A frequent moorland species often seen flying fast during the day from April to May. The larvae use many woody plants including heather (Calluna vulgaris), which is the main food-plant.

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.