Common in grassland, gardens and woodland rides throughout the British Isles. In Hampshire and on the Isle of Wight abundant in areas of grassland and open woodland, and amongst the rank grasses of the chalk downs. Wingspan 32-40 mm. The pale reniform stigma of Square-spot Rustic should preclude confusion with any other species; the much less common
Garden Dart Euxoa nigricans has the forewing narrower and a conspicuous claviform stigma (MBGBI Vol 9). Larva feeds on various grasses.