Chalcorana eschatia
Silhouette: Michael Scroggie, from original photograph by John Bettaso, USFWS (original photograph in public domain). · PhyloPic
In 3 days ~90% in a week >90%
Chalcorana eschatia is a species of "true frog" in the family Ranidae. It is known from southern Thailand, but is likely to be more widespread. It was split off from Chalcorana chalconota (then Rana chalconota) by Robert Inger and colleagues in 2009, along with a number of other species in so-called "Rana chalconota group". The specific name eschatia, derived from the Greek word for "outskirt", refers to distribution of this species being at the edge of the geographical range of the group.
Chalcorana eschatia are moderate-sized frogs: adult males measure 31–40 mm (1.2–1.6 in) and females 43–57 mm (1.7–2.2 in) in snout–vent length. Body is slender and legs are long. The snout is obtusely pointed, but rounded in profile. The tympanum is distinct, slightly larger in males than in females. The outer fingers have large discs; no webbing is present but the middle fingers have sin folds. The toe tips have discs that are smaller than the fingers ones. The webbing between the toes is extensive. Dorsal skin is granular. Preserved specimens are dark brown dorsally and on the sides; no black spots are present. The venter is whitish or cream-colored, sometimes with round dark spots... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Khao Sok National Park | 🇹🇭 Thailand | |
| 2 | Khao Luang National Park | 🇹🇭 Thailand |
Likely
About 50% of wildlife watchers report a Northern White-lipped Frog sighting in Khao Sok National Park on a given day, based on 80 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the most-seen of the 21 amphibians we can rate there. Over three days the chance rises to about 90%, and over a week to over 90%, if each day is a fresh chance.
September and November
In those months about 80% of wildlife watchers report a Northern White-lipped Frog in Khao Sok National Park on a given day, against about 30% in April, the lowest month. Those are among Khao Sok National Park's wettest months, with about 240 mm of rain a month against 35 mm in February.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most Northern White-lipped 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.
Yes
Of the 2 parks where we can rate Northern White-lipped Frog sightings, Khao Sok National Park has the highest daily chance: about 50%. Next come Khao Luang National Park (Thailand, about 30%).
Same family: Ranidae
The closest relatives of the Northern White-lipped Frog that you can see in Khao Sok National Park (family Ranidae, Typical Frogs) are Penelope's Hill Frog (about 40%), Green Paddy Frog (about 30%) and Poisonous Rock Frog (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Northern White-lipped Frog is recorded against all the amphibians logged in Khao Sok National Park (80 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.
