Photo © David G Green

Dark Dagger

Acronicta tridens

Checklist Number
73.037 [B&F: 2283]

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:tridens
Authority:([Denis & Schiffermüller], 1775)

Common in woodland, fens, gardens and a wide range of other habitats throughout much of England and Wales. In Hampshire and on the Isle of Wight very much less common than Grey Dagger, although undoubtedly under-recorded owing to similarity to that species. Wingspan 33-44 mm. Very similar to Grey Dagger A. psi, 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 Wild Rose, Cultivated Rose, Hawthorn, Blackthorn and Goat Willow, 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)