A not so common species in Belgium.

The larva makes an oval mine on the underside of Salix caprea. Its fairly large, variously positioned on the leaf, the upper surface strongly puckered and the underside covered by small creases, but often being hidden by the leaf hairs. Pupation inside the mine in a golden brown pupa in a large golden silken cocoon. The pupa of the second generation hibernates.

The adults fly in two generations a year; during May and June and again in August. They come to light.