Leptomantis angulirostris
Silhouette: Jose Carlos Arenas-Monroy · PhyloPic
In 3 days ~60% in a week ~90%
Leptomantis angulirostris, commonly known as the masked tree frog, is a member of the tree frog family Rhacophoridae and is found in Indonesia and Malaysian Borneo. Its natural habitats are subtropical or tropical moist lowland forests, subtropical or tropical moist montane forests, and rivers. It is threatened by habitat loss.
A relatively small frog, males range in length from 31–33 mm and females from 45–51 mm. The head is wider than long. Snout pointed with sharp canthus rostralis. Dilated finger and toe tips are characteristic. Webbing in feet almost complete, touching the toe pad on all digits except fourth. Webbing in hand partial with webbing reaching the second sub-articular tubercle on finger three. Skin smooth on dorsum, granulated on chest and venter. Variable in skin coloration but broadly ranges from pale grey-green to brown. Dark crossbars are common on dorsum near the vent and on legs. Sides of the body and inner surface of the legs are yellow with black blotches. Often, few fawn colored blotches are found on snout. Iris brown, often with a tinge of blue.
This species is thought be found in Sumatra and... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Kinabalu Park | 🇲🇾 Malaysia |
More parks will be added in future updates.
Possible
About 30% of wildlife watchers report a Masked Tree Frog sighting in Kinabalu Park on a given day, based on 63 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 16th most-seen of the 40 amphibians we can rate there. Over three days the chance rises to about 60%, and over a week to about 90%, if each day is a fresh chance.
January, June–July, September and November
In those months about 40% of wildlife watchers report a Masked Tree Frog in Kinabalu Park on a given day, against under 5% in March to May, the lowest months.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most Masked Tree Frog sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Kinabalu Park, in our data
Kinabalu Park is the only park on Wallace's Line with enough records to rate Masked Tree Frog sightings: about 30% of wildlife watchers there report one on a given day.
Same family: Rhacophoridae
The closest relatives of the Masked Tree Frog that you can see in Kinabalu Park (family Rhacophoridae, Old World Tree Frogs) are Mossy Bush Frog (about 50%), File-eared Tree Frog (about 40%) and Peter's Tree Frog (about 40%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Masked Tree Frog is recorded against all the amphibians logged in Kinabalu Park (63 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.
