It is hard to guess what a Purple-faced langur weights. But we have the answer:
An adult Purple-faced langur (Trachypithecus vetulus) on average weights 7.53 kg (16.61 lbs).
The Purple-faced langur is from the family Cercopithecidae (genus: Trachypithecus). It is usually born with about 360 grams (0.79 lbs). They can live for up to 23 years. When reaching adult age, they grow up to 58.5 cm (2′ 0″). Usually, Purple-faced langurs 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 purple-faced langur (Semnopithecus vetulus), also known as the purple-faced leaf monkey, is a species of Old World monkey that is endemic to Sri Lanka. The animal is a long-tailed arboreal species, identified by a mostly brown appearance, dark face (with paler lower face) and a very shy nature. The species was once highly prevalent, found in suburban Colombo and the “wet zone” villages (areas with high temperatures and high humidity throughout the year, whilst rain deluges occur during the monsoon seasons), but rapid urbanization has led to a significant decrease in the population level of the monkeys. It had traditionally been classified within the lutung genus Trachypithecus but was moved to the genus Semnopithecus based on DNA evidence indicating that is it more closely related to the gray langurs.In Sinhala it is known as ශ්රී ලංකා කලු වදුරා (Sri Lanka black monkey).
Animals of the same family as a Purple-faced langur
We found other animals of the Cercopithecidae family:
- Mentawai langur bringing 6.45 kilos (14.22 lbs) to the scale
- Agile mangabey bringing 7.11 kilos (15.67 lbs) to the scale
- Campbell’s mona monkey bringing 3.63 kilos (8 lbs) to the scale
- Lion-tailed macaque bringing 6 kilos (13.23 lbs) to the scale
- Bonnet macaque bringing 5 kilos (11.02 lbs) to the scale
- Black colobus bringing 9.1 kilos (20.06 lbs) to the scale
- Nilgiri langur bringing 10.6 kilos (23.37 lbs) to the scale
- Northern plains gray langur bringing 12.64 kilos (27.87 lbs) to the scale
- Preuss’s red colobus bringing 8.87 kilos (19.55 lbs) to the scale
- Southern pig-tailed macaque bringing 7.85 kilos (17.31 lbs) to the scale
Animals with the same weight as a Purple-faced langur
As a comparison, here are some other animals that weight as much as the Trachypithecus vetulus:
- Hoolock gibbon with a weight of 6.7 kilos (14.77 lbs)
- Collared mangabey with a weight of 7.29 kilos (16.07 lbs)
- Sarcophilus laniarius with a weight of 8.35 kilos (18.41 lbs)
- Moor macaque with a weight of 7.29 kilos (16.07 lbs)
- Grey-cheeked mangabey with a weight of 7.39 kilos (16.29 lbs)
- Patas monkey with a weight of 7.99 kilos (17.61 lbs)
- North American porcupine with a weight of 7.42 kilos (16.36 lbs)
- Red-faced spider monkey with a weight of 8.7 kilos (19.18 lbs)
- Southern pig-tailed macaque with a weight of 7.85 kilos (17.31 lbs)
- Tana River mangabey with a weight of 7.08 kilos (15.61 lbs)
Animals with the same size as a Purple-faced langur
Not that size really matters, but it makes things comparable. So here are a couple of animals that are as big as Purple-faced langur:
- Patas monkey with a size of 66.5 cm (2′ 3″)
- Celebes crested macaque with a size of 54.9 cm (1′ 10″)
- Pampas fox with a size of 62.2 cm (2′ 1″)
- Ground pangolin with a size of 48.9 cm (1′ 8″)
- Hamadryas baboon with a size of 67.5 cm (2′ 3″)
- Bates’s pygmy antelope with a size of 54 cm (1′ 10″)
- Black-crested Sumatran langur with a size of 50.4 cm (1′ 8″)
- Moustached guenon with a size of 52 cm (1′ 9″)
- Black-footed mongoose with a size of 61.3 cm (2′ 1″)
- Tibetan macaque with a size of 60 cm (2′ 0″)
Animals with the same litter size as a Purple-faced langur
Here is a list of animals that have the same number of babies per litter (1) as a Purple-faced langur:
- Long-nosed potoroo
- Serotine bat
- Dama gazelle
- Asian elephant
- Long-tongued nectar bat
- Monjon
- Birdlike noctule
- Llama
- Hamlyn’s monkey
- Smaller horseshoe bat
Animals with the same life expectancy as a Purple-faced langur
Completely different animals, but becoming as old as a Purple-faced langur:
- Matschie’s tree-kangaroo with an average maximal age of 23.83 years
- Red river hog with an average maximal age of 20 years
- Tiger with an average maximal age of 26.25 years
- Banteng with an average maximal age of 26.5 years
- Desert warthog with an average maximal age of 18.75 years
- Mediterranean monk seal with an average maximal age of 23.67 years
- Galápagos fur seal with an average maximal age of 22 years
- Guatemalan black howler with an average maximal age of 20 years
- Grizzled tree-kangaroo with an average maximal age of 20 years
- White-faced saki with an average maximal age of 20.67 years