Protobothrops kaulbacki
Habitat
On the ground and partly in trees
Range
Northern Myanmar, possibly Yunnan, and Arunachal Pradesh and Nagaland, India
Size
Males up to 134cm; females up to 141cm
Kaulback's lance-headed pit viper is a pit viper endemic to Asia that also occurs in Arunachal Pradesh. Adult males may reach a total length of 134 cm and females 141 cm. It is green above with a series of dark angular spots down the back, which may join into a zigzag stripe. The top of the head is black with yellow stripes, and the belly is grey with large squarish or crescent-shaped yellow spots (Wikipedia, general species account).
It lives mainly on the ground and partly in trees. Eggs measure about 48–53 mm by 26–27 mm. The Reptile Database lists Papum Pare District in Arunachal Pradesh, and Nagaland.