Psammodynastes pulverulentus

Psammodynastes pulverulentus, the common mock viper, is a species of snake native to Asia.
It is a small snake, and it will form defensive coils and strike in a viper-like fashion when threatened, although it is harmless to humans.

Distribution

The common mock viper is known from Bangladesh, Myanmar, Cambodia, China, north-eastern India, Bhutan, Indonesia, Laos, Malaysia, Nepal, the Philippines, Taiwan, Thailand, and Vietnam. It has been reported from Singapore.
Subspecies Psammodynastes pulverulentus papenfussi is endemic to Taiwan.