Cyclemys oldhami
Silhouette: SeismicShrimp · PhyloPic
In 3 days ~30% in a week ~60%
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 |
No species of the same family or order lives in Kaeng Krachan National Park, so these are its closest relatives here: other reptiles.
With luck
About 10% of wildlife watchers report an Oldham's Leaf Turtle sighting in Kaeng Krachan National Park on a given day, based on 16 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 27th most-seen of the 56 reptiles we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
September
In that month about 30% of wildlife watchers report an Oldham's Leaf Turtle in Kaeng Krachan National Park on a given day, against under 5% in May, August and November, the lowest months. That is one of Kaeng Krachan National Park's wettest months, with about 260 mm of rain against 30 mm in December.
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.
2nd of 2
Of the 2 parks where we can rate Oldham's Leaf Turtle sightings, Kaeng Krachan National Park ranks 2nd at about 10%. The best odds are in Khao Yai National Park (Thailand, about 30%).
GBIF citizen-science records
It is estimated from how often the Oldham's Leaf Turtle is recorded against all the reptiles logged in Kaeng Krachan National Park (16 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.
