So far an uncommon species in Belgium.

The shiny round egg is laid on the underside (contrary to the other Quercus feeding Ectoedemia's) on Quercus. The monophagous larva creates a twisted gallery and ends rarely in a second blotch. The feeding causes a green island in the autumn and mines can be often be found in fallen leaves. Pupation outside the mine in a yellowish brown cocoon. 

The adults fly in one generation a year during June and July. Can be found resting during the day on oak trunks.