Local in oak woodland throughout much of England, Wales and Ireland. In Hampshire and on the Isle of Wight there has been a marked increase in numbers: before 1997 barely annual in appearance, after 1997 recorded in double figures in most years, with in excess of 40 in 2006. Wingspan 18-20 mm. Easily recognised by the broad, reddish fuscous median area of forewing [Goater]. Larva feeds on Oak, Alder, Birch and Bog-myrtle, living within a spun or rolled leaf, over-wintering as a pupa.