Noctuidae: Acronictinae

08777 Grey Dagger Acronicta psi, (Linnaeus, 1758)

BF2284 (ABH73.038)


General Information

This species cannot be readily distinguished as an adult from the Dark Dagger, A. tridens, except by examination of the genitalia. The larvae are, however, quite different.


Pupates in a crevice in tree bark.

Overwinters as Overwinters as a pupa.
Both sexes come to light.

Forewing length: 17-20mm.
Foodplant(s): Blackthorn (Prunus spinosa), hawthorns (Crataegus spp.), Apple (Malus domestica), birches (Betula spp.), lime (Tilia spp.), elms (Ulmus spp.), Rowan (Sorbus aucuparia), broadleaved trees, broadleaved shrubs
Flying: One/two generations, mid May-August and September-October
UK Presence: Resident
National status:


Woodland, fens and gardens.

Regional Information

There are no records in the system yet in Bulgaria.

Similar Species
Dark Dagger Acronicta tridens

Larva Type:
With lumps, bumps or horn(s)
yellow, black, red, white
No. of Proleg Pairs: