Nationally scarce (Nb) in long-established birch woodland and heathland, in northern England and Scotland, also appearing as a migrant on the southern coast of England. In Hampshire migrants have been recorded at six localities, most recently at Southsea in August 1997. Not recorded from the Isle of Wight to date. Wingspan 40-50 mm. The most likely confusion species is Orange Sallow Xanthia citrago
(MBGBI Vol 10), which is much smaller, has the antemedian fascia faint, without sharp angulation, and the median fascia dark, broad and conspicuous. Larva feeds on Silver Birch, Downy Birch and Aspen, over-wintering as an egg.