Idia calvaria
Dark brown margin Owl ( Idia calvaria )
The dark brown margin Owl ( Idia calvaria ), also referred to as riparian forest - margin Owl, is a butterfly (moth ) from the family of cutworms ( Noctuidae ).
- 6.1 Notes and references
- 6.2 Literature
Features
Butterfly
The wingspan of the moth is about 24 to 34 millimeters. The forewings are brown with blackish and gray-white interference, which are very pronounced especially at Costalrand. The outer transverse line and the wavy line are whitish and limit significantly the intervening dark brown box. Characteristic of the style are the very small, point-like ring stain and the large, clear renal blemish, each conspicuously colored yellow to yellow-brown. The kidneys stigma often run from sickle-shaped or teardrop- shaped and have small dark spots at the edges. On the gray hind wings are a clear, bright transverse line and occasionally something more fainter, blurred lines.
Egg, caterpillar, pupa
The egg is spherical, with slightly pressed- soil and a network of uniform, hexagonal mesh. Initially it is white and turns just before hatching in a yellowish hue. The caterpillar is at the juvenile stage glassy translucent, brownish- purple and grown but has black, arranged in pairs of points on each segment. The pupa is yellowish brown, dark on the abdomen.
Synonyms
- Epizeuxis calvaria
- Helia calvaria
Dissemination
The species occurs in central France, in the northern and eastern Central Europe with a focus on the Mediterranean before, also in Turkey, the Caucasus and Asia Minor. and is mainly found in woodland, river valleys and parklands. It occurs up to an altitude of 800 meters.
Way of life
The moths of the dark brown margin owl are nocturnal and fly from late June to early September. In the south occasionally occurs a second generation whose moths than those of the first are significantly smaller. You like to visit the bait and occasionally artificial light sources. During the day they rest often upside down on tree trunks, but easy to fly in danger. The caterpillars live from August to fallen, faded, withered or decaying leaves of deciduous trees or low plants, such as poplar (Populus ), willow ( Salix) or dock ( Rumex ). Kesenheimer describes characteristic behavior in breeding. Accordingly, the crawler first nate the Journal of the forage plant from one side, and later of the two. You in colonies live in the middle of a stack of sheets, where a heat and decomposition layer has formed and pupate in the middle of this center in a solid, covered with leaf residues cocoon. The caterpillars overwinter.
Endangering
The species is in Germany in many states rarely or very rarely. Often are the observations many years back, and the species is known to exist today in many places or considered extinct. On the red list of endangered species it has the status of G (assuming risk, but status unknown ) were obtained.