Trimeresurus insularis, commonly known as Indonesian pit viper, Lesser Sunda Islands pit viper, ""Komodo Island pit viper"", Sunda white-lipped pit viper or red-tailed pit viper, also popularly known as blue pit viper or blue viper, is a species of venomous pit viper found in eastern Java and the Lesser Sunda Islands.
The scalation includes 21 rows of dorsal scales at midbody, 156âÂÂ164/156âÂÂ167 ventral scales in males/females, 70âÂÂ75/54âÂÂ59 subcaudal scales in males/females, and 7âÂÂ12 supralabial scales. Their color patterns are often found to be green or blue-green, with specific populations even containing yellow variants as well.
It is found in Indonesia on eastern Java, Adonara, Alor, Bali, Flores, Komodo, Lombok, Padar, Rinca, Romang, Rote, Sumba, Sumbawa, Timor, Wetar, and Timor-Leste. The type locality given is "Soe, Timor". They are arboreal and can be found in dry monsoon forests at elevations up to above sea level.