Last modified: Jan. 28, 2020, 7:46 p.m.
A very common species throughout Belgium, sometimes as a pest in orchards.
The adults fly from late October till end of December, but occasionally can be seen till February, depending on mild conditions. The beginning and end of the flight period changes from year to year and is depending on weather conditions. During frost, the males doesn't fly and they just sit still on tree trunks, mainly on Quercus.