How many baby Hoolock gibbons are in a litter?
A Hoolock gibbon (Hylobates hoolock) usually gives birth to around 1 babies.
Each of those little ones spend around 232 days as a fetus before they are released into the wild. Upon birth, they weight 1.02 kg (2.24 lbs) and measure 8.5 cm (0′ 4″). They are a member of the Hylobatidae family (genus: Hylobates). An adult Hoolock gibbon grows up to a size of 54.7 cm (1′ 10″).
To have a reference: Humans obviously usually have a litter size of one ;). Their babies are in the womb of their mother for 280 days (40 weeks) and reach an average size of 1.65m (5′ 5″). They weight in at 62 kg (137 lbs), which is obviously highly individual, and reach an average age of 75 years.
The hoolock gibbons are three primate species of genus Hoolock in the gibbon family, Hylobatidae, native to eastern Bangladesh, Northeast India, Myanmar and Southwest China.Hoolocks are the second-largest of the gibbons, after the siamang. They reach a size of 60 to 90 cm and weigh 6 to 9 kg. The sexes are about the same size, but they differ considerably in coloration: males are black-colored with remarkable white brows, while females have a grey-brown fur, which is darker at the chest and neck. White rings around their eyes and mouths give their faces a mask-like appearance. The Oxford English Dictionary says that the name “Hoolock” is from the Assamese হলৌ (holou) or related languages.In northeast India, the hoolock is found south of Brahmaputra as well on the North Bank areas and east of the Dibang Rivers. Its range extends into seven states covering Arunachal Pradesh, Assam, Manipur, Meghalaya, Mizoram, Nagaland, and Tripura (The seven northeastern states of India).Like the other gibbons, they are diurnal and arboreal, brachiating through the trees with their long arms. They live together in monogamous pairs, which stake out a territory. Their calls serve to locate family members and ward off other gibbons from their territory. Their diet consists mainly of fruits, insects and leaves.Young hoolocks are born after a seven-month gestation, with milky white or buff-colored hair. After about six months, the hair of males will darken and turn black, while the female hair remains buff-colored throughout her life. After eight to 9 years, they are fully mature and their fur reaches its final coloration. Their life expectancy in the wild is about 25 years.
Other animals of the family Hylobatidae
Hoolock gibbon is a member of the Hylobatidae, as are these animals:
- Northern white-cheeked gibbon weighting around 7.32 kilograms (16.14 lbs)
- Northern white-cheeked gibbon weighting around 7.32 kilograms (16.14 lbs)
- Black crested gibbon with 1 babies per pregnancy
- Kloss’s gibbon with 1 babies per pregnancy
- Siamang with 1 babies per pregnancy
- Pileated gibbon with 1 babies per pregnancy
- Agile gibbon with 1 babies per pregnancy
- Silvery gibbon with 1 babies per pregnancy
- Hoolock gibbon with 1 babies per pregnancy
- Black crested gibbon with 1 babies per pregnancy
Animals that share a litter size with Hoolock gibbon
Those animals also give birth to 1 babies at once:
- Beluga whale
- Chestnut-bellied titi
- Plush-coated ringtail possum
- Prehensile-tailed hutia
- Fischer’s pygmy fruit bat
- Highland brush mouse
- Spotted giant flying squirrel
- Black and rufous elephant shrew
- Ringed seal
- Bicolored-spined porcupine
Animals with the same weight as a Hoolock gibbon
What other animals weight around 6.7 kg (14.77 lbs)?
- Raffles’ banded langur usually reaching 7.02 kgs (15.48 lbs)
- Brown woolly monkey usually reaching 6.27 kgs (13.82 lbs)
- White-thighed surili usually reaching 5.9 kgs (13.01 lbs)
- White-bellied spider monkey usually reaching 6.71 kgs (14.79 lbs)
- Northern nail-tail wallaby usually reaching 6.5 kgs (14.33 lbs)
- Guatemalan black howler usually reaching 7.19 kgs (15.85 lbs)
- Agile gibbon usually reaching 5.85 kgs (12.9 lbs)
- Tasmanian pademelon usually reaching 5.85 kgs (12.9 lbs)
- Milne-Edwards’s sifaka usually reaching 6.57 kgs (14.48 lbs)
- Chinese mountain cat usually reaching 5.49 kgs (12.1 lbs)
Animals with the same size as a Hoolock gibbon
Also reaching around 54.7 cm (1′ 10″) in size do these animals:
- Müeller’s gibbon gets as big as 54.5 cm (1′ 10″)
- Flat-headed cat gets as big as 46.7 cm (1′ 7″)
- Bushy-tailed mongoose gets as big as 44.6 cm (1′ 6″)
- Japanese marten gets as big as 44.2 cm (1′ 6″)
- Tonkin snub-nosed monkey gets as big as 56.9 cm (1′ 11″)
- Preuss’s red colobus gets as big as 57.9 cm (1′ 11″)
- Pallas’s cat gets as big as 57.3 cm (1′ 11″)
- Nilgiri marten gets as big as 51.3 cm (1′ 9″)
- Bahamian raccoon gets as big as 46.2 cm (1′ 7″)
- Alexander’s kusimanse gets as big as 45 cm (1′ 6″)