Local in flower meadows, calcareous grassland, roadside verges and sea cliffs throughout England and Wales. In Hampshire and on the Isle of Wight scattered colonies of this species occur on meadows and downs, but rare in the New Forest. Wingspan 18-20 mm. Flies during the day in sunshine. Hindwing primrose-yellow with broad black border to one-third and heavy black suffusion at base (MBGBI Vol 10), together with day-flying habit and small size preclude confusion with any other British moth, although it has been compared to the pyralid
Pyrausta aurata. Larva feeds on seed capsules of Common Mouse-ear and Field Mouse-ear, over-wintering as a pupa.