Last modified: Nov. 19, 2021, 4:56 p.m.
A fairly common species throughout Belgium.
The adults have been observed from late April till mid June. The moths are active around Betula trees at dusk and occasionally come to light.
The larva lives in a catkin of Betula spp. It hibernates full-fed from October in a cocoon spun in a bark crevice. Pupation in the cocoon.