rather common species throughout Belgium, bound to wet biotopes.
larva lives in the stem of the rootstock of Phragmites or
Glyceria maxima, sometimes even below the water-level. It
hibernates. Pupation in the stem near water-level, making below
an exit window.
adults fly from the beginning of May till the beginning of September.
Most abundant in mid July. They are active at night and come
Antwerpen, Viersel, 04 July 2003.
male (Photo © Leo Janssen)