Last modified: Feb. 19, 2021, 2:10 p.m.
A fairly common species in Belgium.
The larva makes a leafmine usually starting close to the midrib or near the leaf edge on the upper- or underside of small-leaved willows. Pupates in a dark reddish brown cocoon covered with fluffy silk.
The adults fly in two generations a year: during May and June and again in September.