Last modified: May 29, 2020, 7:26 p.m.
A rather common species throughout Belgium.
The caterpillars of Clostera curtula and Clostera pigra cannot be distinguished habitually! Breeding up to the moth is necessary for a safe determination.
The adults fly in two generations a year; from mid April till the end of May and again from July till mid August. They come to light.
The larva lives on Salix and Populus, especially on Populus tremula. Pupates between spun leaves of the food plant.