Brown-spotted Pit Viper

The brown-spotted pit viper (Protobothrops mucrosquamatus), also called the Taiwan habu or pointed-scaled pit viper, is a pit viper found from north-eastern India and Bangladesh to Myanmar, Laos, Vietnam, northern Thailand, Taiwan and China, where it ranges as far north as Gansu and as far east as Zhejiang, including Hainan. (The Reptile Database; Wikipedia, general species account)

Males reach a maximum total length of about 112 cm and females about 116 cm. It is grey or olive-brown above with large black-edged brown spots down the back and smaller spots along the sides, and the belly is whitish, heavily powdered with light brown. (Wikipedia, general species account)