Dicycla oo
Oak Nulleneule ( Dicycla oo ), male
The Oak Nulleneule ( Dicycla oo ) is a butterfly of the family of cutworms ( Noctuidae ).
- 5.1 Notes and references
- 5.2 Literature
Features
Butterfly
The wingspan of the butterfly is from 32 to 39 millimeters. The color spectrum of the forewing is very extensive and has sulfur- yellow, ocher yellow, brownish or reddish tints on. Some specimens show a darkened hem and root field. The bright extreme Saumrand is crossed by dark veins. Pin and ring stain are round and are close together, which has led to the scientific name oo or name part " Nulleneule ". The English name of the species "Heart Moth " refers, however, to the heart-shaped kidney blemish. The hind wings are whitish. The antennae of the males are furnished with double comb teeth, those of the females are thready. The proboscis is well developed. The females have a slightly longer abdomen with protruding ovipositor.
Egg
The hemispherical egg is slightly flattened at the base and covered with a distinct network. It has a light yellow color with a green tinge.
Caterpillar
Adults caterpillars have a reddish-brown. The broad white dorsal line is resolved into points. The yellow- white side stripes are also dissolved and wide in points. The side ridge lines are white and very narrow.
Geographical distribution and habitat
The Oak Nulleneule comes in Europe locally. In the north, it is usually rare, and in the South often. They also can be found in Turkey, Transcaucasia and the Caucasus, Israel, Iran and Iraq. In the Alps, it rises to heights of 1200 meters. The animals colonize mainly open oak forests.
Way of life
The univoltinen moths are crepuscular and nocturnal and live from June to August. You like to visit scale bait, they visit before dusk and at night also appear to artificial light sources. The living May-June caterpillars feed on the leaves of oak species (Quercus ). Keep yourself preferably between leaves spun together. Overwintering stage is the egg.
Endangering
The Oak Nulleneule was still regional basis proliferates until the mid 20th century in Germany. Since then, however, a significant decline has occurred. Therefore, it is now usually rare or have disappeared and will ( "endangered" ) on the red list of endangered species in category 3 out.