
Photo: Rushen · CC BY-SA 2.0 (May be cropped or resized)
Trimeresurus hageni
Range
Southeast Asia
Hagen's pit viper, also called Hagen's green pit viper, is a species of venomous snake in the subfamily Crotalinae of the family Viperidae, native to Southeast Asia. No subspecies are recognised as valid (Wikipedia, general species account).