Facts about Hoolock Gibbons
- 09
Nocturnal resting sites called sleeping trees are revisited by Hoolock gibbons multiple times per week, with the same groups often using identical locations across consecutive years.
- 08
Fruit comprises approximately 60 percent of the Hoolock gibbon diet, with figs being the preferred food source throughout their forest habitat.
- 07
Endangered populations of Hoolock gibbons have declined by approximately 50 percent over the past three decades due to habitat loss from deforestation across their native range in India, Bangladesh, and Myanmar.
- 06
Hoolock gibbons possess white eye rings and distinctive facial markings that darken significantly as they reach sexual maturity around 8-9 years of age.
- 05
Monogamous pairs of Hoolock gibbons maintain their bonds for approximately 10-15 years, raising typically one offspring every 2-3 years in the tropical forests of their native range.
- 04
Three subspecies of Hoolock gibbons exist, with the western and eastern varieties distinguished by facial markings and geographic distribution across India, Bangladesh, and Myanmar.
- 03
With arm spans reaching up to 1.5 meters, Hoolock gibbons can swing between trees with remarkable agility despite their small body size.
- 02
Hoolock gibbons produce loud, haunting duet calls that can travel up to one kilometer through the forest canopy each morning.
- 01
Between 40 and 64 kilograms in weight, Hoolock gibbons are the smallest ape species found across northeastern India and Southeast Asia.