Leptomantis harrissoni
Silhouette: Jose Carlos Arenas-Monroy · PhyloPic
In 3 days ~30% in a week ~50%
Leptomantis harrissoni, common name Harrisson's flying frog or brown tree frog, is a species of frog in the family Rhacophoridae. It is endemic to northern Borneo. This species is widely distributed in northern Borneo and occurs in Sarawak and Sabah (Malaysia), Brunei, and northern Kalimantan (Indonesia).
Its natural habitat is primary or old secondary lowland rainforests in both flat and hilly terrain below 350 m of elevation. It is threatened by habitat loss. Leptomantis harrissoni can reach a length of about 50 millimetres (2.0 in) in males, of about 70 millimetres (2.8 in) in females. These medium-sized frogs have an angular and pointed snout and well developed dark hand webbing. They are basically brown.
Tadpoles can reach a length of about 40 millimetres (1.6 in), They have a well developed and rather pointed tail fin, an ovoid body and a short snout. The basic color is dark brown. Leptomantis harrissoni spends most of its life high up in the forest. Males call for breeding in water-containing holes located in the trunks of trees. Eggs are laid in a foam nest attached to the bark above said tree holes.
These frogs... Wikipedia →
Recording
Malaysia · 2019
© Marc Anderson · Xeno · CC BY-NC-ND 4.0
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Danum Valley Conservation Area | 🇲🇾 Malaysia | |
| 2 | Kinabatangan Wildlife Sanctuary | 🇲🇾 Malaysia |
With luck
About 10% of wildlife watchers report a Brown Tree Frog sighting in Kinabatangan Wildlife Sanctuary on a given day, based on 5 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 17th most-seen of the 20 amphibians we can rate there. Over three days the chance rises to about 30%, and over a week to about 50%, if each day is a fresh chance.
March and December
In those months about 20% of wildlife watchers report a Brown Tree Frog in Kinabatangan Wildlife Sanctuary on a given day, against under 5% in January–February, April–May, July and September–November, the lowest months.
Between 1 and 4 pm
Across all the parks we cover, that three-hour window holds the most Brown Tree Frog sightings with a recorded time, and about 7 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
2nd of 2
Of the 2 parks where we can rate Brown Tree Frog sightings, Kinabatangan Wildlife Sanctuary ranks 2nd at about 10%. The best odds are in Danum Valley Conservation Area (Malaysia, about 30%).
Same family: Rhacophoridae
The closest relatives of the Brown Tree Frog that you can see in Kinabatangan Wildlife Sanctuary (family Rhacophoridae, Old World Tree Frogs) are Chasen's Frilled Tree Frog (about 30%), Harlequin Tree Frog (about 30%) and Brown-Striped Tree Frog (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Brown Tree Frog is recorded against all the amphibians logged in Kinabatangan Wildlife Sanctuary (5 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.
