Siamang Siamang Siamang
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Animal Profile

The male’s screams are used to intimidate other males and the female’s sounds are associated with defending the pair’s territory.

Scientific Name Hylobates syndactylus
Class Mammal
Length 3 feet (90 cm)
Weight 22 to 30 pounds (10 to 13 kg)
Life span 25 to 30 years in the wild
Number of young usually 1
Gestation 7 to 8 months
Weight at birth about 6 ounces (170 grams)
Age of maturity 8 to 9 years
Conservation status endangered

Where siamangs hang
Siamangs live in the tropical rain forests and mountain forests of Malaysia and Sumatra.

What do they eat?
The siamang’s diet includes leaves and fruits, plus occasional insects, bird eggs, or small vertebrates. Fruits, sunflower seeds, and vegetables make up their diet at the zoo.

A unique (and noisy) primate
Siamangs are the largest of all gibbons. Their body is covered in long, dense, black fur. Siamangs have elastic throat skin that inflates to the size of a grapefruit when they are making their amazingly loud calls.

Living in the leaves
Siamangs spend much of their time up in the tall trees of the forest. They move around easily in these trees by using their long slender fingers like “hooks” to hang and to swing from branch to branch. When siamangs walk on the ground or along a branch, they often hold their arms up high above their head. Siamangs are very agile and can even jump from branch to branch without using their arms at all.

Not afraid of commitment
Siamangs spend their entire lives with the same mate. When a baby is born, it clings to its mother’s fur for safety and warmth. In the baby’s second year of life, most of the care is switched to the father. A young siamang will leave its parents when it is five to six years old.