Photo © Nigel Voaden
Lycia lapponaria, the Rannoch brindled beauty, is a moth of the family Geometridae. It is found in most of the northern part of the Palearctic realm, including Scotland.
The wingspan is 26-34 mm for males. Females are wingless. Adult males are on wing from March to April in the south and from May to mid June in the north. There is one generation per year.
The larvae feed on Betula nana, Myrica gale and Calluna vulgaris. Larvae can be found in July. It overwinters as a pupa.
Source: Wikipedia
The primary larval foodplants are Bell Heather (Erica cinerea), Bilberry (Vaccinium myrtillus), Bog-myrtle (Myrica gale), Cross-leaved Heath (Erica tetralix), Eared Willow (Salix aurita) and Heather (Calluna vulgaris).