A moth that has spread quite rapidly north in recent years and is now frequently recorded here in the southern islands. Currently, there are only historical records from Harris and Lewis. The larval food-plant is rosebay willowherb (Chamerion angustifolium).

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.