Focussing on the vertebrate
 fauna of SE Asia
  

 

Home  
覧覧覧覧覧  
SE Asia fauna ...  
   
Primates
 Carnivorans
 Large Mammals
 Small Mammals
 Bats
覧覧
Birds
覧覧
 Snakes
 Lizards & Crocodilians
 Turtles
覧覧
 Amphibians
 Tadpoles
FFrogs & other calls
覧覧
Fishes
覧覧
Species Lists
 








 
覧覧覧覧覧  
  SE Asia Vertebrate Records  (SEAVR) 2018  
覧覧覧覧覧  
New Guinea fauna ...  
   
Snakes
 Lizards
 Frogs
 
覧覧覧覧覧  
 Articles & Publications
 News Links
 
覧覧覧覧覧  
 

Search this site ...

 
 


   

 
  覧覧覧覧覧  

Recently added ...
 
 
     
 
     
 
 
覧覧覧覧覧  
     
   
     
    Links :  
  HOSCAP Borneo  
  Context Institute
  Herpetological Soc. Singapore
  HabitatID  
  Primatewatching  
  Orang Utan Appeal (UK)  
  Wallace Online  
    Citizen Action for Tigers  
    Nature Society (Singapore)  
  Traffic  
     
  Email :
 
     
  Text and photos by Nick Baker, unless otherwise credited.
Copyright ゥ Ecology Asia 2018
   

 

   
   
 
Hagen's Pit Viper
   
   

Family : VIPERIDAE
Species : Parias (Trimeresurus) hageni
Maximum Size : 116 cm

Hagen's Pit Viper inhabits primary lowland and hill forest up to elevations of 600 metres in parts of southern Thailand, Peninsular Malaysia, the Indonesian island of Sumatra, and other nearby islands such as Pulau Bangka.

It is nocturnal in habits and is typically encountered on low vegetation where it hunts for small mammals and birds.

Its body is robust, and its head is of typical pit viper shape, being markedly wider that its body. Its body colour is green, rarely with vague slightly darker banding. Many specimens bear a series of small, pale spots either side of the vertebral line (with each spot not greater than two body scales). 

The underside is pale green and a continuous white line, which commences behind the eye and extends down to the tail, separates ventral scales from the dorsal scales. The chin and throat, and scales above and below the lips are pale green to whitish.

In Singapore the species is listed as 'indeterminate' i.e. there are no unequivocal records from the country.


Figs 1 and 2 : Example from Panti Forest, Johor, Peninsular Malaysia.  This specimen has plain green body scales and lacks pale spots. The labial scales are markedly white.  Photos thanks to Serin Subaraj.


References : H12



 

Fig 1
  
ゥ  Serin Subaraj
Fig 2
  
ゥ  Serin Subaraj