
Photo: Santulan Mahanta · CC BY-SA 4.0 (May be cropped or resized)
Dendrelaphis proarchos
Range
North-east India, Bhutan, Bangladesh, Myanmar, Laos, Vietnam and China
Size
At least 121cm; tail 30–36% of total length
Dendrelaphis proarchos is a colubrid snake found in north-east India, Bhutan, Bangladesh, Myanmar, Laos, Vietnam and China. It can reach at least 121 cm in total length, and the tail is long, making up about a third of the total (30–36%) (Wikipedia, general species account).
The Reptile Database lists Tripura, Sikkim, Nagaland, Meghalaya, Arunachal Pradesh and Mizoram, and also Gujarat and Maharashtra with a query. The account used here gives no further detail.