common species throughout Belgium.
caterpillar lives inside the fruit of Quercus, Castanea or Juglans.
When the fruit falls to the ground, it leaves it and spins a cocoon in
the soil, in which it overwinters full-fed.
adults fly from the beginning of July till mid September. They fly at
dusk and come to light.
Antwerpen, Viersel, 12 July 2005.
(Photo © Maarten Jacobs)