Last modified: Sept. 15, 2023, 1:30 p.m.
A fairly common species throughout Belgium.
Native
Hibernates as a pupa, in a tough boat-shaped cocoon either on the underside of a leaf of the food plant or in a bark crevice. The adults come to light.
The adults fly usually in one generation a year; from May till begin of July. In favourite conditions, a smaller second generation occurs from end of July till begin of September.
The larva lives mainly on Quercus or Betula, but also on other deciduous trees including: Ulmus, Corylus and Populus tremulus.