Our only moth with aquatic larvae. The larvae feed underwater, making a portable case from plant fragments.
Aquatic plant foliage, including pondweed and Canadian waterweed.
Branched gills on body's surface. Feeds on aquatic plants underwater. Portable cases made from plant fragments bound together with silk.
Pupates in case.
December to March. Flies at night, attracted to light, often far away from water.
6 - 10mm