A common species throughout Belgium.

The larva makes large, whitish mines on the upper surface of Quercus leaves, sometimes also on Castanea, occasionally several mines can be found on one leaf. Pupation takes place in a round chamber constructed in the larval feeding place. The pupa hibernates.

The adults fly in May and June. During favourable years, a second generation develops of which the moths are on the wing in August. The moths come to light.

ID mine: a flat whitish blotch on top of leaf, the mine is lined with silk and is free of frass, which is ejected through a slit at the edge of the mine.