Last modified: Jan. 22, 2021, 5:06 p.m.
A rather rare species throughout Belgium.
See also bladmineerders.be
The adults fly in two generations a year from May till June and again during August. They come to light.
The larva lives under a slight silken web on the upperside of the leaves of Betula. It pupates in a dense white cocoon on or close to the ground.