
Photo: TimVickers · Public domain
Protobothrops cornutus
Habitat
Evergreen forest on karst and granitic outcrops, 250–2,000 m
Range
Northern and central Vietnam and southern China (Guangdong, Fujian)
Size
Usually 60–90 cm
The horned pit viper (Protobothrops cornutus), or Fan-Si-Pan horned pit viper, is found in northern and central Vietnam and southern China, in Guangdong and Fujian. It occurs in evergreen forest on both karst and granitic outcrops at 250–2,000 m. (The Reptile Database; Wikipedia, general species account)
Maximum length is usually around 60–90 cm. It has a long body and a flat, oblong-triangular head distinct from the neck, and it has been recorded with the largest attack acceleration of any snake, about 18 g. (Wikipedia, general species account)