Silver owl

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Silver owl
Silver owl (Deltote bankiana)

Silver owl
( Deltote bankiana )

Systematics
Order : Butterflies (Lepidoptera)
Superfamily : Noctuoidea
Family : Owl butterfly (Noctuidae)
Subfamily : Eustrotiinae
Genre : Deltote
Type : Silver owl
Scientific name
Deltote bankiana
( Fabricius , 1775)

The silver owl , also silver streaked owl or silver-striped grass moth owl ( Deltote bankiana ) is a butterfly ( moth ) from the family of owl butterflies (Noctuidae).

features

butterfly

The moths reach a wingspan of 24 to 28 millimeters. Their forewings are light brown in basic color with two parallel white stripes that run diagonally backwards. The kidney defect is indicated as an outwardly tapered spot starting from the inner line. The ring flaw is a rounded spot that starts from the outer line and points forwards. Often there are still one or two narrow white stripes running almost parallel to the outer edge. The fringes are white, often the base of the front wings is also colored white. The hind wings are white with a brown tinge on the outer edge of the wing.

Caterpillar

The caterpillars are green, usually a little darker on top. The back line is dark green, the side back lines are white. The side lines are yellowish.

Doll

The pupa is compact, the cremaster is blunt and has two points and several bristles.

Geographical distribution and habitat

The range of the species is Palearctic and stretches from the Iberian Peninsula and France in the west to Japan and Korea in the east. However, the occurrences are often isolated like islands. In England the species is native to Cambridgeshire and Kent . In other regions, the species is regularly observed as an immigrant. In Ireland it is limited to Cork and Kerry Counties . In the north the species penetrates to the south of Sweden . In the south it is absent in Greece .

The species is a typical inhabitant of bog meadows, swampy meadows, floodplains and swamp forests. The moths are also often observed in dry locations, e.g. B. sandy soils. The silver owl occurs from the lowlands to the hilly level of the low mountain range. In the Alps it rises to around 1500 meters.

Way of life

The species forms one generation per year in most regions. The moths fly from late May to late July. In climatically favorable regions, two generations are occasionally formed that fly from May to June and then again in August. The animals can be easily scared off during the day, are primarily crepuscular, but also fly at night and come to light. The caterpillars can be found from August to October (first generation) and in July (when two generations are formed). The caterpillars feed on mainly to Rispengräsern ( Poa ), sedges ( Carex ) and Zypergräsern ( Cyperus ). Pupation takes place in a cocoon between blades of grass near the ground. The pupa hibernates.

Danger

The species is classified as potentially endangered or endangered in some German states, e.g. B. in Bavaria, Rhineland-Palatinate and Saxony (3 - endangered).

Synonyms

  • Erastria argentula Huebner
  • Erastria olivana Schiffermüller
  • Eustrotia olivana Denis & Schiffermüller, 1775
  • Eustrotia bankiana Fabricius
  • Deltotes bankiana Fabricius, 1775

swell

Individual evidence

  1. ↑ Guide to the moths of Great Britain and Ireland. Ian Kimber, accessed July 2, 2008 .
  2. ^ Sächsisches Landesamt für Umwelt und Geologie (Hrsg.): Rote Liste Eulenfalter - Status 1995. Materials on nature conservation and landscape management. , without ISBN

literature

  • Arno Bergmann: The large butterflies of Central Germany. Volume 4/2: Owls. Distribution, forms and communities. Urania-Verlag, Jena 1954, DNB 450378381 .
  • Günter Ebert (Ed.): The butterflies of Baden-Württemberg. Volume 5, Moths III (Sesiidae, Arctiidae, Noctuidae). Ulmer Verlag Stuttgart 1997, ISBN 3-800-13481-0
  • Walter Forster , Theodor A. Wohlfahrt : The butterflies of Central Europe. Volume 4: Owls. (Noctuidae). Franckh'sche Verlagshandlung, Stuttgart 1971, ISBN 3-440-03752-5 .
  • Manfred Koch : We determine butterflies. Volume 3: Owls of Germany. Neumann, Radebeul / Berlin 1958, DNB 452481937 .

Web links

Commons : Silbereulchen ( Deltote bankiana )  - Collection of images, videos and audio files