Thai National Parks

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Reptiles of Thailand

Species of Thailand

Copperhead racer

Thai: งูทางมะพร้าว, ngu taang mapao

Binomial name: Coelognathus radiatus, Heinrich Boie, 1827

The radiated ratsnake, copperhead rat snake or copper-headed trinket snake (Coelognathus radiatus) is a nonvenomous species of colubrid snake.


These snakes are generally very defensive. They are very confident in their ability to defend themselves so you must be very confident in order to remotely have a chance at controlling this species. They are also a good trainer snakes for those looking to get into cobras and other elapids.


  • Indonesia (Sumatra, Bangka, Borneo/Kalimantan, Java),
  • Malaysia and Brunei (Malaya and East Malaysia); Borneo,
  • Singapore Island,
  • Burma (Myanmar),
  • Thailand (including Phuket),
  • Laos, Cambodia, Vietnam,
  • India (Assam, Arunachal Pradesh (Miao - Changlang district, Chessa, Chimpu, Itanagar - Papum Pare district) Captain, pers. comm.),
  • Bangladesh, Nepal,
  • South China (Fujian, Yunnan, Guangxi, Guangdong, Hong Kong),
  • Nepal

Type locality: Java

This article uses material from Wikipedia released under the Creative Commons Attribution-Share-Alike Licence 3.0. Eventual photos shown in this page may or may not be from Wikipedia, please see the license details for photos in photo by-lines.

Scientific classification

Coelognathus radiatus

Common names

  • German: Strahlennatter
  • English:
    • Copperhead racer
    • Copperhead rat snake
    • Radiated rat snake
    • Copper-headed trinket snake
  • Thai: งูทางมะพร้าว, ngu taang mapao


  • Coelognathus radiatus, Van Stanley Bartholomew Wallach et al. (2014)
  • Elaphe radiatus, T.S.N. Murthy (2010)
  • Coelognathus radiata, Thomas Ziegler et al. (2007)
  • Coelognathus radiatus, Andreas Gumprecht (2003)
  • Elaphe radiata, Olivier S.G. Pauwels et al. (2003)
  • Coelognathus radiatus, Winchell (2003)
  • Coelognathus radiatus, Urs Utiger et al. (2002)
  • Elaphe radiata, Thomas Ziegler (2002)
  • Coelognathus radiatus, Andreas Gumprecht (2000)
  • Elaphe radiata, James Draper Lazell et al. (1999)
  • Elaphe radiata, Tanya Chan-Ard et al. (1999)
  • Elaphe radiata, Merel J. Cox et al. (1998)
  • Elaphe radiata, Ulrich Manthey & Wolfgang Grossmann (1997)
  • Elaphe radiata, Klaus-Dieter Schulz (1996)
  • Elaphe radiata, Malcolm Arthur Smith (1943)
  • Coelognathus radiatus, Doris Mable Cochran (1930)
  • Elaphe radiata, Clifford H. Pope (1929)
  • Elaphe radiata, Thomas Barbour (1912)
  • Coluber radiatus, Frank Wall (1908)
  • Coluber (Compsosoma) radiatus, Salomon Müller (1895)
  • Coluber radiatus, George Albert Boulenger (1894)
  • Compsosoma radiatum, Ferdinand Stoliczka (1870)
  • Elaphis radiatus, JAN (Multiple authors) (1863)
  • Spilotes radiatus, Albert Charles Lewis Günther (1858)
  • Elaphis (Compsosoma) radiatum, Pieter Bleeker (1857)
  • Compsosoma radiatum, André Marie Constant Duméril & Gabriel Bibron (1854)
  • Elaphis radiatus, André Marie Constant Duméril (1853)
  • Plagiodon radiata, André Marie Constant Duméril (1853)
  • Coelognathus radiata, Leopold Fitzinger (1843)
  • Coluber quadrifasciatus, Theodore Edward Cantor (1839)
  • Tropidonotus quinque, Theodore Edward Cantor (1839)
  • Coluber radiatus, Hermann Schlegel (1837)
  • Coluber radiatus, Friedrich Boie (1827)

Free photo downloads

Photos below for this species are published under Creative Commons license, means completely free for download. No need to ask for our permission to publish these on various media. Click the thumbnails for more details & download options.

  • Coelognathus radiatus
Coelognathus radiatus

Coelognathus radiatus

Creative Commons Attribution-ShareAlike 4.0 International Thai National Parks

Coelognathus radiatus

Coelognathus radiatus

Creative Commons Attribution-ShareAlike 4.0 International Thai National Parks

Coelognathus radiatus

Coelognathus radiatus

Creative Commons Attribution-ShareAlike 4.0 International Thai National Parks

Distribution map of Copperhead racer, Coelognathus radiatus in Thailand
  • Ao Luek District, Krabi
  • Ban Bueng District, Chonburi
  • Ban Lat District, Phetchaburi
  • Bang Lamung District, Chonburi
  • Bangkok Province
  • Cha-Am District, Phetchaburi
  • Chiang Dao District, Chiang Mai
  • Chok Chai District, Nakhon Ratchasima
  • Chom Bueng District, Ratchaburi
  • Dan Sai District, Loei
  • Det Udom District, Ubon Ratchathani
  • Doem Bang Nang Buat District, Suphan Buri
  • Doi Khun Tan National Park
  • Doi Phu Kha National Park
  • Doi Saket District, Chiang Mai
  • Doi Suthep-Pui National Park
  • Hang Chat District, Lampang
  • Hang Dong District, Chiang Mai
  • Hua Hin District, Prachuap Khiri Khan
  • Huai Kha Khaeng Wildlife Sanctuary
  • Huai Khot District, Uthai Thani
  • Kaeng Krachan District, Phetchaburi
  • Kaeng Krachan National Park
  • Khao Lak - Lam Ru National Park
  • Khao Sam Roi Yot National Park
  • Khao Sok National Park
  • Khao Yai National Park
  • Khao Yoi District, Phetchaburi
  • Khlong Luang District, Pathum Thani
  • Khlong Thom District, Krabi
  • Khun Yuam District, Mae Hong Son
  • Ko Chang District, Trat
  • Ko Lanta District, Krabi
  • Ko Samui District, Surat Thani
  • Lahan Sai District, Buriram
  • Mueang Chiang Mai District, Chiang Mai
  • Mueang Chiang Rai District, Chiang Rai
  • Mueang Chonburi District, Chonburi
  • Mueang Kalasin District, Kalasin
  • Mueang Kanchanaburi District, Kanchanaburi
  • Mueang Krabi District, Krabi
  • Mueang Loei District, Loei
  • Mueang Mukdahan District, Mukdahan
  • Mueang Nakhon Sawan District, Nakhon Sawan
  • Mueang Nong Khai District, Nong Khai
  • Mueang Nongbua Lamphu District, Nong Bua Lamphu
  • Mueang Phetchaburi District, Phetchaburi
  • Mueang Phichit District, Phichit
  • Mueang Ratchaburi District, Ratchaburi
  • Mueang Samut Sakhon District, Samut Sakhon
  • Mueang Udon Thani District, Udon Thani
  • Na Haeo District, Loei
  • Nam Nao National Park
  • Nikhom Phatthana District, Rayong
  • Noen Maprang District, Phitsanulok
  • Nong Phai District, Phetchabun
  • Pang Sida National Park
  • Phimai District, Nakhon Ratchasima
  • Phu Luang Wildlife Sanctuary
  • Phuket Province
  • Pua District, Nan
  • Sai Yok District, Kanchanaburi
  • Sam Roi Yot District, Prachuap Khiri Khan
  • San Sai District, Chiang Mai
  • Saraphi District, Chiang Mai
  • Sawang Daen Din District, Sakon Nakhon
  • Takua Pa District, Phang Nga
  • Tat Mok National Park
  • Tha Li District, Loei
  • Tha Takiap District, Chachoengsao
  • Tha Yang District, Phetchaburi
  • Thalang District, Phuket
  • Thoeng District, Chiang Rai
  • Umphang District, Tak
  • Wichian Buri District, Phetchabun

Range map of Coelognathus radiatus in Thailand

Important note; our range maps are based on limited data we have collected. The data is not necessarily accurate or complete.

Special thanks to Ton Smits, Parinya Pawangkhanant, Ian Dugdale and many others for their contribution for range data.

It is free to use this map on various media. See the creative common license terms by clicking "CC" icon below the map. But remember, again; the map may not be accurate or complete.

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Please help us improving our species range maps. To add a new location to the range map we need a clear image of the specimen you have encountered. No problem if you do not know the species, we will do our best to identify it for you.

For the location, please provide the district name or the national park/ wildlife sanctuary name.

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