Boiga kraepelini, commonly known as the square-headed cat snake, Kelung cat snake, or ******ese tree snake is a species is a species of mildly venomous colubrid snake found in East and Southeast Asia (******, 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 ******.