2284 Grey Dagger Acronicta psi ABH 73.038

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Family Geometridae » Geometrinae

Wingspan 30-40 mm.

Flight Period Throughout Britain, and flying in July and August, it is nocturnal and comes to light. One generation. June-Aug.

Description The 'daggers' get their English names from the black dagger-like markings on the forewings. This moth is almost impossible to tell by the markings alone from the Dark Dagger (A. tridens), and reference usually has to be made to the genitalia for confirmation. Caution should be taken if only a field record as Acronita psi / tridens

They can however be distinguised as caterpillars so rearing is another way to be absolute

Acronita psi / tridens


Habitat It inhabits woods, heaths and moors, .