Endangered
Dusky leaf monkey
Trachypithecus obscurus
Dusky leaf monkey is an Old World monkey in the family Cercopithecidae (order Primates) — Trachypithecus obscurus, recorded as Endangered.
Appearance
The dusky leaf monkey can appear in different colour variations, depending on the sub-species. While dusky leaf monkeys are born with an orange coat, the colour of their fur changes as they mature into adulthood. Along the abdominal area, their fur is often several shades lighter than that of their dorsal area, that can develop in shades of brown, black, or grey.
J Burton, the average weight of the 25 male dusky leaf monkeys that were sampled was 7.39 kilograms, while that of the 44 female dusky leaf monkeys that were sampled was 6.47 kilograms.
Range and habitat
The dusky leaf monkey can be found across Malaysia, Myanmar, and Thailand, where they inhabit tropical forests. 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.
Research conducted within the country between 2019 and 2020 revealed that three dusky leaf monkey individuals were located in August 2019 within the northern region of the island, near the body of water that borders Singapore and Malaysia.
Pins are Wikidata “endemic to” fields. Orange dots, when present, are GBIF occurrence tiles — survey bias included.
Diet
The sampled primates also allocated their time allo-grooming (4%), playing (2%), and foraging (1%).
In crisis
According to the IUCN, the dusky leaf monkey's population is declining due to habitat loss, poaching, and anthropogenic land use, that prompted the IUCN to classify the species as endangered in 2015. As of 2015, the dusky leaf monkey is listed as an endangered species in the IUCN Red List. Notably, anthropogenic land-use within Southeast Asian forests have resulted in the endangerment of the dusky leaf monkey's natural habitat, resulting in noticeable population declines.
Even so, the dusky leaf monkey also faces other threats brought on through anthropogenic activities and the introduction of predators within their habitat. Notably, domesticated dog packs have been reported to hunt and kill the dusky leaf monkey.
CITES lists this taxon on Appendix II. Confirm the current appendix on the CITES checklist.
Dusky leaf monkey is Endangered on this catalog because that is the IUCN category stored on Wikidata. Confirm the official criteria and any later count on iucnredlist.org.
Sources
Written for this catalog from the English Wikipedia article on Dusky leaf monkey, Wikidata item Q1144328. Family and order context is original field-guide writing about the group, not a copied assessment of this one species. Wikipedia text is CC BY-SA. Not an IUCN assessment. Counts, when quoted, can change — confirm them on the recovery programme and on iucnredlist.org.
