The Dun-bar (Cosmia trapezina) is a moth of the family Noctuidae. It is a common Palearctic species.The species occurs throughout almost the whole of Europe. In the North, the range extends to Middle Fennoscandia, in the East to the Urals. The species occurs in North Africa, Asia minor, Syria, Iraq, Iran, Caucasus, Central Asia to China, Korea and Japan (subspecies C. t. exigua (Butler, 1881)). It rises in the Alps up to 1600 m. See glossary for terms used 1. \n* The flight season refers to the British Isles. This may vary in other parts of the range.