Common and widespread on heather moorland from June to August. Heather (Calluna vulgaris) and bell heather (Erica cinerea) are the two main food-plants.

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.