description Grey dagger Overview
The grey dagger is a noctuid moth with the scientific name Acronicta psi. Adults are generally grey and have a dark, dagger-like marking on the forewings, although identification can be difficult because the species closely resembles the dark dagger, Acronicta tridens. It occurs in parts of Europe and is associated with habitats where its caterpillar food plants grow, including woodland edges and other areas with shrubs or trees.
help Grey dagger FAQ
What is the scientific name of the grey dagger moth?
The grey dagger is Acronicta psi, a noctuid moth. Its grey forewings carry dark dagger-like markings that give the species its common name. [Natural History Museum](https://www.nhm.ac.uk/our-science/data/uk-species/taxon?tvk=NBNSYS0000006379)
How can you tell the grey dagger from the dark dagger?
Adult Grey Dagger and Dark Dagger moths are extremely similar and cannot usually be identified reliably from an ordinary photograph. Confirmed separation often requires examination of the genitalia, while the caterpillars are easier to distinguish. [UK Moths](https://www.ukmoths.org.uk/species/acronicta-tridens/)
What does an adult grey dagger moth look like?
It is generally grey with a dark dagger-shaped marking on the forewings and belongs to the Noctuidae family. It is associated with habitats such as woodland, hedgerows, parks, gardens, and other places with trees.
Can a phone photo confirm a grey dagger identification?
A photo can suggest Grey Dagger, but it usually cannot confirm Acronicta psi against Acronicta tridens. For a reliable species record, use a specialist guide or expert examination rather than relying only on the wing pattern. [UK Moths](https://www.ukmoths.org.uk/species/acronicta-tridens/)
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