Common in upper moorland areas, flying from June to August. The larval food-plants are bedstraws (Galium spp.). It overwinters as a small larva.

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.