Loris tardigradus
Silhouette: Kai Caspar · PhyloPic
In 3 days ~30% in a week ~60%
The red slender loris (Loris tardigradus) is a small, nocturnal strephsirrhine primate native to the rainforests of Sri Lanka. This is No. 6 of the 10 focal species and No. 22 of the 100 EDGE mammal species worldwide considered the most evolutionarily distinct and globally endangered.
The taxonomy of slender lorises in Sri Lanka has undergone significant revision. Early classifications recognized multiple subspecies. A pivotal review split them into two species: the small, red wet-zone endemic Loris tardigradus and the larger, greyish Loris lydekkerianus found in India and parts of Sri Lanka. Genetic and morphological studies later supported this split.
Three subspecies of this species are recognized: Northwestern red slender loris (Loris tardigradus ssp. parvus) - CR - Restricted to the northwestern wet and intermediate zones north of the Kelani River in the Western Province. Localities include Henarathgoda, Meerigama Kanda, Pilikuttuwa, and Horagolla.
Southwestern... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sinharaja Forest Reserve | 🇱🇰 Sri Lanka |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Red Slender Loris sighting in Sinharaja Forest Reserve on a given day, based on 8 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 8th most-seen of the 8 mammals we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
January and February
In those months about 20% of wildlife watchers report a Red Slender Loris in Sinharaja Forest Reserve on a given day, against under 5% in May to December, the lowest months. Those are among Sinharaja Forest Reserve's driest months, with about 160 mm of rain a month against 490 mm in November.
Between 7 and 10 pm
Across all the parks we cover, that three-hour window holds the most Red Slender Loris sightings with a recorded time, and about 7 in 10 of them come between 6 pm and 6 am: it is most active around dawn and dusk.
Only Sinharaja Forest Reserve, in our data
Sinharaja Forest Reserve is the only park on Wallace's Line with enough records to rate Red Slender Loris sightings: about 10% of wildlife watchers there report one on a given day.
Same order: Primates
The closest relatives of the Red Slender Loris that you can see in Sinharaja Forest Reserve (order Primates) are Purple-faced Lutung (about 50%) and Toque Macaque (about 40%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Red Slender Loris is recorded against all the mammals logged in Sinharaja Forest Reserve (8 verified sightings from 2019 to 2026), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
