Last modified: Oct. 25, 2023, 5:58 p.m.
A common species in the northern part of Belgium, elsewhere rather rare.
See also bladmineerders.be
The larva constructs an irregular, oval, portable case of leaf fragments of the food plant. The case contains air but the larva lives under the water surface.
Pupation in a dense oval cocoon of white silk covered with leaf fragments attached just below the water surface.
The males fly at dusk over the surface of the water, females are active at night. Both sexes come to light.
The adults fly usually from May towards September, occasionally later.
The larva lives on Lemna.