Seq # 500920010

Schoenobius gigantella (Denis & Schiffermüller, 1775) Species

Last modified: Aug. 20, 2021, 12:39 p.m.

A not so common and local species in Belgium, more observed in the north of the country.


Family: Crambidae > Subfamily: Schoenobiinae > Genus: Schoenobius > Species: Schoenobius gigantella
Vernacular names
Rietsnuitmot (NL)
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 22. view page




The difference between sexes (in addition to the different body-wing ratio) is by the length of the antennae: ♂ antennae are about half as long as the wings, with ♀ significantly shorter.

Museum specimens

No pictures yet!

Specimens in nature

Flight periods

The adults have been observed from June till August. They fly at dusk and later come to light.

Observed on

Host plant (species):
Glyceria maxima
Host plant (genera):

The larva feeds on the young shoots of Phragmites or Glyceria maxima, often below the surface of the water. When it has finished feeding in a stem it cuts off a piece of reed about its own length and floats on this on the surface of the water until it reaches a new stem. Pupation in a stem below a prepared exit-hole.

No pictures yet!