The willow beauty (Peribatodes rhomboidaria) is a moth of the family Geometridae. It is a common species of Europe and adjacent regions (Near East and the Maghreb). While it is found widely throughout Scandinavian countries, which have a maritime climate, it is absent from parts of the former USSR which are at the same latitude but have a more continental climate. Up to four subspecies are listed by some authors, while others consider the willow beauty a monotypic species or accept only rhomboidaria and sublutearia as distinct: