A common species throughout Belgium, sometimes in great numbers.

The larva feeds between loosely spun leaves of Elodea, Potamogeton, Chara or other water-plants, at depths up to 5 cm. It hibernates. Pupation takes place in a cocoon attached to a water-plant below the surface of the water.

The adults, who live only two days, fly from the end of May till mid September. Most abundant in the second half of August. 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.