Appearance
The wingspan is 36–47 mm. The forewings are highly variable in colour but usually greyish brown with a pattern of black streaks and spots. The hindwings are dirty white in males and dark grey in females. Adults are on wing from April to September in the south and from June to August in the north. There is one generation per year in the north.
Food
The larvae feed on the leaves of various woody plants, including ''Fagus'', ''Betula'', ''Ulmus'', ''Acer'', ''Ipomoea'', ''Quercus'', ''Hamamelis'', and ''Rosa'' species. Larvae can be found from May to October. The species overwinters in the pupal stage.References:
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