Last modified: March 14, 2021, 7:03 p.m.
A common species throughout Belgium.
The adults fly from the beginning of July till mid September, sometimes till mid October. They fly at dusk and come to light.
The 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.