How big does a Siamang get? Here is an overview over the average adult age:
A grown Siamang (Hylobates 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 10.9 kg (24.03 lbs). A Siamang has 1 babies at once. The Siamang (genus: Hylobates) 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 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:
- Silvery gibbon with a size of 67.6 cm (2′ 3″)
- Northern white-cheeked gibbon with a size of 54.5 cm (1′ 10″)
- Müeller’s gibbon with a size of 54.5 cm (1′ 10″)
- Siamang with a size of 82.4 cm (2′ 9″)
- Lar gibbon with a size of 54.5 cm (1′ 10″)
- Hoolock gibbon with a size of 54.7 cm (1′ 10″)
- Northern white-cheeked gibbon with a size of 54.5 cm (1′ 10″)
- Kloss’s gibbon with a size of 51.2 cm (1′ 9″)
- Pileated gibbon with a size of 54.2 cm (1′ 10″)
- Agile gibbon with a size of 54.4 cm (1′ 10″)
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:
- Ethiopian wolf with a size of 94.1 cm (3′ 2″)
- Dhole with a size of 98.8 cm (3′ 3″)
- Fisher (animal) with a size of 75.1 cm (2′ 6″)
- Indri with a size of 73.4 cm (2′ 5″)
- North American porcupine with a size of 83.7 cm (2′ 9″)
- Jungle cat with a size of 70.6 cm (2′ 4″)
- Bobcat with a size of 69.1 cm (2′ 4″)
- Moor macaque with a size of 66 cm (2′ 2″)
- North American beaver with a size of 75.7 cm (2′ 6″)
- Indian crested porcupine with a size of 75 cm (2′ 6″)
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:
- Azara’s night monkey
- Greater short-nosed fruit bat
- Weasel sportive lemur
- Micronomus
- Bearded seal
- Kloss’s gibbon
- Preuss’s red colobus
- Southern giant slender-tailed cloud rat
- Small dorcopsis
- Venezuelan red howler
Animals with the same life expectancy as a Siamang
Completely different animals, but becoming as old as a Siamang:
- Campbell’s mona monkey with an average maximal age of 33 years
- Lion-tailed macaque with an average maximal age of 40 years
- Common genet with an average maximal age of 34 years
- Sumatran rhinoceros with an average maximal age of 35 years
- South American tapir with an average maximal age of 35 years
- Ryukyu flying fox with an average maximal age of 31 years
- Cuvier’s beaked whale with an average maximal age of 36 years
- Northern giraffe with an average maximal age of 36.25 years
- Spotted seal with an average maximal age of 35.5 years
- Rough-toothed dolphin with an average maximal age of 32 years
Animals with the same weight as a Siamang
As a comparison, here are some other animals that weight as much as the Hylobates syndactylus:
- Stump-tailed macaque with a weight of 9.38 kilos (20.68 lbs)
- Roosevelt’s muntjac with a weight of 10.76 kilos (23.72 lbs)
- Steenbok with a weight of 11.64 kilos (25.66 lbs)
- Pudú with a weight of 9.61 kilos (21.19 lbs)
- Grizzled tree-kangaroo with a weight of 12.61 kilos (27.8 lbs)
- Red forest duiker with a weight of 12.36 kilos (27.25 lbs)
- Aders’s duiker with a weight of 9.25 kilos (20.39 lbs)
- Black colobus with a weight of 9.1 kilos (20.06 lbs)
- Preuss’s red colobus with a weight of 8.91 kilos (19.64 lbs)
- Tonkin snub-nosed monkey with a weight of 9.09 kilos (20.04 lbs)