The Engrailed and Small Engrailed (Ectropis crepuscularia) are moths of the family Geometridae. It is found from the British Isles through Central and Eastern Europe to the Russian Far East and Kazakhstan. The Western Mediterranean and Asia minor and the Caucasus represents the southern limit of the distribution (with the Balkan countries). In the North the distribution area ends at the Arctic circle. It also occurs in North America. There is a debate as to whether they make up one species, or whether E. crepuscularia actually refers only to the Small Engrailed, with the Engrailed proper being separable as E. bistortata.