Last modified: Jan. 12, 2021, 2:03 p.m.
A rare species in Belgium, but observed in many places.
The larva has been found boring in young shoots, causing withered leaves and occasionally swellings. Pupation normally in the shoot, occasionally outside.
During the day the adults rest on bark in crevices and later come to light.
The adults fly from late July till September.
The larva lives exclusively on Quercus.