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73.037 ~ 2283 ~ Dark Dagger ~ Acronicta tridens
UK Status

Resident. Common S. Local N.

Montgomeryshire Status

Probably a fairly common species (see note for the Dark/Grey Dagger agg.).

Wingspan :  M & F, 35-43mm.

Confusion species

Grey Dagger.
Flight time (Montgomeryshire)


Many habitats, especially woodland and fens.


A wide range of broadleaf trees and shrubs.

Lifestage data

Overwinters as a pupa in a cocoon spun under loose bark, in a crevice or under rotten wood. Larva July-October.
Montgomeryshire photos

Photo by DB, 15th July 2012, Middletown

Photo by DB, 15th July 2012, Middletown
Pic shows male genitalia