Seq # 800110010

Bena bicolorana (Fuessly, 1775) Species

Last modified: June 4, 2024, 10:10 a.m.

A fairly common species throughout Belgium, more observed in the northern part of the country.

This species is considered Least Concern according to the IUCN Red List category for Flanders 2023.


Family: Nolidae > Subfamily: Chloephorinae > Tribus: Chloephorini > Genus: Bena > Species: Bena bicolorana
Vernacular names
Grote groenuil (NL), Scarce Silver-lines (EN), La Halias du Chêne (FR), Großer Kahnspinner, Eichen-Kahnspinner (DE)
Bena quercana (Denis & Schiffermüller, 1775)
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 20 (as Halias quercana Wv.). view page




Wingspan 40–45 mm.

Museum specimens

Specimens in nature


Hibernates as a small larva on or near a bud of the food plant.
Pupates in a tough, boat-shaped cocoon on the underside of a leaf of the food plant.
The adults come to light and sugar.

No pictures yet!

Flight periods

The adults fly from late May towards early August in one generation. In favourable years a small partial second generation occurs during September, but it's seldom recorded.

Observed on

Host plant (genera):
Deciduous trees

The larva lives on Quercus or Betula.

No pictures yet!