Thera obeliscata
Brownish form of Zweibrütigen Pine softwood stretcher ( Thera obeliscata )
The Zweibrütige Pine Softwood tensioner ( Thera obeliscata ), also known as brown pine wood blade tensioner, is a butterfly (moth ) from the family of the tensioner ( Geometridae ).
- 5.1 Notes and references
- 5.2 Literature
Features
Butterfly
The wingspan of the butterfly is 25 to 34 mm. As for the color scheme of the front wings, they show a great variability. The base color ranges from gray-brown to reddish tints. Root zone and midfield stand out clearly and can rust-red, yellow-brown or dark brown colors show. The midfield is constricted toward the inner edge. On a hem formed of dots dark line that is sometimes indistinctly marked runs. The apex is pointed. The hind wings are gray-brown with a small black middle spot, which clearly appears on the bottom and provided a most weakly developed dark horizontal line.
Egg
The egg has an elongated shape and is yellowish to greenish. The surface is divided by grooves into irregular, studded with small warts fields.
Caterpillar
Adults caterpillars are green. They show white yellow side ridge lines and side stripes. At the rear end two small peaks can be seen.
Doll
The greenish or brownish doll is covered with whitish or yellowish longitudinal lines. The Analspitze has a reddish brown color.
Similar Species
Due to the large variability in color and similar design elements, the moths of the variables are softwood stretcher ( Thera variata ), the Sägezahnfühler softwood stretcher ( Thera britannica ), the Brown line blade tensioner ( Thera cognata ), the Grey juniper coniferous wood stretcher ( Thera juniperata ), the autumn pine softwood stretcher ( Pennithera Firmata ) and sometimes difficult to distinguish from Thera cembrae and Pennithera ulicata of some forms of Thera obeliscata. When in doubt, specialists should be held to determine rate.
Geographical distribution and occurrence
The Zweibrütige Pine Softwood tensioner is widely used in Europe, east to Siberia, south to the Caucasus. In the Alps, he can still be found at altitudes of over 1500 meters. The species prefers populated pine forests.
Way of life
The nocturnal moths fly in a first generation mainly from May to July and area, in a second period of August to October. At night they like to visit artificial light sources. The caterpillars feed on the needles of Scots pine (Pinus sylvestris). They overwinter. Pupation takes place in a thin tissue between the needles.
Endangering
The Zweibrütige Pine Softwood release occurs in Germany in all provinces and according to the Red List not compromised.