Seq # 903190010

Eurois occulta (Linnaeus, 1758) Species

Last modified: Aug. 18, 2020, 9:51 p.m.

A very rare species throughout Belgium, most observations are from the east. Outside this area are vagrants.


Family: Noctuidae > Subfamily: Noctuinae > Tribus: Noctuini > Genus: Eurois > Species: Eurois occulta
Vernacular names
Grote bosbesuil (NL), Great Brocade (EN), L'Occulte (FR), Graue Heidelbeereule (DE)
First mention in Belgium
De Sélys-Longchamps E. 1844. Énumération des insectes Lépidoptères de la Belgique. — Mémoires de la Société royale des Sciences de Liége 2: 1–35. On page 12. view page




Museum specimens

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Specimens in nature


The larva feeds mainly at night.

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Hibernates as a small larva. Pupates in moss or plant debris on the surface of the soil, without a cocoon. They come especially to sugar in numbers and also to light, usually late at night.

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Flight periods

The adults fly in one generation a year: from mid June till early September.

Observed on

Host plant (species):
Myrica gale
Host plant (genera):
Betula, Salix and Vaccinium
Herbaceous plants

The larva lives on Myrica gale, Vaccinium, Salix, Betula and various herbaceous plants, especially in the later instars after overwintering.

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