Wingspan 42 - 50mm. This moth is mostly dark grey with rust-like blotches and lines.
Woodlands and waste ground. The caterpillars feed on the leaves of alder, birch, hazel and oak.
Status and distribution
Common and widespread in England and Wales, less common and widespread in Scotland. Common in Nottinghamshire and at Netherfield Lagoons.
Best time to see
April to September in two broods.