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Animal Size

Siamang size: How big do they get?

How big does a Siamang get? Here is an overview over the average adult age:

A grown Siamang (Symphalangus syndactylus) reaches an average size of 82.4 cm (2′ 9″).

When born, they have an average size of 0 cm (0′ 0″). During their lifetime of about 38 years, they grow from 517 grams (1.14 lbs) to 10.84 kg (23.9 lbs). A Siamang has 1 babies at once. The Siamang (genus: Symphalangus) is a member of the family Hylobatidae.

As a reference: Humans reach an average body size of 1.65m (5′ 5″) while carrying 62 kg (137 lbs). A human woman is pregnant for 280 days (40 weeks) and on average become 75 years old.

The average adult size of a Siamang is  (2' 9

The siamang (Symphalangus syndactylus) is an arboreal black-furred gibbon native to the forests of Indonesia, Malaysia and Thailand. The largest of the gibbons, the siamang can be twice the size of other gibbons, reaching 1 m in height, and weighing up to 14 kg. The siamang is the only species in the genus Symphalangus.Two features distinguish the siamang from other gibbons. The first is that two digits on each foot—the second and third toes—are partially joined by a membrane—hence the name “syndactylus”, from the Ancient Greek sun-, “united” + daktulos, “finger”. The second is the large gular sac (found in both males and females of the species), which is a throat pouch which can be inflated to the size of the siamang’s head, allowing it to make loud, resonating calls or songs.Two subspecies of the siamang may exist. If so, they are the nominate Sumatran siamang (S. s. syndactylus) and the Malaysian siamang (S. s. continentis, in peninsular Malaysia). Otherwise, the Malaysian individuals are only a population. The siamang occurs sympatrically with other gibbons; its two ranges are entirely within the combined ranges of the agile gibbon and the lar gibbon.The siamang can live to around 40 years in captivity.While the illegal pet trade takes a toll on wild populations, the principal threat to the siamang is habitat loss in both Indonesia and Malaysia. The palm oil production industry is clearing large swaths of forest, reducing the habitat of the siamang, along with that of other species, such as the Sumatran tiger.

Animals of the same family as a Siamang

We found other animals of the Hylobatidae family:

Animals with the same size as a Siamang

Not that size really matters, but it makes things comparable. So here are a couple of animals that are as big as Siamang:

Animals with the same litter size as a Siamang

Here is a list of animals that have the same number of babies per litter (1) as a Siamang:

Animals with the same life expectancy as a Siamang

Completely different animals, but becoming as old as a Siamang:

Animals with the same weight as a Siamang

As a comparison, here are some other animals that weight as much as the Symphalangus syndactylus: