Last modified: Jan. 8, 2021, 10:44 a.m.
A fairly common species throughout Belgium.
Hibernates as an egg in bark crevices. Pupation in a cocoon among plant debris or under the ground. The adults come to sugar, wineroping and to light.
During the day, they can be found in hollow trees, buildings, behind bark or in nest-boxes, often in group and sometimes together with A. pyramidea.
The adults fly in one generation a year: from mid July till end of September, occasionally later.