Last modified: April 12, 2020, 10:25 a.m.
A very rare and local species in Belgium, only known from the southern part of the country.
The adults fly in one generation a year; onwards from mid March, but usually from mid April till late May. They come to light.
The larva lives mainly on Betula, mainly on older trees and rarely on Alnus. Hibernates as a pupa in a tough cocoon underground.