Fagivorina arenaria
Mottled bark tensioner ( Fagivorina arenaria )
Called The Scheckige beef tensioner ( Fagivorina arenaria ), also Mottled Oak beech - bark tensioner or beech - bark lichens tensioner, is a butterfly (moth ) from the family of the tensioner ( Geometridae ).
- 5.1 Notes and references
- 5.2 Literature
Features
Butterfly
With a wingspan 22-30 millimeters count the butterflies to the smaller beef tensioner species. The whitish forewings show a very contrasting blackish pollination. Especially the middle shade as well as the inner transverse line are heavily obscured. Some drawing elements can also accept reddish or brownish shades. The fringes are checkered black and white. Characteristic are two or three dark spots on the inner edge of the hind wings. Their hem contains some crescent-shaped drawing elements. In addition, a faint center line and a slightly indicated center are available. The antennae of the males are strong on both sides combed, those of the females are thready.
Egg, caterpillar, pupa
The egg is initially colored monochrome green and later takes an additional reddish dotting on. It has an oval shape, and honeycomb-like on the surface, shallow depressions.
Adults caterpillars are of a grayish brown or reddish-brown color. On the second segment are poorly developed, lateral cusps to recognize black hump on the fifth segment. On the back and in the front and rear areas are bright caret.
The red-brown doll has two divergent peaks at the elongated cremaster.
Similar Species
Due to the very distinctive drawing the moths are unmistakable.
Geographical distribution and occurrence
The distribution area of the Mottled bark tensioner extends through large parts of Central Europe to the Balkans and Ukraine. In the south, it occurs to Sicily, in the north to Sweden and Norway. In the Alps, it rises to a height of 1500 meters. The species prefers inhabited beech forests or mixed forests.
Way of life
The moths are nocturnal and fly artificial light sources, sometimes bait. Main flight period are the months of May to July. The caterpillars live from July to September primarily on European beech (Fagus sylvatica), and occasionally on oak (Quercus ) and other deciduous trees. The pupae overwinter.
Endangering
The species occurs in the German states in different numbers before, is usually very rare, true regional basis and is therefore classified as missing on the Red List of endangered species in category 1 ( threatened with extinction ).