How big does a Pig-tailed langur get? Here is an overview over the average adult age:
A grown Pig-tailed langur (Simias concolor) reaches an average size of 49.9 cm (1′ 8″).
When born, they have an average size of 0 cm (0′ 0″). A full-grown exemplary reaches roughly 7.39 kg (16.3 lbs). A Pig-tailed langur has 1 babies at once. The Pig-tailed langur (genus: Simias) is a member of the family Cercopithecidae.
As a reference: Humans reach an average body size of 1.65m (5′ 5″) while carrying 62 kg (137 lbs). A human woman is pregnant for 280 days (40 weeks) and on average become 75 years old.

The pig-tailed langur (Simias concolor), monotypic in genus Simias, is a large Old World monkey, endemic to several small islands off the coast of Sumatra in Indonesia. Its face is black, its fur is blackish-brown and it has a relatively short tail. It is a diurnal species, feeding in small groups in the rainforest canopy on leaves, and to a lesser extent, fruit and berries. Little is known of its natural history, but it is heavily hunted, its populations have been declining rapidly and the International Union for Conservation of Nature has assessed its conservation status as being “critically endangered”. It has been included on a list of the World’s 25 Most Endangered Primates.
Animals of the same family as a Pig-tailed langur
We found other animals of the Cercopithecidae family:
- Lesser spot-nosed monkey with a size of 41 cm (1′ 5″)
- Proboscis monkey with a size of 64.7 cm (2′ 2″)
- François’ langur with a size of 58.9 cm (2′ 0″)
- King colobus with a size of 62.7 cm (2′ 1″)
- Purple-faced langur with a size of 58.5 cm (2′ 0″)
- Western red colobus with a size of 57.4 cm (1′ 11″)
- Angolan talapoin with a size of 35.5 cm (1′ 2″)
- Stump-tailed macaque with a size of 60 cm (2′ 0″)
- Crested mona monkey with a size of 45.9 cm (1′ 7″)
- Black crested mangabey with a size of 51 cm (1′ 9″)
Animals with the same size as a Pig-tailed langur
Not that size really matters, but it makes things comparable. So here are a couple of animals that are as big as Pig-tailed langur:
- Yellow-throated marten with a size of 55 cm (1′ 10″)
- White-cheeked spider monkey with a size of 46 cm (1′ 7″)
- Stein’s cuscus with a size of 42.4 cm (1′ 5″)
- Pallas’s cat with a size of 57.6 cm (1′ 11″)
- Spotted-necked otter with a size of 59.4 cm (2′ 0″)
- Northern common cuscus with a size of 42.4 cm (1′ 5″)
- Ground cuscus with a size of 45.4 cm (1′ 6″)
- Rusty-spotted cat with a size of 40.6 cm (1′ 4″)
- Philippine porcupine with a size of 54.2 cm (1′ 10″)
- Korean hare with a size of 46.5 cm (1′ 7″)
Animals with the same litter size as a Pig-tailed langur
Here is a list of animals that have the same number of babies per litter (1) as a Pig-tailed langur:
- Siberian musk deer
- Southern tree hyrax
- Indiana bat
- Nilgiri langur
- Grant’s gazelle
- White-bellied free-tailed bat
- Roe deer
- Lesser Asiatic yellow bat
- Eastern lesser bamboo lemur
- Gray-bellied night monkey
Animals with the same weight as a Pig-tailed langur
As a comparison, here are some other animals that weight as much as the Simias concolor:
- Neotropical otter with a weight of 6.55 kilos (14.44 lbs)
- Koala with a weight of 6.55 kilos (14.44 lbs)
- Jaguarundi with a weight of 6.88 kilos (15.17 lbs)
- Dusky leaf monkey with a weight of 7.18 kilos (15.83 lbs)
- Geoffroy’s spider monkey with a weight of 7.6 kilos (16.76 lbs)
- Red-faced spider monkey with a weight of 8.7 kilos (19.18 lbs)
- Peruvian spider monkey with a weight of 7.09 kilos (15.63 lbs)
- Mentawai langur with a weight of 6.45 kilos (14.22 lbs)
- Tana River red colobus with a weight of 8.03 kilos (17.7 lbs)
- Lumholtz’s tree-kangaroo with a weight of 6.65 kilos (14.66 lbs)
