Rare immigrant from mainland Europe, appearing in south-eastern England for the first time at Bradwell-on-Sea, Essex, on 3 October 1951. From about 1920 had spread rapidly into Western Europe from the central Palaearctic, and has been seen increasingly in Britain, especially in the last ten years. In Hampshire and on the Isle of Wight recorded for the first time in August 1991, and then again in 1998, 1999 and 2001 (the first for Wight); 2003 to 2006 saw a further six, with another six in 2007, 11 in 2008 and another six in 2009. This pattern has been maintained up to the present year and increasingly extending its range into the north of the county, which may be originating from the London population spreading west. Wingspan 32-38 mm. Fairly distinctive. Larva feeds on herbaceous plants such as Stinging Nettle, Yarrow, Corn Chamomile, Stinking Chamomile and Wormwood; breeding has been confirmed in Middlesex and is probably established elsewhere.