Used to be a fairly common species throughout Belgium, but nowadays rather scarce. Usually seen in low numbers or as singletons. 

The larva lives on several species of grasses like Molinia caerulea, Deschampsia flexuosa and Nardus stricta. The eggs are dropped in flight and overwinter with the caterpillar fully formed inside the shell.

The adults fly from late June till early October in one generation a year. They are active during the day and at night. They come to light and sugar.