Last modified: May 29, 2021, 2:12 p.m.
A rather common species throughout Belgium, sometimes in great numbers.
The larva feeds sumerged between loosely spun leaves of several water plants. It hibernates. Pupation takes place in a cocoon attached to a water-plant below the surface of the water. The pupa does not protrude the cocoon. The adults live on the average only two days. They rest at the base of water-plants or on floating material during the day. Males and winged females come to light. Wingless females stay below the surface of the water. Adults come to light.
One long generation a year: from the end of May till mid September, most abundant in the second half of August.