Trimeresurus erythrurus

The red-tailed bamboo pit viper, Trimeresurus erythrurus, is a venomous pit viper described by Cantor in 1839. It has a green head and body with a brown-spotted tail, and males have a light stripe along each side that may be present or absent in females. Males reach about 575mm and females about 1,045mm (Wikipedia, general species account).

It is recorded from eastern India, Bangladesh, Myanmar, Bhutan and Nepal, and no subspecies are recognised. A photograph in the source shows one eating a gecko. The source gives no habitat, behaviour or venom detail (Wikipedia, general species account).