Cyclemys oldhami
Silhouette: SeismicShrimp · PhyloPic
In 3 days ~60% in a week ~90%
Oldham's leaf turtle (Cyclemys oldhamii) is a species of turtle in the family Geoemydidae. The species is native to southeast Asia. As many as three subspecies are sometimes recognized as being valid. Both the specific name, oldhamii, and the common name, Oldham's leaf turtle, are in honor of Thomas Oldham, Superintendent of the Geological Survey of India. The generic name Cyclemys comes from the Greek κύκλος (kyklos, meaning "round" or "circle", referring to the shape of the carapace) and εμύς (emys, meaning "freshwater turtle").
Cyclemys oldhamii is found in Bangladesh, in the terai of mizoram, in Myanmar, Thailand, Vietnam, West Borneo, Sumatra and Java. In addition, Cyclemys oldhamii shanensis – sometimes considered a distinct species due to its shell pattern, oft described as looking similar to aged meat – occurs from central Myanmar to Thailand and Cambodia. The type locality was originally given as "Mergui and Siam", and restricted to Mergui by Smith (1931).
In Germany, a case of hybridization between a male Cyclemys shanensis and a female Chinese stripe-necked turtle (Mauremys sinensis) has been described... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Khao Yai National Park | 🇹🇭 Thailand | |
| 2 | Kaeng Krachan National Park | 🇹🇭 Thailand |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Columbus Zoo and Aquarium | 🇺🇸 United States |
Possible
About 30% of wildlife watchers report an Oldham's Leaf Turtle sighting in Khao Yai National Park on a given day, based on 35 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 12th most-seen of the 46 reptiles we can rate there. Over three days the chance rises to about 60%, and over a week to about 90%, if each day is a fresh chance.
January and March
In those months about 40% of wildlife watchers report an Oldham's Leaf Turtle in Khao Yai National Park on a given day, against under 5% in April to July, the lowest months. Those are among Khao Yai National Park's driest months, with about 55 mm of rain a month against 330 mm in September.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Oldham's Leaf Turtle 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 Oldham's Leaf Turtle sightings, Khao Yai National Park has the highest daily chance: about 30%. Next come Kaeng Krachan National Park (Thailand, about 10%).
Same family: Geoemydidae
The closest relatives of the Oldham's Leaf Turtle that you can see in Khao Yai National Park (family Geoemydidae, Eurasian Pond, River, and Neotropical Wood Turtles) are Yellow-headed Temple Turtle (about 40%) and Giant Asian Pond Turtle (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Oldham's Leaf Turtle is recorded against all the reptiles logged in Khao Yai National Park (35 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.
