Common on acid heathland, moorland, grassland, woodland rides and roadside verges throughout the British Isles. In Hampshire and on the Isle of Wight very common on the heaths of the New Forest and the north-east. Wingspan 22-34 mm. Day-flying. Very variable, but only likely to be confused with
Latticed Heath Chiasmia clathrata, which see; in the south a large, yellow form sometimes occurs on chalk downland and in young plantations. Larva feeds on Red Clover, White Clover and Bird's-foot Trefoil, over-wintering as a pupa.