common species throughout Belgium. It used to be more widespread and
the species shows great fluctuations from year to year.
larva lives on Urtica, at first gregariously, later
on individually. Hibernates as imago.
adults fly in two generations a year, of which the second is partial:
from the end of June till the beginning of August, and from late July
till the end of May of the next year.
Antwerpen, Malle, 29 July 2005.
(Photo © Maarten Jacobs)