Last modified: May 17, 2021, 4:19 p.m.
A rather common species throughout Belgium.
Case oval, constructed from 5–6 pairwise similar crescent-like leaf particles, 10–11 mm.
Oviposition in the female catkins of mainly Salix cinerea. The young larva bores into the catkins of various Salix species. The later stages live on fallen Salix leaves on the ground, from a flat bivalved case. It overwinters twice, sometimes three times. Pupation in the case. The males are active in sunshine and swarm around the tops of blossoming Salix trees during springtime. Females rest in the lower vegetation.
The adults fly from mid-April till early May when the Salix trees show their catkins.
Alluvial forests, wetlands or river landscapes.