Common on grassland, sand-dunes, heathland, gardens and woodland rides throughout much of England and Wales, rare in Scotland, a species of conservation concern under the UK Biodiversity Action Plan. In Hampshire and on the Isle of Wight widespread and usually common, especially in the larval stage, on dunes, downs, open woodland and other places where the foodplant grows. Wingspan 35-45 mm. Unmistakable. Larva feeds on Common Ragwort, occasionally also on Oxford Ragwort, over-wintering as a pupa.