Did you know?

Each member of the family participates in their group song

Quick Facts

Weight: 8-13kgs

Size: stand over 1m tall

Number of offspring: 1 infant every 2-3yrs

Gestation: 7 months

Maturity: 8-10yrs, independent at 3yrs

Lifespan: 30-35yrs

Predators: No immediate concerns due to high position in canopy and quick, agile movement

Screen Shot 2017-12-04 at 11.55.46 am.png

Siamang Gibbon

Symphalangus syndactylus


Tropical hill forest; Primary and secondary semi-deciduous and tropical ever green forest

Natural behavior

Diurnal and arboreal using the locomotion of brachiation and can also walk bipedally. Territorial living in home ranges, which they actively defend. Territorial calls can last 10-15 min and can be heard over a distance of 1.5-2kms. Siamang territories overlap with a number of other primate species. It is the only example in the world where 3 non-human apes coexist. Siamangs cannot swim


Largest of the Gibbon species, glossy black shaggy coat, dark hairless face, long fingers and arms which are longer than legs and can span 1.5 meters. Siamangs possess an impressive throat sac, which they use for territorial calling


South East Asia; Malay Peninsula and Samatra


Omnivore; fruits, leaves


Breeding usually occurs between May-July during peak flowering and fruiting.

Social structure

Social; Living in small monogamous family groups of up to 8, usually consisting of a dominant breeding pair and their immature offspring. Grooming is one of the most important social activities that cement social bonds


Habitat loss due to logging, clearing for palm oil plantations and agriculture, poaching and hunting for the illegal pet trade. Also susceptible to zoonotic disease