Last modified: Aug. 18, 2020, 9 p.m.
A rather common species in Belgium with most records in the northern part of the country.
Larvae feed in buds and catkins of the host plant. Hibernation in a male catkin, causing some sort of distorted growth at the top. The larva ejects frass through a small hole.
The adults fly from early June till mid August. They come to light.
Shoots or catkins of Betula spp. or Alnus glutinosa.