Apamea zeta is a species of moth in the Noctuidae family.

This species has two subspecies in Britain, Apamea zeta assimilis, which is known as the Northern Arches, and is classed as Nationally Scarce A in Britain, while Apamea seta marmorata, known as the Exile, is found only in Shetland. This species is dark, with a well defined crest on the thorax. The Northern Arches is dark reddish brown, while the Exile is less red. The Exile has more distinct markings.
Norhtern Arches TL

When the Northern Arches/ Exile is active

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