common species throughout Belgium.
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
adults fly from late June till the end of September. They occasionally
come to light.
Antwerpen, Mortsel, 16 July 2003.
(Photo © Leo Janssen)