Last modified: March 6, 2022, 5:12 p.m.
Not so rare in the southern part of Belgium, especially the limestone area, elsewhere a rare species.
The adults fly in one generation a year; from late June till mid September. They come to sugar and less to light.
The larva lives on Quercus. Hibernates as an egg attached to an oak twig, probably high up in the canopy. Pupates in a cocoon between leaves or on the trunk.