011 646 2000 | Home | Contact |    
Johannesburg Zoo


Siamango Gibbon Endangered

The largest of the gibbons, sometimes referred to as the ‘lesser’ is known for its graceful movement through the trees and impressive emotive calls. Siamang gibbons are also known as ‘syndactylus’. The name has been derived from the Ancient Greek word ‘sun’ for united and ‘daktulos’ for finger. The animal is so named as it has two fused fingers on each hand

The Zoo has 2 Siamango Gibbons a 13 year old female called Glastenberry who was born at the Marwell Zoo in the UK. She shares the enclosure with her son Tristan who was born in the Joburg Zoo and is 6 years old.

In the early hours of the morning, mother and son sing a powerful song which can be heard up to 2km away, they do this to establish pair bonds and advertise their presence and territory.

Siamang Gibbons are found in Sumatra, Peninsular Malaysia and in a small area of Peninsular Thailand.They inhabit primary and secondary tropical rainforest and favour areas with abundant fig trees. They use the tallest trees in the forest as a canopy to rest and sleep.

Around 40 percent of the siamang’s habitat has been destroyed in Sumatra, and an estimated 2,500 square km of lowland forest are being cleared each year in Peninsula Malaysia. The remaining forest is now extremely fragmented.

Capture also presents a significant problem to the siamang, which is one of the most heavily traded gibbon species in the illegal pet trade. The mother is typically shot to obtain the young siamang for sale. At present the Siamag Gibbon is endangered, which means they face a high risk of extinction in the near future.

The Siamang monkey is classified as vulnerable on the IUCN endangered species list. This means that they face a high risk of extinction in the medium term. The siamang gibbon is protected against international trade under the Convention on International Trade in Endangered Species (CITES)

Johannesburg Zoo
Copyright 2016 Johannesburg Zoo                                                                                                                                                                 Back to Top
Information manuals