very rare and very local species in Belgium, only known from a few localities
in the southern provinces. Declining!
larva lives on Crataegus and Prunus spinosa. On most
occasions the larvae feed gregariously from a communal silken web. Hibernates as pupa several times.
adults fly from late February till early April. They are active at night and come to light.
Luxembourg, 26 March 2005.
(Photo © Chris Steeman)