Sumatra Slow Loris
Nycticebus hilleri
- KingdomAnimalia (Animals)
- PhylumChordata (Chordates)
- ClassMammalia (Mammals)
- OrderPrimates
- FamilyLorisidae (Lorises and Pottos)
- GenusNycticebus (Slow Lorises)
- SpeciesNycticebus hilleri (Sumatra Slow Loris)
About the Sumatra Slow Loris
The Sumatran slow loris (Nycticebus hilleri) is a strepsirrhine primate and a species of slow loris that is native to Sumatra. While this species used to be considered a junior synonym of the Sunda slow loris, it is now recognized by the IUCN as a full species. This species is named after Hiram M. Hiller Jr., who collected the holotype of this species while exploring the East Indies in 1901. Wikipedia →
Closest Relatives at Gunung Leuser National Park
Sumatran Orangutan
Pongo abelii
Thomas’s Langur
Presbytis thomasi
Crab-eating Macaque
Macaca fascicularis
Southern Pig-tailed Macaque
Macaca nemestrina
Lar Gibbon
Hylobates lar
Silvered Leaf Monkey
Trachypithecus cristatus
Siamang
Symphalangus syndactylus
Black Sumatran Langur
Presbytis sumatrana
Global Distribution
Where this species is recorded worldwide. Restricted to human observations from 2019 onwards — the same kind of record and the same period the probabilities on this page are built from, so collar-tracking studies, camera-trap arrays and museum specimens are excluded. Around Santa Rosa that removes 5,924 GPS fixes from a handful of tagged jaguars.
where this species is recorded (GBIF density — it tracks where observers go, not how likely a sighting is) · parks where it occurs — tap a pin for the sighting probability there
Parks Where Found
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Gunung Leuser National Park | 🇮🇩 Indonesia |
More parks will be added in future updates.
Quick answers
What are the chances of seeing a Sumatra Slow Loris in Gunung Leuser National Park?
About 20% of wildlife watchers report a Sumatra Slow Loris sighting in Gunung Leuser National Park, based on 8 verified sightings from GBIF citizen-science data.
When is the best time to see Sumatra Slow Loris in Gunung Leuser National Park?
April has the highest sighting rate for Sumatra Slow Loris in Gunung Leuser National Park in our monthly data.