
Photo: (c) Ashwin Viswanathan, some rights reserved (CC BY) · CC-BY (May be cropped or resized)
Herpetoreas xenura
Range
North-east India (Khasi Hills, Meghalaya) and Bangladesh; also Myanmar
Wall's keelback is a keelback snake endemic to north-east India and Bangladesh. It is found in the Khasi Hills in Meghalaya, and also in Bangladesh and Myanmar (Wikipedia, general species account).
The Reptile Database lists Tripura, Meghalaya and Mizoram. The account used here gives no further detail.