An uncommon species in Belgium.
larva feeds on the ripening seeds within the capsules of Stellaria holostea.
At final instar, the larva spins a portable trivalved case. This is
used as a temporary habitation, some larvae may continue to feed from
the case while others use it only for protection in their journey to
the pupation site. This is usually a tree trunk into which the larva
bores, leaving its case attached to the entrance hole.
adults fly in one generation a year; from the first week of May till
June. It flies over the food plant during sunshine and rest on the
flowers. Later they come to light.
Namur, Hour, 05 May 2010.
(Photo © Jean-Yves Baugnée)