Ansonia leptopus
In 3 days ~80% in a week >90%
Ansonia leptopus is a species of toad in the family Bufonidae. It is known from a few lowland localities in Borneo (including Brunei), Sumatra (Indonesia), and Peninsular Malaysia; it is reported as common in lowland Malaysian Borneo. Its presence in Peninsular Malaysia is uncertain. Its common names are brown slender toad, Matang stream toad, and cricket-voiced toad.
Males measure 30–40 mm (1.2–1.6 in) and females to 55 mm (2.2 in) in snout–vent length. There are low warts on the dorsum and brown or yellow spines under the mandible. Males have dark brown nuptial pads. The tadpoles are small (<20 mm (0.79 in)) and have unusual black markings on a light background. Compared to other Ansonia tadpoles, the oral sucker is less well-developed.
The species' natural habitat is primary rainforest. Adults occur widely dispersed on the forest floor and herb stratum. Calling males can be found sitting on boulders and rocks on river banks at night. Breeding is explosive and takes place in small, clear, rocky-bottomed streams. The tadpoles are most common in shallow side pools and in submerged beds of dead leaves.
It is threatened by habitat loss...
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Kubah National Park | 🇲🇾 Malaysia |
More parks will be added in future updates.
Likely
About 40% of wildlife watchers report a Brown Slender Toad sighting in Kubah National Park on a given day, based on 31 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 16th most-seen of the 41 amphibians we can rate there. Over three days the chance rises to about 80%, and over a week to over 90%, if each day is a fresh chance.
August
In that month about 60% of wildlife watchers report a Brown Slender Toad in Kubah National Park on a given day, against under 5% in July, the lowest month.
Between 8 and 11 pm
Across all the parks we cover, that three-hour window holds the most Brown Slender Toad 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 Kubah National Park, in our data
Kubah National Park is the only park on Wallace's Line with enough records to rate Brown Slender Toad sightings: about 40% of wildlife watchers there report one on a given day.
Same genus: Ansonia
The closest relatives of the Brown Slender Toad that you can see in Kubah National Park (genus Ansonia, Stream Toads) are Spiny Slender Toad (about 50%) and Dwarf Slender Toad (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Brown Slender Toad is recorded against all the amphibians logged in Kubah National Park (31 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.
