local species in Belgium, mainly observed in the northern provinces.
larva lives in a catkin of Betula, Alnus glutinosa or Salix
caprea. It hibernates and pupates in a cocoon amongst leaf-litter
on the ground.
adults fly in June and July. They rest high in the trees during
daytime. Towards dusk, they fly high about the trees and later come
Limburg, Kinrooi, 13 June 2004.
(Photo © Chris Steeman)