Dark Sword-grass

Agrotis ipsilon

Regular migrant to Britain, mainly nocturnal.

The Larvae feeds on herbaceous plant above or below the ground.

Forewings brown, reddish-tinged, mixed with pale greyish-ochreous, costa and sometimes median area suffused with dark fuscous; first and second lines edged with dark fuscous; spots outlined with black, reniform followed by a short black dash; subterminal line obscure, usually preceded in middle by two fine black marks.

Adults can turn up almost anywhere between March-November, however it's most numerous between August-October.

This species is also known to migrate north in the spring and migrate south in the fall.