Grey Mountain Carpet Entephria caesiata
([Denis & Schiffermüller], 1775)
Wingspan 32-41 mm.
A mountain and moorland species, which occurs in suitable habitat from the Midlands northwards to northern Scotland and Ireland. It is well-known for its habit of resting on stone walls and rocks.
The rather variable adults fly from July to August.
The larvae feed on a number of low heathland plants such as heather (Calluna) and bilberry (Vaccinium myrtillus).