
Photo: (c) Ian Dugdale, some rights reserved (CC BY) · CC-BY (May be cropped or resized)
Trimerodytes yunnanensis
Range
Thailand, Yunnan (China) and Myanmar; the Reptile Database also lists Vietnam and Arunachal Pradesh
The Yunnan water snake, or Yunnan annulate keelback, is a colubrid found in Thailand, Yunnan province in China, and Burma (Wikipedia, general species account).
The Reptile Database also lists Arunachal Pradesh in India, so its Indian occurrence rests on that source. The account used here gives no further detail.