Common on downland, sand-dunes, sea cliffs, heaths, waste ground, quarries and rough grassland; 0-700 m (0-2900 m in Europe) throughout much of the British Isles; mainland Europe and Fennoscandia. In Hampshire and on the Isle of Wight widespread and common. Wingspan 28-36 mm. Larva feeds on Bird's-foot Trefoil, Greater Bird's-foot Trefoil, Common Restharrow and Black Medick, subsequently living underground where attended by ants.