An uncommon species In Scotland, it is found in the west and central areas; the very similar May highflyer (Hydriomena impluviata) predominates in the east. It prefers open wooded areas and can be found from May to June. Eared willow (Salix aurita) is the preferred food-plant but other willow species are used.

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.