How many baby Proboscis monkeys are in a litter?
A Proboscis monkey (Nasalis larvatus) usually gives birth to around 1 babies.
Each of those little ones spend around 165 days as a fetus before they are released into the wild. Upon birth, they weight 450 grams (0.99 lbs) and measure 3 cm (0′ 2″). They are a member of the Cercopithecidae family (genus: Nasalis). An adult Proboscis monkey grows up to a size of 64.7 cm (2′ 2″).
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 proboscis monkey (Nasalis larvatus) or long-nosed monkey, known as the bekantan in Indonesia, is an arboreal Old World monkey with an unusually large nose, a reddish-brown skin color and a long tail. It is endemic to the southeast Asian island of Borneo and is found mostly in mangrove forests and on the coastal areas of the island.This species co-exists with the Bornean orangutan. It belongs in the monotypic genus Nasalis.
Other animals of the family Cercopithecidae
Proboscis monkey is a member of the Cercopithecidae, as are these animals:
- Hamadryas baboon with 1 babies per pregnancy
- Crab-eating macaque with 1 babies per pregnancy
- Mentawai langur with 1 babies per pregnancy
- Silvery lutung with 1 babies per pregnancy
- Thomas’s langur weighting around 6.69 kilograms (14.75 lbs)
- Angolan talapoin with 1 babies per pregnancy
- Pennant’s colobus with 1 babies per pregnancy
- Black colobus weighting around 9.1 kilograms (20.06 lbs)
- Bonnet macaque with 1 babies per pregnancy
- Zanzibar red colobus with 1 babies per pregnancy
Animals that share a litter size with Proboscis monkey
Those animals also give birth to 1 babies at once:
- Indo-Pacific humpback dolphin
- Western white-eared giant rat
- Egyptian fruit bat
- Granada hare
- Zanzibar red colobus
- Gayal
- Leschenault’s rousette
- Proserpine rock-wallaby
- Tailed tailless bat
- Monk saki
Animals that get as old as a Proboscis monkey
Other animals that usually reach the age of 21 years:
- Eastern lesser bamboo lemur with 17.08 years
- Sumatran serow with 21 years
- Northern elephant seal with 20.25 years
- Waterbuck with 19.92 years
- Dama gazelle with 17.25 years
- Himalayan tahr with 21.75 years
- Platypus with 22 years
- Pond bat with 19.5 years
- Cotton-top tamarin with 23.08 years
- Pacific white-sided dolphin with 25 years
Animals with the same weight as a Proboscis monkey
What other animals weight around 12.28 kg (27.08 lbs)?
- Tibetan macaque usually reaching 10.6 kgs (23.37 lbs)
- Black-fronted duiker usually reaching 14.44 kgs (31.83 lbs)
- Red-flanked duiker usually reaching 12.06 kgs (26.59 lbs)
- Beira (antelope) usually reaching 10.91 kgs (24.05 lbs)
- Crested porcupine usually reaching 13.4 kgs (29.54 lbs)
- Ground pangolin usually reaching 11.92 kgs (26.28 lbs)
- Tenkile usually reaching 9.98 kgs (22 lbs)
- Klipspringer usually reaching 13.46 kgs (29.67 lbs)
- Black-shanked douc usually reaching 10.33 kgs (22.77 lbs)
- Iberian lynx usually reaching 11.08 kgs (24.43 lbs)
Animals with the same size as a Proboscis monkey
Also reaching around 64.7 cm (2′ 2″) in size do these animals:
- Western red colobus gets as big as 57.4 cm (1′ 11″)
- Black-shanked douc gets as big as 60.9 cm (2′ 0″)
- Bobcat gets as big as 69.1 cm (2′ 4″)
- Spotted-necked otter gets as big as 59.7 cm (2′ 0″)
- Bengal fox gets as big as 52.3 cm (1′ 9″)
- Bay cat gets as big as 55 cm (1′ 10″)
- Salt’s dik-dik gets as big as 59.5 cm (2′ 0″)
- Dingiso gets as big as 67.4 cm (2′ 3″)
- Black-and-white ruffed lemur gets as big as 54.7 cm (1′ 10″)
- Masked palm civet gets as big as 63.4 cm (2′ 1″)