CreatureData

Dusky leaf monkey

Trachypithecus obscurus (Reid, 1837)

ENEndangeredprimates

The dusky leaf monkey (Trachypithecus obscurus) is a species in the family Cercopithecidae, order Primates. Recorded adults weigh 6.25 kg to 8.03 kg and live up to 33.8 years. Its IUCN Red List status is Endangered.

Dusky leaf monkey (Trachypithecus obscurus)
Photo: JJ Harrison ( https://www.jjharrison.com.au/ ) · CC BY 3.0 · Wikimedia Commons

Quick facts about the dusky leaf monkey

Weight
6.25 kg – 8.03 kgsrc for Weight
Length
Not recorded
Lifespan
33.8 yearssrc for Lifespan
Diet
Herbivoresrc for Diet
Longest recorded lifespan
33.9 years
Main food
Not recorded
Habitat
Not recorded
Gestation
147 dayssrc for Gestation
Young per litter or clutch
1src for Young per litter or clutch
Age at maturity
4 yearssrc for Age at maturity
Litters or clutches a year
0.5src for Litters or clutches a year
Active
By day (diurnal)src for Active
Lifestyle
Arborealsrc for Lifestyle
Conservation status
Endangered (IUCN)src for Conservation status
Countries on record
Not recorded

Where does the dusky leaf monkey live?

Not recorded

What is the dusky leaf monkey?

Quoted from WikipediaCC BY-SA 4.0

The dusky leaf monkey (Trachypithecus obscurus), also known as the spectacled langur or the spectacled leaf monkey, is a species of primate in the family Cercopithecidae. It is found in Peninsular Malaysia, Myanmar and Thailand, and can occasionally be found in Singapore. During the day, these small, folivorous primates divide in sub-groups and forage for vegetation and fruit throughout the tropical forests. According to the IUCN, the dusky leaf monkey's population is declining due to habitat loss, poaching, and anthropogenic land use, which prompted the IUCN to classify the species as endangered in 2015.

From the Wikipedia article “Dusky leaf monkey” (en.wikipedia.org/w/index.php?title=Dusky_leaf_monkey&oldid=1383375992), by Wikipedia contributors, licensed under CC BY-SA 4.0 (creativecommons.org/licenses/by-sa/4.0). This block is kept separate from our own text.

Is the dusky leaf monkey endangered?

The dusky leaf monkey is listed as Endangered on the IUCN Red List: it faces a very high risk of extinction in the wild.

  1. LCLeast Concern
  2. NTNear Threatened
  3. VUVulnerable
  4. ENEndangered
  5. CRCritically Endangered
  6. EWExtinct in the Wild
  7. EXExtinct

Category via Wikidata (CC0). Find the full assessment on the IUCN Red List. See all Endangered species.

How is the dusky leaf monkey classified?

  1. kingdomAnimalia
  2. phylumChordata
  3. classMammalia
  4. orderPrimates
  5. familyCercopithecidae
  6. genusTrachypithecus
  7. SpeciesTrachypithecus obscurus (Reid, 1837)

Synonyms Presbytis obscura, Semnopithecus obscurus

Other names and names in other languages (40)
  • Cantor’s dusky langurEnglish
  • Creamy-tailed dusky langurEnglish
  • Dusky langurEnglish
  • Dusky langurEnglish
  • Dusky leaf-monkeyEnglish
  • Koh Pennan dusky langurEnglish
  • Perhentian island dusky langurEnglish
  • Reid's dusky langurEnglish
  • Spectacled langurEnglish
  • Spectacled langurEnglish
  • Spectacled leaf monkeyEnglish
  • Spectacled leaf monkeyEnglish
  • Spectactled langurEnglish
  • St. Matthew island dusky langurEnglish
  • Terutau island dusky langurEnglish
  • سعدان الأوراق الغامقArabic
  • hulman tmavýCzech
  • BrillelangurDanish
  • Südliche BrillenlangurGerman
  • Rauchgrauer BlätteraffeGerman
  • Südlicher BrillenlangurGerman
  • Σκουρόχρωμο ΛανγκούρGreek
  • Langur ObscuroSpanish
  • silmälasilanguriFinnish
  • Semnopithèque ObscurFrench
  • álarcos langurHungarian
  • langur dagli occhialiItalian
  • ダスキールトンJapanese
  • 더스키루톤Korean
  • 검은잎원숭이Korean
  • 안경랑구르Korean
  • 안경잎원숭이Korean
  • Lotong CengkungMalay
  • BrillangoerDutch
  • Lutung ciemnyPolish
  • Langur-obscuroPortuguese
  • Очковый тонкотелRussian
  • ค่างแว่นถิ่นใต้Thai
  • Gözlüklü LangurTurkish
  • 鬱烏葉猴Chinese

Catalogue of LifeWikipediaiNaturalistWikidataIUCN Red List

Relatives of the dusky leaf monkey

Other species in the same genus Trachypithecus.

VU, Vulnerable
Capped langur (Trachypithecus pileatus)

Capped langur

Trachypithecus pileatus

Cercopithecidae

CompareDusky leaf monkey vs Gee's golden langurDusky leaf monkey vs François' langurDusky leaf monkey vs Phayre's leaf monkeyDusky leaf monkey vs Capped langur

Common questions

Answered only where our data holds the answer.

How big is the dusky leaf monkey?

An adult dusky leaf monkey weighs 6.25 kg – 8.03 kg, according to values recorded on Wikidata.

Is the dusky leaf monkey endangered?

The dusky leaf monkey is listed as Endangered on the IUCN Red List, meaning it faces a very high risk of extinction in the wild.

How long does the dusky leaf monkey live?

The dusky leaf monkey has a recorded lifespan of 33.8 years.

How long is the dusky leaf monkey pregnant?

The recorded gestation period is 147 days.

What kind of animal is the dusky leaf monkey?

The dusky leaf monkey (Trachypithecus obscurus) belongs to the family Cercopithecidae in the order Primates.

Sources and how to cite this page

Data as of 2026-11-11. How this page is put together.

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APA

CreatureData. (2026). Dusky leaf monkey (Trachypithecus obscurus). Retrieved from https://creaturedata.com/animals/dusky-leaf-monkey

MLA

“Dusky leaf monkey (Trachypithecus obscurus).” CreatureData, 2026, https://creaturedata.com/animals/dusky-leaf-monkey.

BibTeX
@misc{dusky_leaf_monkey_2026,
  title = {Dusky leaf monkey (Trachypithecus obscurus)},
  author = {{CreatureData}},
  year = {2026},
  url = {https://creaturedata.com/animals/dusky-leaf-monkey},
  note = {Data as of 2026-11-11}
}