Boiga kraepelini, commonly known as the square-headed cat snake, Kelung cat snake,[1] or Taiwanese tree snake[3] is a species of mildly venomous, rear-fanged snake in the family Colubridae. The species is endemic to East Asia and Southeast Asia (Taiwan, China, Vietnam, and Laos).[1][2][4] Its specific name, kraepelini, honours Karl Kraepelin, a German naturalist.[4][5] The common name, Kelung cat snake, refers to its type locality, Keelung in northern Taiwan.[2]
B. kraepelini is a long and thin snake that can grow to a total length (including tail) of 160 cm (63 in). Its head and eyes are large (the head is twice the width of the neck), hence the Chinese name meaning "big-headed snake" (simplified Chinese: 大头蛇; traditional Chinese: 大頭蛇; pinyin: dàtóushé). The pupils are cat-like, as is typical for the genus. The colouration of the upper surface of the body and tail is usually amber or brown to copper brown, with irregular brown to diffuse black cross bands along the vertebral line.[4]
B. kraepelini is oviparous.[1][2][4] Females lay 5–14 eggs per clutch in summer.[4]
B. kraepelini can be quite aggressive, forming a defensive coil and striking in a viper-like fashion when threatened. The properties of the venom are poorly known, but it is considered only mildly venomous.[4]
B. kraepelini is found throughout Taiwan to 1,000 m (3,300 ft) asl,[4] large parts of eastern, central, and southern China (Anhui, Chongqing, Fujian, Gansu, Guangdong, Guangxi, Guizhou, Hainan, Hunan, Jiangxi, Sichuan, and Zhejiang provinces), Laos, and northern Vietnam.[1][2]
B. kraepelini inhabits both primary and secondary forest habitats, often near villages.[1] It is a nocturnal snake that is largely arboreal, although it may descend to the ground to cross roads. It preys upon small birds and lizards, and sometimes bird eggs.[4]
B. kraepelini is a widespread and common species. It can be locally threatened by habitat loss. It occurs in many protected areas.[1]
Boiga kraepelini, commonly known as the square-headed cat snake, Kelung cat snake, or Taiwanese tree snake is a species of mildly venomous, rear-fanged snake in the family Colubridae. The species is endemic to East Asia and Southeast Asia (Taiwan, China, Vietnam, and Laos). Its specific name, kraepelini, honours Karl Kraepelin, a German naturalist. The common name, Kelung cat snake, refers to its type locality, Keelung in northern Taiwan.
