Ansonia fuliginea
Silhouette: Michael Scroggie, from original photograph by Gary M. Stolz, USFWS (original photograph in public domain). · PhyloPic
In 3 days ~40% in a week ~70%
Ansonia fuliginea, the North Borneo stream toad or North Borneo slender toad, is a species of toad in the family Bufonidae. It is endemic to Mount Kinabalu in Sabah, Malaysian Borneo. Males measure 32–36 mm (1.3–1.4 in) and females 38–44 mm (1.5–1.7 in) in snout–vent length. The body is relatively stocky. The snout is round. The tympanum is distinct. The flanks are darker than the middle dorsum and the head. The belly is also mostly dark. There are many rounded warts on the upper surfaces; the belly is granular. The tips of fingers and toes are swollen but without disks.
The tadpoles are unknown. The species' natural habitats are moist montane and sub-alpine forests at elevations of 1,600–3,480 m (5,250–11,420 ft) above sea level—the highest of all Bornean amphibians. Adults are terrestrial; the tadpoles presumably develop in streams. This rarely encountered species occurs in the Kinabalu Park, which is well protected. Whether it occurs outside the park is unknown. Selective logging is a potential threat. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Kinabalu Park | 🇲🇾 Malaysia |
More parks will be added in future updates.
Possible
About 20% of wildlife watchers report a North Borneo Stream Toad sighting in Kinabalu Park on a given day, based on 14 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 27th most-seen of the 40 amphibians we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
September
In that month about 40% of wildlife watchers report a North Borneo Stream Toad in Kinabalu Park on a given day, against under 5% in April, August, October and December–February, the lowest months.
Between 2 and 5 am
Across all the parks we cover, that three-hour window holds the most North Borneo Stream Toad 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 Kinabalu Park, in our data
Kinabalu Park is the only park on Wallace's Line with enough records to rate North Borneo Stream Toad sightings: about 20% of wildlife watchers there report one on a given day.
Same genus: Ansonia
The closest relatives of the North Borneo Stream Toad that you can see in Kinabalu Park (genus Ansonia, Stream Toads) are Kinabalu Slender Toad (about 40%), Spiny Slender Toad (about 30%) and Long-fingered Stream Toad (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the North Borneo Stream Toad is recorded against all the amphibians logged in Kinabalu Park (14 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.
