Kurixalus chaseni
Silhouette: Jose Carlos Arenas-Monroy · PhyloPic
In 3 days ~30% in a week ~60%
Kurixalus chaseni, the frilled tree frog or Malay frilled tree frog, is a species of frog in the family Rhacophoridae. It is endemic to Malaysia, Indonesia, and Thailand, where it has been observed between 0 and 500 meters above sea level.
This frog has been found in forests primary forest and long-growing secondary forest. This frog is known in swampy areas with water stagnant water. Scientists believe this frog can tolerate some level of habitat disturbance. It has been seen by roadsides.
Scientists classify this frog as at least concern of extinction because of its large range, which includes protected parks, and presumed large population. What threat it faces comes from habitat loss associated with deforestation associated with forest concession and palm oil cultivation
Matsui M; Kawahara Y; Eto K; Hamidy A; Ahmad N; Hossman MYB (2018). "Distinct species status of Kurixalus chaseni (Rhacophoridae, Anura) as revealed by mitochondrial phylogeny". Alytes. 36: 170–177. Wikipedia →
Recording0:50
Malaysia · 2019
© Matt Clancy · iNaturalist · CC BY-NC 4.0
Recording
Malaysia · 2015
© Marc Anderson · Xeno · CC BY-NC-ND 4.0
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Tanjung Puting National Park | 🇮🇩 Indonesia | |
| 2 | Kinabatangan Wildlife Sanctuary | 🇲🇾 Malaysia | |
| 3 | Danum Valley Conservation Area | 🇲🇾 Malaysia | |
| 4 | Sepilok | 🇲🇾 Malaysia |
With luck
About 10% of wildlife watchers report a Chasen's Frilled Tree Frog sighting in Sepilok on a given day, based on 11 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 10th most-seen of the 18 amphibians 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 30% of wildlife watchers report a Chasen's Frilled Tree Frog in Sepilok on a given day, against under 5% in March–June, August and December, the lowest months.
Between 1 and 4 pm
Across all the parks we cover, that three-hour window holds the most Chasen's Frilled Tree Frog sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
4th of 4
Of the 4 parks where we can rate Chasen's Frilled Tree Frog sightings, Sepilok ranks 4th at about 10%. The best odds are in Tanjung Puting National Park (Indonesia, about 40%), Kinabatangan Wildlife Sanctuary (Malaysia, about 30%) and Danum Valley Conservation Area (Malaysia, about 30%).
Same family: Rhacophoridae
The closest relatives of the Chasen's Frilled Tree Frog that you can see in Sepilok (family Rhacophoridae, Old World Tree Frogs) are Brown-Striped Tree Frog (about 30%), File-eared Tree Frog (about 20%) and Harlequin Tree Frog (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Chasen's Frilled Tree Frog is recorded against all the amphibians logged in Sepilok (11 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.
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