A local species found on rough ground in southern England. Since its arrival on the Isle of Wight in 1994, numbers have increased throughout the early 21st century and it is now established as a breeding species across southern England. In Hampshire and on the Isle of Wight after the first British record at Chale Green on the Island on 23 July 1994, it is now regular in the southern half of Hampshire and the Isle of Wight, and is probably resident north to central Hampshire, particularly along the Test and Itchen valleys, and can be expected to turn up anywhere. Wingspan 20-23 mm. Distinctive and easy to recognise. Larva feeds on Garlic Mustard and Hedge Mustard.