Achalinus ater

Achalinus ater, commonly known as Bourret's odd-scaled snake, is a species of snake in the family Xenodermatidae.

Distribution
The species is found in northern Vietnam and China in Guizhou and Guangxi. An individual found in Hecheng District, Huaihua during early May 2013 was originally reported as the first known occurrence of the species in Hunan Province. However, molecular analysis has found this specimen to be a separate species named Achalinus hunanensis in 2023, and A. ater is no longer believed to range into Hunan.