Last modified: July 15, 2023, 2:10 p.m.
A very rare, very local and declining species, nearly confined to some restricted peat moor areas in the eastern part of the country (e.g Hautes Fagnes, Plateau des Tailles).
The pupa hibernates among plant debris. The adults fly during the day in sunshine.
The adults fly from late April till early June. Main flight period around mid-May.