from most areas in Belgium, but not very common.
larva feeds inside the nuts of Fagus sylvatica.
When the nuts fall, it vacates the nut and constructs a cocoon in which
it hibernates. The larval stage may last for two years. Pupation takes
place in a cocoon spun in the soil, in litter, in rotten wood or under
bark or moss.
adults have been observed from early June till the end of August. The
moths are active in the evening and later come to light.
Antwerpen, Kapellen, 19 July 2006.
(Photo © Chris Steeman)