Quick answer
IUCN status: VulnerableSilvered Leaf Monkey at a glance
The Silvered Leaf Monkey (Trachypithecus cristatus) is a mammal in the family Cercopithecidae. In Indonesia, observation records come mainly from North Sumatra, South Sumatra, Central Kalimantan. Diet: leaf-eater (folivore), mainly young leaves; a herbivore. IUCN Red List status: Vulnerable. It is a legally protected species in Indonesia (Regulation P.106/2018).
| Scientific name | Trachypithecus cristatus |
|---|---|
| Indonesian name | Lutung Kelabu |
| Group | Mammals |
| Family | Cercopithecidae |
| Observation records | North Sumatra, South Sumatra, Central Kalimantan |
| Linked habitats | Mangroves, Freshwater Wetlands |
| Taxonomic group | Primates |
| GBIF records | 272 human-observation records, 2016–2026 |
| Data retrieved | 2026-09-23 |
| IUCN status | Vulnerable · IUCN Red List (via GBIF) · checked 1 October 2026 |
| Legal protection in Indonesia | Protected · Regulation P.106/2018 · annex no. 28 |
| Diet type | Herbivore (plant-eater) — leaf-eater (folivore), mainly young leaves · Animal Diversity Web |
| Reproduction | Giving birth to live young (viviparous) · Animal Diversity Web |
| Observance days | Indonesian Primate Day (30 January) |
| Active | Diurnal (active by day) · EltonTraits 1.0 (Wilman et al. 2014, Ecology 95:2027), MamFuncDat.txt |
In this guide (13)
What is the Silvered Leaf Monkey?
Silvered Leaf Monkey refers to Trachypithecus cristatus, in the genus Trachypithecus, family Cercopithecidae, and order Primates. The scientific name follows the accepted taxon in the GBIF Backbone Taxonomy. Common names can vary between places; the scientific name distinguishes this species from relatives.
What is known about the Silvered Leaf Monkey?
Silvered leaf monkeys use coastal, mangrove and riverine forest; presence at one site cannot stand for their status across Borneo or Sumatra.
Read that fact alongside the scientific name and species source, not as proof from an unclear photograph. Populations, ages and taxonomic limits can differ; when identification is uncertain, record the broader group.
Evidence: Species account — background reading ↗
Habitat and field observations of the Silvered Leaf Monkey
Silvered leaf monkeys are recorded from coastal, mangrove, swamp and riverine forests in Sumatra and Borneo. Species-level diet details in the cited treatment are limited; figures from other langurs should not be transferred.
Evidence: GBIF species treatments — natural-history accounts ↗
How many Indonesian records name the Silvered Leaf Monkey?
When checked on 2026-09-23, the GBIF search returned 272 human-observation records from Indonesia under this species name for 2016–2026. That is a count of indexed records, not an estimate of population, abundance or unique individuals. Observation effort can vary by location, and the count may change as records are added or identifications revised.
Evidence: GBIF occurrence search — Indonesia, human observations, 2016–2026 ↗
Where were observations reported?
Place labels appearing in the results include North Sumatra, South Sumatra, Central Kalimantan. They are labels attached to records, not a complete range map or evidence that the species occurs only there. Some labels may be broad or inconsistent. Check the underlying records before using the location information for field decisions.
Evidence: GBIF occurrence search — Indonesia, human observations, 2016–2026 ↗
How can you observe the Silvered Leaf Monkey?
Watch from a distance, do not feed, and avoid sharing precise locations of vulnerable dens or resting sites. Do not try to catch or touch wild mammals. A well-documented sighting helps others check the identification without turning one encounter into a conservation-status claim.
Explore related animals
To explore this group further, compare Silvered Leaf Monkey with Javan Lutung, Sumatran Surili, Moor Macaque. These links reflect a shared genus, family, order, class or catalogue group; taxonomic proximity does not imply identical habitat needs or conservation status.
Explore related habitats
These habitat relationships are supported by species sources in this guide. This is not a complete range map.
Scientific classification of the Silvered Leaf Monkey
| Kingdom | Animalia |
|---|---|
| Phylum | Chordata |
| Class | Mammalia |
| Order | Primates |
| Family | Cercopithecidae |
| Genus | Trachypithecus |
| Species | Trachypithecus cristatus |
Source: GBIF Backbone Taxonomy, adjusted to the ranks commonly used in school biology (for example class Reptilia).
Common questions about the Silvered Leaf Monkey
What is the scientific name of the Silvered Leaf Monkey?
The scientific name of the Silvered Leaf Monkey is Trachypithecus cristatus, in the family Cercopithecidae and the order Primates. In Indonesian it is called Lutung Kelabu.
What kind of animal is the Silvered Leaf Monkey?
The Silvered Leaf Monkey is a mammal in the family Cercopithecidae. By diet it is a herbivore (plant-eater): a leaf-eater (folivore), mainly young leaves.
Where does the Silvered Leaf Monkey live in Indonesia?
Observation records of the Silvered Leaf Monkey summarised in this guide mainly come from North Sumatra, South Sumatra, Central Kalimantan. That list is not a complete range map.
Source-supported habitats: Mangroves, Freshwater Wetlands.
What does the Silvered Leaf Monkey eat?
The Silvered Leaf Monkey is a leaf-eater (folivore), mainly young leaves. That makes it a herbivore (plant-eater). Source: Animal Diversity Web.
How does the Silvered Leaf Monkey reproduce?
The Silvered Leaf Monkey reproduces by giving birth to live young (viviparous). Source: Animal Diversity Web.
Is the Silvered Leaf Monkey nocturnal?
The cited source records the Silvered Leaf Monkey as diurnal (active by day). Source: EltonTraits 1.0 (Wilman et al. 2014, Ecology 95:2027), MamFuncDat.txt.
See also the list of nocturnal and diurnal animals in Indonesia.
What is the scientific classification of the Silvered Leaf Monkey?
Scientific classification of the Silvered Leaf Monkey: kingdom Animalia, phylum Chordata, class Mammalia, order Primates, family Cercopithecidae, genus Trachypithecus, species Trachypithecus cristatus.
Source: GBIF Backbone Taxonomy, adjusted to the ranks commonly used in school biology.
Is the Silvered Leaf Monkey endangered?
Yes. On the IUCN Red List, the Silvered Leaf Monkey is listed as Vulnerable: it is considered to face a high risk of extinction in the wild. Source: IUCN Red List (via GBIF), checked 1 October 2026.
This global category is separate from national legal protection. Is the Silvered Leaf Monkey protected in Indonesia?
Is the Silvered Leaf Monkey protected in Indonesia?
Yes. The Silvered Leaf Monkey (Trachypithecus cristatus) is a protected species in Indonesia under Environment and Forestry Ministerial Regulation No. P.106/MENLHK/SETJEN/KUM.1/12/2018 on protected plant and animal species (annex, entry 28).
Article 21(2) of Law No. 5 of 1990, as amended by Law No. 32 of 2024, prohibits anyone from hunting, catching, injuring, killing, storing, owning, keeping, transporting or trading a protected animal, alive or dead, including its body parts, eggs and nests.
If you see this animal being traded, kept or injured, contact the local BKSDA office.
Can the Silvered Leaf Monkey be kept as a pet?
No. Because the Silvered Leaf Monkey is a protected species, catching, owning, keeping, transporting or trading it without a permit is prohibited by law. Trading without a permit through electronic media is also prohibited.
If you see this animal for sale or being kept, report it to the local BKSDA office.
Sources & references
- GBIF Backbone Taxonomy — accepted taxon ↗
- GBIF occurrence search — Indonesia, human observations, 2016–2026 ↗
- GBIF species treatments — natural-history accounts ↗
- iNaturalist — exact species taxon and community observations ↗
- Species account — background reading ↗
- Peraturan Menteri LHK Nomor P.106/MENLHK/SETJEN/KUM.1/12/2018 tentang Jenis Tumbuhan dan Satwa yang Dilindungi ↗
- Animal Diversity Web ↗
- Animal Diversity Web ↗
- EltonTraits 1.0 (Wilman et al. 2014, Ecology 95:2027), MamFuncDat.txt ↗
- GBIF Backbone Taxonomy (GBIF) ↗
- IUCN Red List of Threatened Species, version 2026-1, via GBIF (CC BY 4.0) ↗
References can change. Check dates and context in the original source. How we use sources and data →
National parks where it is recorded
According to the official national park profiles from the KSDAE directorate. The animal may also live elsewhere.
Related causes and news
Cite this page
Credit PanduanHewan when referring to this page. Check the original evidence sources before reusing a claim.
PanduanHewan. Silvered Leaf Monkey (Trachypithecus cristatus). Last substantive update: 1 October 2026. https://panduanhewan.org/en/species/trachypithecus-cristatus/