Snakes northern Thailand—illustrated checklist

In this illustrated checklist “northern Thailand” is considered as consisting of 17 provinces:
Upper North: Mae Hong Son, Chiang Mai, Chiang Rai, Phayao, Nan, Lamphun, Lampang, Phrae, Uttaradit. Lower North: Tak, Sukhothai, Phitsanulok, Phetchabun, Kamphaeng Phet, Phichit, Nakhon Sawan and Uthai Thani.

Family: Typhlopidae (Blind Snakes), small and very small snakes resembling earthworms, shiny black or grayish-brown, NO enlarged ventral shields (all body scales have a similar size), head indistinct, reduced eyes. More about the blind snakes: click here .

1. Indotyphlops (Ramphotyphlops) albiceps, the White-headed Blind Snake (A)
2. Indotyphlops (Ramphotyphlops) braminus,the Flowerpot Snake (B: picture© Jonathan Hakin, with thanks!)
3. Argyrophis (Typhlops) diardii , Diard’s Blind Snake (C-D)
4. Typhlops porrectus, also recorded in northern Thailand, is not depicted here.

Family: Cylindrophiidae (Pipe Snakes), “Primitive snakes”, one species known from Thailand. NO enlarged ventral shields (all body scales similar size), head small and indistinct. More about these snakes: click here .

Cylindrophis jodiae, the Red-tailed Pipe Snake.

Family: Xenopeltidae (sun beam snakes). Primitive snakes with shovel-like flattened head and strongly iridescent dorsal scales. One species is known from Thailand.

Figure 3.
6. Xenopeltis unicolor, the Sunbeam Snake. Upper side shiny purplish-grey, belly white, head flattened (shovel-like). Reaching a length of 1 m. Common throughout the valleys and lowlands of northern Thailand, occasionally found at higher elevations. A. Specimen from San Patong District, Chiang Mai. B. Pua District, Nan. C. Captive specimen from Mae Rim District, Chiang Mai showing its white belly, while devouring a Striped Keelback (Amphiesma stolatum). D. Specimen showing the characteristic scalation of the upperside of the head.
More about this snake (in Dutch): click here :

Family: Pythonidae (Pythons), large powerful constrictors reaching maximum lengths of 3-10 m. Three species are known to occur in northern Thailand. More about them; click here .

7. Malayopython (Broghammerus/Python) reticulatus, the Reticulated Python.
8. Python molurus (bivattus), the Burmese or Indian Python.
9. Python brongersmai, the Short or Blood Python.

Family Xenodermatidae  (Strange-skinned Snakes). Snakes characterized by dorsal scales that are not overlapping but embedded in the interstitial skin, hardly touching each other. One species is known from northern Thailand. More about this snake .

10. Parafimbrios lao.

Family: Pareidae  (Snail Eaters or Slug Snakes). Four species are known to occur in northern Thailand. For the Illustrated Check List of the and  more pictures and more about the four species of snail eaters that occur in northern Thailand: click here  .

11. Pareas carinatus or Keeled Snail Eater
12. Pareas hamptoni or Hampton’s Snail Eater
13. Pareas margaritophorus, the Keeled Bicolored-spotted Snail Eater
14. Pareas macularius, the Smooth Bicolored-spotted Snail Eater

Homalopsidae, mud snakes. More pictures of these snakes in: click here .

15. Enhydris enhydris
16. Enhydris jagorii, Jagor’s Water Snake (no picture)
17. Enhydris subtaeniatus
18. Homalopsis mereljcoxi, the Puff-faced Water Snake
19. Hypsicopus (Enhydris) plumbea, the Yellow-bellied or Plumbeous Water Snake
20. Subsessor (Enhydris) bocourti (no picture)

Colubridae-1-A-C. For the Illustrated Check List of the Colubrid snakes in the genera Ahaetulla, Boiga, Calamaria, Chrysopelea and Coelognathus click here .

21. Ahaetulla nasuta, the Long-nosed Whip (Vine) Snake
22. Ahaetulla prasina, the Oriental Whip Snake.
23. Boiga cyanea, the Green Cat-eyed Snake
24. Boiga multomaculata, the Many-spotted Cat-eyed Snake.
25. Boiga siamensis, the Grey or Siamese Cat-eyed Snake.
26. Calamaria lumbricoidea
27. Calamaria pavimentata.
28. Chrysopelea ornata, the Golden Tree Snake.
29. Coelognathus flavolineatus
30. Coelognathus radiatus, the Copperhead Racer.
30-extra. Cyclophiops multicinctus. A recent addition to ophiofauna of Thailand.

Colubridae-2-D-G. For the Illustrated Check List of the Colubrid snakes in the genera Dendrelaphis, Dinodon, Dryocalamus, Dryophiops, Gongylosoma and Gonyosoma click here .

31. Dendrelaphis cyanochloris, the Blue Bronzeback.
32. Dendrelaphis ngansonensis
33. Dendrelaphis nigroserratus or Saw-tooth-necked Bronzeback.

34. Dendrelaphis pictus, the Common Bronzeback
35. Dendrelaphis subocularis
36. Dinodon septentrionalis, the Mountain Wolf Snake.
37. Dryocalamus davisonii, Blanford’s Bridle Snake.
38. Dryophiops rubescens, the Red Whip Snake.
39. Gongylosoma scriptus, the Indo-Chinese Ground Snake
40. Gonyosoma oxycephalum, the Red-tailed Rat Snake.
41. Gonyosoma prasinum, the Green Tree Racer.

Colubridae-3-H-L. For the Illustrated Check List of the Colubrid snakes in the genera Liopeltis and Lycodon click here .

42. Liopeltis frenatus. A recent addition to ophiofauna of Thailand.
43. Liopeltis stoliczkae, Stoliczka’s Stripe-necked SnakeA recent addition to ophiofauna of Thailand.
44. Lycodon capucinus, the House Wolf Snake.
45. Lycodon fasciatus
46. Lycodon laoensis. the Lao Wolf Snake.
47. Lycodon subcinctus, the Malayan Banded Wolf Snake

Colubridae-4-M-O. For the Illustrated Check List of the Colubrid snakes in the genera Oligodon, Oreocryptophis and Orthriophis click here .

48. Oligodon cinereus, form 1
49. Oligodon cinereus, form 2.
50. Oligodon cyclurus
51. Oligodon fasciolatus, the Banded Kukri Snake, non-striped form
52. Oligodon fasciolatus, the Banded Kukri Snake, striped form
53. Oligodon inornatus, the Inornate Kukri Snake (no picture)
54. Oligodon joynsoni .
55. Oligodon mouhoti .
56. Oligodon sp.
57. Oligodon taeniatus, the Striped Kukri Snake.
58a. Oreocryptophis porphyracea porphyracea, the Red Mountain Racer.
58b. Oreocryptophis porphyracea coxi.
59. Orthriophis taeniurus (helfenbergeri)

Colubridae-5-P-S. For the Illustrated Check List of the Colubrid snakes in the genera Plagiopholis, Psammophis, Ptyas and Sibynophis click here .

60. Plagiopholis nuchalis, the Arrow-head Snake.
61. Plagiopholis blakeswayi (no picture)
62. Psammophis indochinensis, the Indochinese Sand Snake.
63. Ptyas carinata
64. Ptyas korros, the Indo-Chinese Rat Snake
65. Ptyas mucosa, the Common Rat Snake
66. Ptyas nigromarginata, the Green Rat Snake.
67. Sibynophis collaris, the Common Blackhead.

Natricidae. More pictures and more information about the 15 species from the family of Keelback Water Snakes: click here .

68. Amphiesma stolatum, the Striped Keelback
More about this species (in Dutch), click here .
69. Hebius bitaeniatum, the Two-striped Keelback.
70. Hebius deschauenseei, the Northern Keelback
71. Hebius khasiense, the Khasi Hills Keelback
72. Opisthotropis spenceri, Spencer’s Stream Snake.
73. Paratapinophis praemaxillaris, Angel’s Stream Snake (no picture)
74. Psammodynastes pulverulentus, the Mock Viper.
75. Rhabdophis chrysargos, the Speckle-bellied Keelback.
76. Rhabdophis nigrocinctus, the Green Keelback.
77. Rhabdophis subminiatus, the Red-necked Keelback.
78. Sinonatrix percarinata, the Chinese Keelback (false?) (no picture)
79. Sinonatrix yunnanensis, the Yunnanese Keelback.
80. Xenochrophis flavipunctatus, the Yellow-spotted Keelback.
81. Xenochrophis piscator, the Checkered Keelback.
82. Xenochrophis punctulatus (no picture)

83. Pseudoxenodon macrops, the Big-eyed Mountain Keelback. The ground color of this snake that grows to a maximal length of 120 cm varies from olive-green to reddish-brown. The dorsals are keeled and it has big eyes with round pupils. Like a cobra it can raise its body and make a hood. The hood mark  is usually a dark chevron-like band (D). The anterior part of the belly has a characteristic pattern of black half moon-shaped blotches (B). Widespread and quite common in the mountains at elevations more than 1000 m asl. A-B. A 0live-green juvenile from Tak’s Phop Phra District. C. A reddish-brown adult from Pua District, Nan. D. A brown adult from Doi Suthep, Mueang, Chiang Mai, showing hood with dark brown chevron on light-brown ground color.

Elapidae, the family of dangerously venomous snakes containing the cobras, coral snakes, kraits and the King Cobra.

For more pictures of the 8 species of Elapid snakes that occur in northern Thailand, click here .

84. Bungarus candidus, the Blue Krait or Malayan Krait
85. Bungarus fasciatus, the Banded Krait
86. Bungarus cf multicinctus wanghaotingi, the Many-banded Krait
87. Calliophis maculiceps, the Many-spotted Coral Snake.
88. Naja kaouthia, the Monocellate Cobra
89. Naja siamensis, the Siamese Spitting Cobra
90. Ophiophagus hannah, the King Cobra.
91. Sinomicrurus macclellandi, the Mac Clelland’s Coral Snake


Family: Viperidae. About 10 species of pit-vipers and vipers have been recorded in northern Thailand. These snakes are usually brown with blotches or green, their head is triangular-shaped and its upper side covered with many tiny scales.  More about these snakes .

92. Calloselasma rhodostoma, the Malayan Pit-viper
93. Daboia siamensis, the Siamese Russell’s Viper
94. Ovophis monticola, the Mountain Pit-viper
95. Protobothrops mucrosquamatus, the Brown-blotched Pit-viper
96. Protobothrops spec. (“Protobothrops scholaris”)
97a. Trimeresurus albolaris
97b. Trimeresurus cf albolabris
98. Trimeresurus gumprechti
99. Trimeresurus macrops, the Big-eyed Pit-viper
100. Trimeresurus popeiorum, Pope’s Pit-viper