Seq # 900310080

Acronicta tridens (Denis & Schiffermüller, 1775) Species

Last modified: Sept. 7, 2023, 2:28 p.m.

A not so common species throughout Belgium.


Family: Noctuidae > Subfamily: Acronictinae > Genus: Acronicta > Subgenus: Triaena > Species: Acronicta tridens
Vernacular names
Drietand (NL), Dark Dagger (EN), Le Trident (FR), Dreizack-Pfeileule (DE)
First mention in Belgium
De Sélys-Longchamps E. 1844. Énumération des insectes Lépidoptères de la Belgique. — Mémoires de la Société royale des Sciences de Liége 2: 1–35. On page 10 (as Acronycta tridens F.). view page




Wingspan: 35–45 mm.
Adults of Acronicta cuspis, Acronicta tridens and Acronicta psi cannot be safely distinguished from each other, except by reference to the genitalia. Although larvae of these species are quite different and are easy to identify as species.

Museum specimens

Specimens in nature



From May till October.

No pictures yet!


The species hibernates, sometimes for several years as a pupa under bark or in bark crevices of the foodplant.
The adults come to light and sugar.

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Flight periods

The adults fly in two generations a year: from mid-April till the beginning of September.

Observed on

Host plant (species):
Prunus spinosa
Host plant (genera):
Crataegus, Quercus, Rosa, Salix and Cotoneaster
Deciduous trees and Shrubs

The larva lives on a range of trees and shrubs like Crataegus, Prunus spinosa, Salix, Quercus, Rosa, and Cotoneaster.

No pictures yet!