Belgium, this very rare species is only known from some localities
in two southern provinces. Populations can fluctuate considerably from
year to year.
larva lives on Anthyllis, Dorycnium, Lotus or Onobrychis.
adults fly in July and August. They are active during the day. This
species is noted for its late afternoon aggregations.
Luxembourg, Virton, 17 July 2004.
(Photo © Chris Steeman)