Scalloped Hazel
Double tooth tensioner ( Odontopera bidentata )
The double toothed tensioner ( Odontopera bidentata ), also called tooth rim tensioner, is a butterfly (moth ) from the family of the tensioner ( Geometridae ).
- 6.1 Notes and references
- 6.2 Literature
Features
Butterfly
The moths reach a wingspan from 33 to 45 millimeters. The front wings are gray-brown in the rule. The same color midfield is bordered by blackish transverse lines, which are often applied white. At the hem below the apex two for the characteristic butterfly, protruding teeth are visible. Even the scientific name of the species is derived from this feature from the Latin: to = " twice " and dentate = " serrated ". The outer dark transverse line of the forewing is continued on the hind wings. All wings each show an annular dark spot, which is also seen on the wing undersides. The thorax is very hairy.
Caterpillar
Adults caterpillars have a brownish color. However, other color variations occur. Characteristic are two small bumps on the penultimate segment and two dark, capsule-like projections on the head.
Geographical distribution and habitat
The double toothed tensioner comes in its nominate almost all over Europe to the Urals before. He is also disseminated through Siberia and the Amur - Ussuri region to the Kuril Islands and Japan. He settled preferably deciduous, mixed, breakage and bog forests and parklands.
Way of life
The numbers that appear in a generation moths are nocturnal. The main flight period falls in the months of May and June. You like to visit artificial light sources. The caterpillars live from June to September polyphagous on the leaves of a variety of plants, for example, on blackthorn (Prunus spinosa), mountain ash (Sorbus aucuparia ) and Common Spruce ( Picea abies ) and oaks ( Quercus ), birch (Betula ), poplar (Populus ), alder ( Alnus ), willow ( Salix) or rear cherry species ( Lonicera ). The species overwinters as a pupa.
Endangering
The double toothed tensioner is found in all German federal states and is classified as endangered.
Subspecies
The following subspecies are known:
- Odontopera bidentata bidentata ( Clerck, 1759), in Europe
- Odontopera bidentata exsul Tschetverikov, 1904, in East Asia
- Odontopera bidentata kurilana Bryk, 1942, on the Kuril Islands