Last modified: Dec. 8, 2024, 12:49 p.m.
A rare but widespread species in Belgium, but more frequently observed in the south of the country. Sometimes in large numbers at the wintering places, usually caves.
This species is considered Endangered according to the IUCN Red List category for Flanders 2023.
Native
The adults hibernate and come to light.
The adults fly in one generation a year from July till October. They hibernate and can be observed during the following spring till May.
The larva lives on Rhamnus cathartica or Frangula alnus.