The Exile/Northern Arches Apamea exulis
Wingspan 43-50 mm.
This species has two subspecies occurring in Britain.
The form known as the Exile, ssp. marmorata is found here only in the Shetland Islands. The Northern Arches form (ssp. assimilis) occurs more regularly throughout Scotland, and is rather smaller than marmorata.
Inhabiting moorland, the moth flies in July and August.
The larva has not yet been found in the wild in Britain, but it is thought that moorland grasses are the foodplants.