Rhacophorus borneensis
Silhouette: PhyloPic
In 3 days ~30% in a week ~60%
Rhacophorus borneensis is a species of frog in the family Rhacophoridae. This recently (2013) described species is endemic to Malaysian Borneo where it is known from its type locality in the Maliau Basin Conservation Area, Sandakan Division, Sabah as well as from the Batang Ai National Park, Sarawak. Prior to its description, it was included in Rhacophorus reinwardtii. It is said to be "one of the prettiest frogs of Borneo". Common name Borneo flying frog has been coined for it.
The type series consists of an adult male and female in amplexus. The male measured 51 mm (2.0 in) in snout–vent length (SVL) and the female 62 mm (2.4 in). Literature records for Bornean "Rhacophorus reinwardtii", likely representing this species, give a range 46–55 mm (1.8–2.2 in) for males and 56–65 mm (2.2–2.6 in) for females.
The body is dorsoventrally compressed. The snout is rounded dorsally and sloping downwards in profile. The eyes are large and protuberant. The canthus is distinct and blunt. The tympanum is distinct and subcircular; the supra-tympanic fold is oblique. The fingers and toes have large discs and are broadly webbed. The dorsum is smooth and uniformly green, although some... Wikipedia →
Recording1:10
Malaysia · 2019
© Matt Clancy · iNaturalist · CC BY-NC 4.0
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Kinabalu Park | 🇲🇾 Malaysia |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Borneo Flying Frog sighting in Kinabalu Park on a given day, based on 7 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 36th most-seen of the 40 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.
August
In that month about 40% of wildlife watchers report a Borneo Flying Frog in Kinabalu Park on a given day, against under 5% in September to July, the lowest months.
Between 7 and 10 pm
Across all the parks we cover, that three-hour window holds the most Borneo Flying Frog sightings with a recorded time, and about 9 in 10 of them come between 6 pm and 6 am: it is mostly seen at night.
Only Kinabalu Park, in our data
Kinabalu Park is the only park on Wallace's Line with enough records to rate Borneo Flying Frog sightings: about 10% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Borneo Flying Frog is recorded against all the amphibians logged in Kinabalu Park (7 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.
