Last modified: Sept. 16, 2023, 2:42 p.m.
A very rare and local species in Belgium. Small populations still exists in the south of the country, elsewhere in the country as a vagrant. Bound to limestone habitats.
The dark form scirpi Duponchel, 1836 used to be considered a separate species, but more recent research has shown that it is just an individual form of Mythimna sicula that occurs in different populations in different percentages.
However, because both forms are distributed somewhat differently (in some areas only one of them occurs), because a number of regional taxa have been described (albivena, bavarica, belgiensis, dactylidis, montium, etc.), which further dilute the picture, and because the stages of development are not yet sufficiently known, further investigations (e.g. DNA taxonomy) are definitely desirable.
Hibernates as a pupa. The adults come to light.
The adults fly from mid-May till July in one generation a year.
Sometimes a partial second generation occurs during August-September.
The larva lives probably on various species of Gramineae, but their biology is unsufficient known yet.