Last modified: Aug. 18, 2020, 9:13 p.m.
A common species throughout Belgium.
The adults fly from late June till the end of September, sometimes well into October. They occasionally come to light.
The larva lives in a shoot or in the catkins of Betula spp. or Alnus glutinosa, sometimes congregating under bark in the spring. The larva hibernates. Pupation in a cocoon in or under the bark.