Coelognathus radiatus
Silhouette: Alex Slavenko · PhyloPic
In 3 days ~30% in a week ~60%
Coelognathus radiatus, commonly known as the radiated ratsnake, copperhead rat snake, or copper-headed trinket snake, is a nonvenomous species of colubrid snake. These snakes are usually defensive in nature which makes it hard to catch or control them.
German: Strahlennatter English: Copperhead racer Copperhead rat snake Radiated rat snake Copper-headed trinket snake Thai: งูทางมะพร้าว, ngu taang mapao Myanmar: ငန်းစောင်း Laos:ງູສາ Malay: Ular Rusuk Kerbau Bengali (Bangladesh): দুধরাজ (Dudhraj), আরবালি সাপ (Arbali sap)
Vietnamese: rắn sọc dưa, rắn hổ ngựa Indonesia (Sumatra, Bangka, Borneo/Kalimantan, Java), Bali Malaysia and Brunei (Malaya and East Malaysia); Borneo, Singapore Island, Burma (Myanmar), Thailand (including Phuket), Koh Phangan
Laos, Cambodia, Vietnam, Japan (Ryukyu Islands), India (Assam, Arunachal Pradesh (Miao - Changlang district, Chessa, Chimpu, Itanagar - Papum Pare district) [A. Captain, pers. comm.]), Bangladesh, Nepal, South China (Fujian, Yunnan, Guangxi, Guangdong, Hong Kong),
Nepal Type locality: Java Barbour, Thomas (1912). Some Chinese Vertebrates: Amphibia and Reptilia... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Khao Sok National Park | 🇹🇭 Thailand |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Chattogram | 🇧🇩 Bangladesh | |
| 2 | Ho Chi Minh City | 🇻🇳 Vietnam | |
| 3 | Jakarta | 🇮🇩 Indonesia | |
| 4 | Tuen Mun | 🇨🇳 China | |
| 5 | Bangkok | 🇹🇭 Thailand | |
| 6 | Kuala Lumpur | 🇲🇾 Malaysia | |
| 7 | Guangzhou | 🇨🇳 China | |
| 8 | Hong Kong | 🇨🇳 China |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Yangon Zoological Gardens | 🇲🇲 Myanmar (Burma) | |
| 2 | Chiang Mai Zoo | 🇹🇭 Thailand | |
| 3 | Safari Madrid | 🇪🇸 Spain | |
| 4 | Yaroslavl Zoo | 🇷🇺 Russia | |
| 5 | Warsaw Zoo | 🇵🇱 Poland | |
| 6 | Saigon Zoo and Botanical Gardens | 🇻🇳 Vietnam | |
| 7 | Zoo d'Amnéville | 🇫🇷 France | |
| 8 | Crocodile Farm | 🇹🇭 Thailand | |
| 9 | Central Park Zoo | 🇺🇸 United States | |
| 10 | Macau Zoo | 🇲🇴 Macao SAR China | |
| 11 | Siam Serpentarium | 🇹🇭 Thailand | |
| 12 | Snake Farm of Queen Saovabha Memorial Institute | 🇹🇭 Thailand | |
| 13 | Zoo Samara | 🇷🇺 Russia | |
| 14 | Aquarium d'Amnéville | 🇫🇷 France | |
| 15 | herpetarium warszawskiego ZOO | 🇵🇱 Poland | |
| 16 | Reptiland | 🇫🇷 France | |
| 17 | akwarium warszawskiego ZOO | 🇵🇱 Poland |
With luck
About 10% of wildlife watchers report a Copperhead Rat Snake sighting in Khao Sok National Park on a given day, based on 7 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 43rd most-seen of the 44 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.
October and December–March
In those months about 20% of wildlife watchers report a Copperhead Rat Snake in Khao Sok National Park on a given day, against under 5% in April–September and November, the lowest months.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Copperhead Rat Snake sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Khao Sok National Park, in our data
Khao Sok National Park is the only park on Wallace's Line with enough records to rate Copperhead Rat Snake sightings: about 10% of wildlife watchers there report one on a given day.
Same family: Colubridae
The closest relatives of the Copperhead Rat Snake that you can see in Khao Sok National Park (family Colubridae, Colubrid Snakes) are Western Mangrove Cat Snake (about 50%), Banded Keelback (about 40%) and Red-tailed Green Ratsnake (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Copperhead Rat Snake is recorded against all the reptiles logged in Khao Sok National Park (7 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.
