Siamese Viper

The Eastern Russell's Viper is a robust viper with a greyish or olive dorsal ground colour and three rows of large dark spots, with smaller spots between them. The rear portion of the underside is suffused with grey. Its range includes Guangxi and Guangdong in southern China, Taiwan, Myanmar, Thailand, Cambodia, parts of India, Nepal and several Indonesian islands. It was formerly treated as a subspecies of Daboia russelii but was elevated to species rank in 2007. (Wikipedia, general species account)