The bordered white (Bupalus piniaria), also known as the pine looper, is a moth of the geometer moth family (Geometridae). Among these, it belongs to tribe Bupalini of the subfamily Ennominae. B. piniaria is a common species throughout the western Palearctic region, the Near East and North Africa. However, its presence in certain regions – e.g. the northern Balkans – is doubtful. Three subspecies are generally recognized, while two additional ones are doubtfully distinct: In addition, some forms (e.g. kolleri) have also been named.