Last modified: Dec. 1, 2020, 3:23 p.m.
A fairly common species throughout Belgium.
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 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. They come to light.
The larva lives mainly on Quercus or Betula, but also on other deciduous trees including: Ulmus, Corylus and Populus tremulus.