very common species throughout Belgium.
larva feeds from a rather straight, ochreous case preferably on
Alnus glutinosa, Betula, Corylus or Ulmus.
It has also been recorded from Sorbus aucuparia, Sorbus
aria, Sorbus intermedia, Salix caprea or Carpinus
and even from herbaceous plants beneath the normal foodplants. It
adults fly from late May till the end of July.
Antwerpen, Mortsel, 25 May 2004.
(Photo © Leo Janssen)