chindwin River. (Wikipedia, general species account)

Western hoolock gibbons depend on connected broadleaf wet-evergreen, mixed-evergreen and dipterocarp forests, frequently in mountainous country. Ripe fruit makes up most of their diet, giving the animals an important role in seed dispersal. Flowers, leaves, shoots, ants, silkworms and other insects provide additional food. Their canopy-based movements and far-carrying calls make them more readily heard than seen within dense forest. The opened distribution account does not include China in the species' confirmed range. (Wikipedia, general species account)