Common and widespread on the Scottish mainland but scarce in the Outer Hebrides. Active from May to early August in woodland and over moorland. Aspen (Populus tremula) and other poplars, and willows (Salix spp.) are used by the larvae.

References: 
Leverton, R. & Cubitt, M. (2024). The Larger Moths of Scotland.
Waring, P. & Townsend, M. (2018 third edition). Field Guide to the Moths of Great Britain and Ireland.