Host plants:
The larvae are polyphagous on deciduous woods. But they consume also other insects (caterpillars, aphids and others).
Habitat:
Cosmia trapezina is found ubiquitously in grove-rich habitats of all kinds (from forests to gardens).
Life cycle:
The egg hibernates and the caterpillars develope until June. Moths can be observed from late June to August or September.
Remarks:
Cosmia trapezina is very common and widespread in Europe. In addition, it occurs in Asia Minor and the Caucasus.