Thai National Parks

Species of Thailand

Collared reed snake

Calamaria pavimentata, André Marie Constant Duméril, Gabriel Bibron & Auguste Duméril, 1854

(In Thai: งูพงอ้อท้องเหลือง (ngu plong ao tong leuang))

The collared reed snake (Calamaria pavimentata) is a species of colubrid snake found in Asia. In Japan, it is also called Miyara's collared snake.


The rostral is as deep as it is broad, and it is well visible from above. The frontal is longer than broad, shorter than the parietals, and 2.0 to 2.5 times as broad as the supraocular. C. pavimentata has one preocular scale and one postocular scale with four upper labials (the second and fourth are the largest, with the second and third entering the eye). The first pair of lower labials form a suture behind the mental scale. There are two pairs of chin shields, each pair in contact with the other. The scales are in 13 rows. There are 140–182 ventral scales, the anal scale is entire, and it has 13–27 subcaudal scales, and a pointed tail.

The collared reed snake is reddish-brown above, with five dark longitudinal lines or series of spots. The nape is dark brown and separated from the back by a yellow collar. A pair of yellow spots is seen at the base and another at the end of the tail. The lower parts show a uniform yellow with a dark line along the tail in the Burmese and Javan specimens, obscured with brown mottlings or brown with lighter borders in C. p. siamensis.

The total length of the body is 12.5 cm with a 0.6-in (1.5-cm) tail.


This snake can be found in India (Assam), Myanmar, Thailand, Laos, Cambodia, Vietnam, west Malaysia (including Pulau Tioman), Indonesia, south and southwest China (including Hainan), Taiwan, and Japan (Ryukyu Islands).

Type locality: Java, Indonesia

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Scientific classification

Calamaria pavimentata

Common names

  • German: Braune Riednatter
  • English: Collared reed snake
  • Thai: งูพงอ้อท้องเหลือง (ngu plong ao tong leuang)


  • Calamaria pavimentata miarai, Takara, 1962

    Range: Japan (Yonagunijima)

  • Calamaria pavimentata pavimentata, André Marie Constant Duméril, Gabriel Bibron & Auguste Duméril, 1854

    Range: India, West Malaysia, Thailand, Laos, Vietnam, Cambodia, Myanmar, China, Taiwan, Japan


  • Calamaria pavimentata, Van Stanley Bartholomew Wallach et al. (2014)
  • Calamaria pavimentata miyarai, Richard C Goris & Norio Maeda (2004)
  • Calamaria pavimentata, Robert Frederick Inger & Harold Knight Voris (2001)
  • Calamaria pavimentata miyarai, Hidetoshi Ota (2000)
  • Calamaria pavimentata, Indraneil Das (1996)
  • Calamaria pavimentata miarai, Takara (1962)
  • Calamaria uniformis, Malcolm Arthur Smith (1943)
  • Calamaria pavimentata annamensis, René Léon Bourret (1937)
  • Calamaria pavimentata pavimentata, Clifford H. Pope (1935)
  • Calamaria pavimentata banaensis, René Léon Bourret (1934)

Conservation status

Least Concern (IUCN3.1)

Least Concern (IUCN3.1)


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Calamaria pavimentata - Khao Sok National Park
Calamaria pavimentata - Kui Buri National Park
Calamaria pavimentata - Kui Buri National Park
Calamaria pavimentata (juveline) - Khlong Yan Wildlife Sanctuary

Range Map

Distribution map of Collared reed snake, Calamaria pavimentata in Thailand
  • Chiang Dao District, Chiang Mai
  • Dan Sai District, Loei
  • Doi Inthanon National Park
  • Doi Pha Hom Pok National Park
  • Doi Suthep - Pui National Park
  • Hala-Bala Wildlife Sanctuary
  • Hat Yai District, Songkhla
  • Huai Kha Khaeng Wildlife Sanctuary
  • Khao Nan National Park
  • Khao Soi Dao Wildlife Sanctuary
  • Khao Sok National Park
  • Khao Yai National Park
  • Khlong Bang Yai Forest Park
  • Khlong Yan Wildlife Sanctuary (s/e)
  • Kui Buri National Park
  • Mae On District, Chiang Mai
  • Mae Rim District, Chiang Mai
  • Mae Taeng District, Chiang Mai
  • Nong Phok District, Roi Et
  • Pai District, Mae Hong Son
  • Pak Chong District, Nakhon Ratchasima
  • Pang Mapha District, Mae Hong Son
  • Phop Phra District, Tak
  • Sam Ngao District, Tak
  • Samoeng District, Chiang Mai
  • Si Satchanalai District, Sukhothai
  • Tha Wang Pha District, Nan
  • Umphang District, Tak
  • Wang Nam Khiao District, Nakhon Ratchasima
  • Wiang Pa Pao District, Chiang Rai
Range map of Calamaria pavimentata in Thailand