It is hard to guess what a Siamang weights. But we have the answer:
An adult Siamang (Hylobates syndactylus) on average weights 10.9 kg (24.03 lbs).
The Siamang is from the family Hylobatidae (genus: Hylobates). It is usually born with about 517 grams (1.14 lbs). They can live for up to 38 years. When reaching adult age, they grow up to 82.4 cm (2′ 9″). Usually, Siamangs have 1 babies per litter.
As a reference: An average human weights in at 62 kg (137 lbs) and reaches an average size of 1.65m (5′ 5″). Humans spend 280 days (40 weeks) in the womb of their mother and reach around 75 years of age.
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:
- Northern white-cheeked gibbon bringing 7.32 kilos (16.14 lbs) to the scale
- Hoolock gibbon bringing 6.7 kilos (14.77 lbs) to the scale
- Müeller’s gibbon bringing 5.92 kilos (13.05 lbs) to the scale
- Northern white-cheeked gibbon bringing 7.32 kilos (16.14 lbs) to the scale
- Siamang bringing 10.84 kilos (23.9 lbs) to the scale
- Lar gibbon bringing 5.6 kilos (12.35 lbs) to the scale
- Pileated gibbon bringing 5.57 kilos (12.28 lbs) to the scale
- Kloss’s gibbon bringing 5.84 kilos (12.87 lbs) to the scale
- Black crested gibbon bringing 6.41 kilos (14.13 lbs) to the scale
- Hoolock gibbon bringing 6.7 kilos (14.77 lbs) to the scale
Animals with the same weight as a Siamang
As a comparison, here are some other animals that weight as much as the Hylobates syndactylus:
- Fossa (animal) with a weight of 9.5 kilos (20.94 lbs)
- Ground pangolin with a weight of 11.92 kilos (26.28 lbs)
- Agile wallaby with a weight of 11.86 kilos (26.15 lbs)
- Binturong with a weight of 13 kilos (28.66 lbs)
- Southern muriqui with a weight of 10.57 kilos (23.3 lbs)
- Serval with a weight of 11.9 kilos (26.23 lbs)
- Preuss’s red colobus with a weight of 8.87 kilos (19.55 lbs)
- Water deer with a weight of 12.73 kilos (28.06 lbs)
- Greater long-nosed armadillo with a weight of 9.7 kilos (21.38 lbs)
- Fishing cat with a weight of 8.83 kilos (19.47 lbs)
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:
- Bobcat with a size of 69.1 cm (2′ 4″)
- Honey badger with a size of 68.4 cm (2′ 3″)
- Black-backed jackal with a size of 70.9 cm (2′ 4″)
- Aders’s duiker with a size of 69 cm (2′ 4″)
- Binturong with a size of 78.7 cm (2′ 7″)
- Thomson’s gazelle with a size of 88.5 cm (2′ 11″)
- Black-fronted duiker with a size of 94.4 cm (3′ 2″)
- Blue duiker with a size of 69.3 cm (2′ 4″)
- Hog badger with a size of 69.2 cm (2′ 4″)
- Collared peccary with a size of 88.6 cm (2′ 11″)
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:
- Hoffmanns’s titi
- Phayre’s leaf monkey
- Rufous soft-furred spiny rat
- Goldman’s woodrat
- Large mosaic-tailed rat
- Short-snouted elephant shrew
- Mediterranean horseshoe bat
- Javan rhinoceros
- Bahamian hutia
- Little brown bat
Animals with the same life expectancy as a Siamang
Completely different animals, but becoming as old as a Siamang:
- Grivet with an average maximal age of 31.58 years
- Little brown bat with an average maximal age of 34 years
- Humboldt’s white-fronted capuchin with an average maximal age of 44 years
- Beluga whale with an average maximal age of 40 years
- Black capuchin with an average maximal age of 44 years
- Red-faced spider monkey with an average maximal age of 37.75 years
- Anoa with an average maximal age of 36 years
- Black-and-white ruffed lemur with an average maximal age of 32 years
- Hooded seal with an average maximal age of 35 years
- Spotted hyena with an average maximal age of 41.08 years