[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).

[4] B. kraepelini can be quite aggressive, forming a defensive coil and striking in a viper-like fashion when threatened.

[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] B. kraepelini is a nocturnal snake that is largely arboreal, although it may descend to the ground to cross roads.