Last modified: Oct. 2, 2021, 7:57 p.m.
A fairly common species throughout Belgium.
Adults of Acronicta cuspis, Acronicta tridens and Acronicta psi cannot be safely distinguished from each other, except by reference of the genitalia. Allthough larvae of these species are quiet different and are easy to identify as species.
Hibernates as a pupa in a loose grey cocoon under loose bark, in a crevice or in decayed wood. The adults come to light and sugar.
The adults fly in two generations a year from mid April towards mid September.
The larva lives on a wide range of broadleaved trees and shrubs, including Prunus spinosa, Crataegus, Malus, Betula, Tilia, Ulmus, Sorbus etc...