Last modified: Feb. 22, 2020, 3:04 p.m.
A rare species throughout Belgium, mainly observed in the Kempen and the southern part.
Young caterpillars live together in a light spinning, the caterpillars later spread. Hibernates as a pupa in an underground cocoon. The adults come to light and less on sugar.
The adults fly from late March till mid May in one generation a year.
The larva lives on Quercus, gregariously when young, separately in later stages and then also on herbaceous plants and shrubs like Prunus spinosa and Crataegus.