Drymonia querna ([Denis & Schiffermüller], 1775)

Host plants:
The caterpillars feed on oak (Quercus).

Habitat:
Drymonia querna inhabits warm and often also dry oak-rich woodlands and scrub more in the lowlands.

Life cycle:
The pupa hibernates and the moths are on the wing in most often two generations between May and August. The larvae are recorded in June/July and again in August/September. I observed a fully-grown larva together with an egg of Marumba quercus in N-Spain (Lleida, moth without hibernation) in late July 2013.

Endangerment factors:
Drymonia querna is endangered north of the Alps because warm open oak woodland is in decline there due to often profit-maximizing forestry and other factors.

Remarks:
Drymonia querna occurs in Southern and Central Europe and Western Asia.