Photo © Andy Mitchell

Grey Dagger

Acronicta psi

Checklist Number
73.038 [B&F: 2284]

Verification
Record requires retention of specimen until confirmed, and may require dissection. Consult with CMR if unsure

Classification

Family:Noctuidae
Subfamily:Acronictinae
Genus:Acronicta
Species:psi
Authority:(Linnaeus, 1758)

Common in woodland, hedgerows, gardens, scrubby heathland, calcareous grassland, fens and a wide range of other habitats; low altitudes in the north throughout much of the British Isles, a species of conservation concern under the UK Biodiversity Action Plan. In Hampshire and on the Isle of Wight very much more common than Dark Dagger, but undoubtedly under-recorded. Wingspan 33-44 mm. Very similar to Dark Dagger A. tridens, from which separated only by dissection of the genitalia. The larvae of the two species are readily identifiable. Larva feeds on various broad-leaved trees and shrubs, including Blackthorn, Hawthorn, Apple, Birch, Common Lime, English Elm and Rowan, over-wintering as a pupa.

The abundance in each month is indicated as follows:

No records
Very occasional
Irregular
Uncommon
Off-peak, but not unusual
Off-peak, but not unusual
Main flight time
J F M A M J J A S O N D
Adult
Larval

Records by week (adult)

Records by week (larval)