How many baby François’ langurs are in a litter?
A François’ langur (Trachypithecus francoisi) usually gives birth to around 1 babies.
Upon birth, they weight 455 grams (1 lbs) and measure 36.8 cm (1′ 3″). They are a member of the Cercopithecidae family (genus: Trachypithecus). An adult François’ langur grows up to a size of 58.9 cm (2′ 0″).
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 François’ langur (Trachypithecus francoisi), also known as the Francois’ leaf monkey, Tonkin leaf monkey, or white side-burned black langur is a species of lutung and the type species of its species group. It is one of the least studied of the species belonging to the Colobinae subfamily.The species is distributed from Southwestern China to northeastern Vietnam. The total number of wild individuals is unknown, but fewer than 500 are believed to be left in Vietnam and 1,400–1,650 in China. About 60 langurs are in captivity in North American zoos. The species is named after Auguste François (1857–1935), who was the French Consul at Lungchow in southern China.
Other animals of the family Cercopithecidae
François’ langur is a member of the Cercopithecidae, as are these animals:
- Preuss’s monkey with 1 babies per pregnancy
- Black-crested Sumatran langur with 1 babies per pregnancy
- Pennant’s colobus with 1 babies per pregnancy
- Tana River red colobus with 1 babies per pregnancy
- Golden snub-nosed monkey with 1 babies per pregnancy
- Barbary macaque with 1 babies per pregnancy
- White-fronted surili weighting around 6.12 kilograms (13.49 lbs)
- L’Hoest’s monkey with 1 babies per pregnancy
- Pennant’s colobus with 1 babies per pregnancy
- White-thighed surili weighting around 5.9 kilograms (13.01 lbs)
Animals that share a litter size with François’ langur
Those animals also give birth to 1 babies at once:
- Egyptian free-tailed bat
- Western gorilla
- Dwarf musk deer
- Grey seal
- Big-eared woolly bat
- Lesser sheath-tailed bat
- Black-mantled tamarin
- Least pipistrelle
- Arctocephalus forsteri
- Schreber’s yellow bat
Animals with the same weight as a François’ langur
What other animals weight around 8.16 kg (17.98 lbs)?
- Patagonian mara usually reaching 8.03 kgs (17.7 lbs)
- Phayre’s leaf monkey usually reaching 7.69 kgs (16.95 lbs)
- Preuss’s red colobus usually reaching 8.91 kgs (19.64 lbs)
- Lowlands tree-kangaroo usually reaching 8.47 kgs (18.67 lbs)
- Andean mountain cat usually reaching 8.13 kgs (17.92 lbs)
- Tasmanian devil usually reaching 8.2 kgs (18.08 lbs)
- Andean mountain cat usually reaching 8.13 kgs (17.92 lbs)
- Maxwell’s duiker usually reaching 8.56 kgs (18.87 lbs)
- Patas monkey usually reaching 7.99 kgs (17.61 lbs)
- Tonkin snub-nosed monkey usually reaching 9.12 kgs (20.11 lbs)
Animals with the same size as a François’ langur
Also reaching around 58.9 cm (2′ 0″) in size do these animals:
- Tana River red colobus gets as big as 56 cm (1′ 11″)
- Tana River red colobus gets as big as 56 cm (1′ 11″)
- Tibetan sand fox gets as big as 60.2 cm (2′ 0″)
- Tonkin snub-nosed monkey gets as big as 56.9 cm (1′ 11″)
- Black-and-white ruffed lemur gets as big as 54.7 cm (1′ 10″)
- North American river otter gets as big as 68.5 cm (2′ 3″)
- Günther’s dik-dik gets as big as 61.2 cm (2′ 1″)
- Southern tamandua gets as big as 56.1 cm (1′ 11″)
- Pallas’s cat gets as big as 57.6 cm (1′ 11″)
- Preuss’s red colobus gets as big as 57.9 cm (1′ 11″)