The body length of the pit viper is 60-70 cm, the head is slightly triangular, the neck is thin, with cheek sockets, the head and neck are clearly distinguished, the back is light brown to reddish brown, and there is a dark color on the back of the head∧-shaped spots, two rows of dark brown round spots on the ridge, staggered and slightly juxtaposed to each other, a row of black-brown irregular thick spots on the outside of the dorsal scales and between the ventral scales, slightly star-shaped; the ventral surface is gray and white, densely covered Tan or dark brown fine spots.

pit viper SnakeThe body color changes greatly, the back of the head and body is from gray-brown to earthy red, the head has a black band from the back of the eyes to the corner of the mouth, and there is a yellow on the upper edge. White fine lines; black and brown round spots alternately arranged on the back of the body; gray-white to gray-dark brown on the ventral surface, with irregular black spots; black tail tip.