White-lipped island pitviper

Description

Trimeresurus insularis is a venomous pit viper species found in eastern Java and the Lesser Sunda Islands (Indonesia and East Timor). Common names include white-lipped island pitviper and Sunda Island pitviper. The scalation includes 21 rows of dorsal scales at midbody, 156–164/156–167 ventral scales in males/females, 70–75/54–59 subcaudal scales in males/females, and 7–12 supralabial scales. Their color patterns are often found to be green or a blue-green color with specific populations even containing yellow variants as well. It is found in East Timor and in Indonesia on eastern Java, Adonara, Alor, Bali, Flores, Komodo, Lombok, Padar, Rinca, Romang, Roti, Sumba, Sumbawa, Timor, and Wetar. The type locality given is "Soe, Timor". They are arboreal and can be found in dry monsoon forests at elevations up to 1,200 m (3,900 ft) above sea level.