Büttner's slant-winged owl

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Büttner's slant-winged owl
Sedina buettneri.jpg

Büttner's crooked owl ( Sedina buettneri )

Systematics
Class : Insects (Insecta)
Order : Butterflies (Lepidoptera)
Family : Owl butterfly (Noctuidae)
Subfamily : Xyleninae
Genre : Sedina
Type : Büttner's slant-winged owl
Scientific name
Sedina buettneri
( Hering , 1858)

Sedina buettneri ( Sedina buettneri ) is a butterfly ( moth ) from the family of cutworms (Noctuidae).

features

butterfly

The wingspan of the moth is about 20 to 35 millimeters. The forewings are usually gray-yellow in color, but can vary widely and are sometimes slightly dusty pink on the edge and on the veins, but otherwise without any noticeable markings. The fore wings are narrow, have a pointed apex and darker protruding veins. In the middle of the wing there is occasionally a thin, dark longitudinal line. The outer transverse line is often indicated by a few small black dots. The hind wings are gray-yellow with slightly pink dusty veins, which distinguishes the species from other reed owl species. The following color variations have been described:

  • f.rufescens Urbahn, with reddish yellow forewings
  • f.obscura Haeger, with bluish gray wings

Egg, caterpillar, pupa

The egg is spherical, has several fine longitudinal ribs and is white to yellowish in color, later reddish yellow. The caterpillar is pale yellow, slender and has broad, reddish to lilac-brown side ridges and side lines, partly dissolved in spots. The elongated pupa has strikingly short wing sheaths.

Geographical distribution and habitat

Büttner's slant-winged owl has a transpalearctic distribution. Except in Europe, it is found sporadically in many parts of Asia, the Black Sea coast, at the foot of the Caucasus , in the Caspian Sea and Iran, as well as in Russia and further east on the Urals, the Baikal and Altai regions in Japan and the Kuriles . It is tied to humid areas and prefers fresh water areas, river banks, coastal regions, pond edges, wet meadows, swamp areas and dense forests near water, where it is sometimes common.

Way of life

The species is univoltin , which means that only one generation is formed per year. The moths fly from late August to late October. In Baden-Württemberg, the short flight time lasts only three weeks each year. They are nocturnal and are particularly attracted to artificial light sources , but do not fly long distances to reach them. For bait they almost never come when they only a short proboscis own. In late autumn, the females lay the eggs on the leaves of the forage plant that have turned down in rows of 6 to 20 pieces. These then overwinter. In the spring of the following year, the newly hatched young caterpillars initially feed on mining, preferably on the leaves of the swamp sedge ( Carex acutifornis ), occasionally also on swaths of water ( Glyceria aquatica ). Later, the caterpillar eats head down in the stalks, partly below the surface of the earth or even below the water level. In July pupation takes place upside down in the eroded stems. The moths hatch in the morning and crawl up Carex and reed stalks at dusk .

Danger

Büttner's slanted-winged owl occurs in all federal states in Germany with different frequencies, can be numerous in very limited places and is classified in category 3 (endangered) on the Red List of Endangered Species .

swell

Individual evidence

  1. ↑ a b c Alberto Zilli, Lázló Ronkay, Michael Fibiger: Noctuidae Europaeae Volume 8, Entomological Press, Søro 2005, ISBN 87-89430-09-3
  2. ↑ Manfred Koch: We identify butterflies. Volume 3: Owls. 2nd, expanded edition. Neumann, Leipzig / Radebeul 1972, DNB 760072930 .
  3. ↑ Walter Forster , Theodor A. Wohlfahrt : The butterflies of Central Europe. Volume 4: Owls. (Noctuidae). Franckh'sche Verlagshandlung, Stuttgart 1971, ISBN 3-440-03752-5 .
  4. ↑ a b c Günter Ebert (Ed.): The Butterflies of Baden-Württemberg Volume 7, Nachtfalter V. Ulmer Verlag Stuttgart 1998, ISBN 3-8001-3500-0
  5. ↑ E. and H. Urbahn: The butterflies of Pomerania. Entomological Association in Stettin 100th year 1939
  6. ↑ Federal Agency for Nature Conservation (Ed.): Red List of Endangered Animals in Germany. Landwirtschaftsverlag, Münster 1998, ISBN 3-89624-110-9

literature

  • Günter Ebert (Ed.): The butterflies of Baden-Württemberg Volume 7, Nachtfalter V. Ulmer Verlag, Stuttgart 1998, ISBN 3-8001-3500-0
  • Manfred Koch : We determine butterflies. Volume 3: Owls. 2nd, expanded edition. Neumann, Leipzig / Radebeul 1972, DNB 760072930 .
  • Alberto Zilli, Lázló Ronkay, Michael Fibiger: Noctuidae Europaeae Volume 8, Entomological Press, Søro 2005, ISBN 87-89430-09-3

Web links

Commons : Büttner's oblique winged owl  - album with pictures, videos and audio files