Occidozyga martensii
Silhouette: Jose Carlos Arenas-Monroy · PhyloPic
In 3 days ~30% in a week ~50%
The round-tongued floating frog (Occidozyga martensii) is a species of frog in the family Dicroglossidae. Occidozyga magnapustulosus, distributed in scattered locations of northern Thailand and Laos, might be included within it.
Occidozyga martensii is found throughout most of Indochina. It is found in Cambodia, southern China (Yunnan, Guangxi, Guangdong, and Hainan), Laos, northern peninsular Malaysia, Thailand, Vietnam, and possibly Myanmar. Its natural habitats are subtropical or tropical moist lowland forest, rivers, intermittent rivers, swamps, freshwater marshes, intermittent freshwater marshes, ponds, irrigated land, and canals and ditches.
Amphibian and Reptiles of Peninsular Malaysia - Occidozyga martensii Wikipedia →
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Cambodia · 2026
© Ding Li Yong · XC1151732 · CC BY-NC-ND 4.0
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Thailand · 2014
© Marc Anderson · XC883134 · CC BY-NC-ND 4.0
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Thailand · 2026
© Siriwat Dangsri · iNaturalist · CC BY-NC 4.0
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cat Tien National Park | 🇻🇳 Vietnam | |
| 2 | Khao Yai National Park | 🇹🇭 Thailand |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Ho Chi Minh City | 🇻🇳 Vietnam | |
| 2 | Bangkok | 🇹🇭 Thailand |
With luck
About 10% of wildlife watchers report a Round-tongued Floating Frog sighting in Khao Yai National Park on a given day, based on 10 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 13th most-seen of the 13 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.
September
In that month about 30% of wildlife watchers report a Round-tongued Floating Frog in Khao Yai National Park on a given day, against under 5% in February–March, June–August and November–December, the lowest months. That is one of Khao Yai National Park's wettest months, with about 330 mm of rain against 15 mm in December.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most Round-tongued Floating 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.
2nd of 2
Of the 2 parks where we can rate Round-tongued Floating Frog sightings, Khao Yai National Park ranks 2nd at about 10%. The best odds are in Cat Tien National Park (Vietnam, about 40%).
Same family: Dicroglossidae
The closest relatives of the Round-tongued Floating Frog that you can see in Khao Yai National Park (family Dicroglossidae, Fork-tongued Frogs) are Khorat big-mouthed frog (about 20%), Alpine Cricket Frog (about 20%) and Capped Frog (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Round-tongued Floating Frog is recorded against all the amphibians logged in Khao Yai National Park (10 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.
