Last modified: June 6, 2020, 4:22 p.m.
A very rare and local species in Belgium. Hitherto only known from the southern part of the country. Vulnerable.
The adults fly in one generation a year; onwards from mid May till August.
The larva lives on several species of Gramineae like Brachypodium, Calamagrostis and Elymus. Hibernates as a small larva in a cocoon attached to the food plant.