Vertebrate fauna of SE Asia
  

 

   
Home  
覧覧覧覧覧  
SE Asia fauna ...  
   
Primates
 Carnivorans
 Large Mammals
 Small Mammals
 Mammal calls
 Bats
覧覧
Birds
覧覧
 Snakes
 Lizards & Crocodilians
 Turtles
覧覧
 Amphibians
 Tadpoles
 Frog calls
覧覧
Freshwater Fishes
 Marine & Brackish Fishes
覧覧
Species Lists
 





 


 
覧覧覧覧覧  
New Guinea herptiles ...  
Snakes   Lizards   Frogs  
覧覧覧覧覧  
SE Asia Vert Records (SEAVR) archives ...  
  Indochina Records
  Indonesia & PNG Records
 
覧覧覧覧覧  
Philippines Vertebrate Records (PVR)  
Philippines Records  
Email :
 
覧覧覧覧覧  
   
  New or updated pages ...
 
 
     
 
     
 
     
 
覧覧覧覧覧  
 

Search this site ...

 
 


   

 
  覧覧覧覧覧  
 


Email :


Text and photos by Nick Baker, unless credited to others.
Copyright ゥ Ecology Asia 2024

 
     
 

 

 

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 

   
   
 
Long-tailed Mud Snake
   
   

Family : HOMALOPSIDAE
Species : Enhydris longicauda
Maximum Size : 
Females to 80 cm, males to 67 cm (Murphy, 2007)

Enhydris longicauda (Long-tailed Mud Snake) is one of Cambodia's endemic snakes; it is only known to occur in the vast seasonal lake of Tonl Sap and its immediate surrounds, which comprise part of the Mekong River system.

It is almost entirely aquatic in habits, and it must contend with the seasonal expansion of the lake, whose margins expand many kilometres into neighbouring land during the latter part of the rainy season, particularly in September and October.

The diet of Enhydris longicauda is known to include the Three-spot Gouramy (Trichopodus trichopterus) (Voris & Murphy, 2002).

This species is exploited as a food source; it is trapped in huge numbers, along with other mud/water snakes, to feed local people and, reportedly, farmed crocodiles. A study in November 2019 concluded that of eight snakes occurring in Tonl Sap this was the species most unintentionally trapped by local fishermen. Other bycatch included the Rainbow Water Snake (Enhydris enhydris)  (English, 2022).

The specific name 'longicauda' refers to its relatively long tail, when compared to the shorter tails of other homalopsines. Tail length is around 23-35% of snout-to-vent length. (Murphy, 2007) 

Its dorsal surface is mottled blackish-brown and medium brown. Its ventral surface is black, sometimes with yellow blotches; the black colour extends onto the flanks in a regular series of dark patches.

Its head is somewhat depressed, and its small eyes are located towards the top of the skull. Its snout is rounded.


Figs 1 and 2 : Typical examples harvested from Tonl Sap in January 2024.  Photos thanks to Derek Clark.

Figs 3 and 4 : Two views of the margin and flooded hinterland of Tonl Sap taken in September 2015, in the latter part of the rainy season.



References : H12


English, M., Winters, K., Lasater, M., Dainty, M., Meyerhoff, M., & Wagner, P. (2022). A dry season glimpse of watersnake. Cambodian Journal of Natural History, 38.

Murphy, J. C. (2007). Homalopsid Snakes. Evolution in the Mud (Kreiger, Melbourne, FL). 250 pp.

Voris, H. K., & Murphy, J. C. (2002). The prey and predators of homalopsine snakes. Journal of Natural History, 36(13), 1621-1632.


Links :

Wikipedia - Tonl Sap

 

 

 

Fig 1
 
ゥ  Derek Clark
Fig 2
   
ゥ  Derek Clark
Fig 3
 
Fig 4