very rare and local species throughout Belgium. Numbers can fluctuate considerably from year to year.
Declinig in many places.
larva lives mainly on Chamerion angustifolium and also on Galium. Hibernates as pupa underground, it suffers from the wet winters when many die.
The adults fly in two generations a year; from end April till September. Most
adults have mainly been observed from July till August. They are active from dusk onwards, visiting flowers and later come to
West-Vlaanderen, Deerlijk, 19 August 2003.
(Photo © Frans Vandemaele)