This pitviper is found in mountainous regions in southern Hunan. Although first discovered in the Mt. Mang mountain range, it is also found in surrounding areas, primarily in forested areas with thick vegetation and cover. Frequently it rests against logs and other structures along animal trails to ambush prey, and can also be found in the numerous caves in the region. Winter temperatures in the region come close to freezing, whilst summer temperatures can reach 30 °C (86 °F) or higher.