Rhacophorus bipunctatus

Rhacophorus bipunctatus is a tree frog found from eastern India into Southeast Asia, possibly to south-eastern China and south to Malaysia. It is a smallish tree frog with a pointed snout and an adult body length of about 37-60 mm, females being larger than males. The back is intensely green to violet-brown in living animals, and blue to violet in preserved specimens (Wikipedia, general species account).

Its taxonomy is tangled: the scientific name has changed twice, it was described under different names twice more than 130 years apart, and a second species has been confused with it. In sources published from 1999 onwards, the name R. bipunctatus can also refer to R. rhodopus (Wikipedia, general species account).