Idaea emarginata
Jagged edge - dwarf tensioner ( idaea emarginata )
Called The Jagged Fringe dwarf tensioner ( idaea emarginata ), also Eckrandiger small clamps or small tensioners floodplain is ( Geometridae ), a butterfly ( butterfly ) from the family of the tensioner.
Features
The moths reach a wingspan of 19 to 23 millimeters, the females are on average slightly smaller than the males. The wing edge of the front and hind wings is curled up jagged. Drawing and coloring are somewhat variable. The wings are sand -colored to light brown in color, the females are often orange. On the front wings, two clearly distinct transverse lines are present on the hind wings, only the outer transverse line. Between the two lines cross a diffuse dark brown area, the so-called middle shadow, which can also virtually absent. It is also available on the hind wings. In midfield significant Diskalflecke are formed. The boundary line on the front and rear vanes is brown and is not interrupted.
The somewhat irregular oval egg carries on the outside of a slightly irregular hexagonal grid pattern. It is initially reddish yellow to reddish brown and later at both ends and in the center a little darker.
The caterpillar is relatively compact with distinct constrictions. You will go slightly slimmer to the front end. The surface has fine warts and short bristles. The dark dorsal line is divided into two, the two lines include a fine bright line between them. The belly is olive brown, dyed the head is relatively small and dark brown.
The pupa is reddish with a shiny surface. The elytra stand out with their greenish color significantly. The tenth body segment is significantly darker. It measures 7.6 mm in length and 2.8 mm in diameter. The cremaster is about as long as it is wide at the base. There are four pairs of hook-shaped bristles available, but they are shorter than the long cremaster.
Geographical distribution
The main range of the species is in central and western European. It comes down to the south of the British Isles, southern Scandinavia and southern Finland, in Eastern Europe before to the Urals. You lack in northern Italy and Bulgaria. Outside of Europe, the species has been detected in the Altai Mountains, in Turkmenistan, Western Siberia and the Caucasus.
Habitat
The jagged edge - dwarf release occurs in wetlands, bogs and wet in mixed forests, meadows and cultivated land. The species is most common in small birch grove on the outskirts of silted marshes before, with abundant vegetation of blue moor grass ( Molinia caerulea). Exceptionally, it is also observed on dry sandy areas. In many areas, such as the low mountain ranges, the species is rare or absent. The vertical distribution extends from the plains to about 600 meters above sea level, in the Southern Alps and up to 1,300 meters.
Way of life
The species forms from one generation per year, flying the moth from June to August. In favorable regions also an incomplete second generation may occur. The males hatch about two weeks before the females. The moths rest during the day in the vegetation, but can be easily startled. They are active at dusk and early night. They are only moderately attracted to artificial light sources and only occasionally come to light. They are occasionally observed at the bait.
The caterpillars are polyphagous grow relatively slowly and eat among other things, winches ( Convolvulus ), birch (Betula ), alder ( Alnus ), hazel ( Corylus ), Labkräutern ( Galium ), plantains ( Plantago ), sedum (Sedum ), Scotch broom ( Cytisus scoparius ), Rubus, Labkräuter ( Galium ), Plantain ( Plantago ), sedum (Sedum ), Scotch broom ( Cytisus scoparius ), Vogelknöteriche ( Polygonum ) and sheep sorrel ( Rumex acetosella ). In breeding already following plants were fed: Dandelion (Taraxacum officinale), smartweed ( Polygonum aviculare ), Common groundsel (Senecio vulgaris) and garden salad (Lactuca sativa). The caterpillars overwinter.
System
The species was described in 1758 by Carolus Linnaeus under the original name Phalaena Geometra emarginata first time scientifically. It was then described in more than six additional names that are thus synonymous.
Endangering
The species is not endangered in Germany.