Last modified: June 4, 2024, 4:21 p.m.
A rather common species throughout Belgium.
Data Deficient due to a lack of sufficient data according to the IUCN Red List category for Flanders 2023.
Native
Wingspan 22–25 mm.
Genital control is necessary only for the darker colored specimens in this species for positive identification, see O. latruncula Linnaeus, 1758 and O. versicolor (Borkhausen, 1792).
Hibernates as a larva and pupates among the roots of the food plant.
The adults come to light and sugar.
The adults fly in one generation a year: from mid-May till late August.
The larva lives in the roots and stems of various grasses like: Dactylis glomerata, Elytrigia repens or Phalaris arundinacea.