Idaea humiliata
Braunrandiger dwarf tensioner ( idaea humiliata )
The dwarf called Braunrandige tensioner ( humiliata idaea ), also Rotrandiger steppe pasture tensioner or restharrow small tensioner, is a butterfly (moth ) from the family of the tensioner ( Geometridae ).
Features
The moths have a wingspan of 14-19 mm, the females are slightly smaller on average. The front edge is consistently colored red or reddish brown to the apex. The color is more intense when the development proceeds at a higher moisture and low temperatures. The wavy cross lines are gray, with many copies of the outer transverse line is most pronounced. The Diskalflecken are almost always present, clearly demarcated and black. The mean transverse line runs very close to the Diskalfleck.
The reddish egg is oval and finely divided. The caterpillar is relatively short and stocky. It is brown, its surface is covered with fine long warts. The pupa is reddish brown and has a dark dorsal line on.
Geographical distribution and habitat
The species is widespread in southern and central Europe. In the north it extends to southern Scandinavia, in the east to the Urals. The only occurrence in England on the Isle of Wight has gone out since 1931. The earlier evidence in North Africa belong to the closely related species idaea bigladiata. The vertical distribution extends north from the plains up to about 700 m above sea level, in the Southern Alps to about 1500 m. In southern Europe and Asia Minor the nature rises up to 2000 m altitude. The species occurs in gardens, lawns and shrubberies as well as in rock corridors, semi-dry grasslands and screes.
Phenology and life
The moths fly in a single, long generation from late May to late August. Only rarely a partial second generation is formed, whose moth fly from mid-September to early October. They are nocturnal and are attracted by artificial light sources. The females leave the eggs simply drop into the grass. The caterpillars were the ordinary horseshoe vetch ( Hippocrepis comosa ) and broadleaf thyme (Thymus pulegioides ) found, however, no evidence that the caterpillars have eaten it. As more food crops are: the Spiny rest-harrow ( Ononis spinosa) and finger herb ( Potentilla ).
System
The species was described in 1767 by Johann Siegfried Hufnagel as Phalaena humiliata first time. Michael Denis Johann Ignaz and Schiffermueller described the type 1775 as Geometra ossearia; this name is therefore a junior synonym of idaea humiliata.
Endangering
The species is generally not at risk in Germany. However, the situation is somewhat different in some states dar. In Mecklenburg- Western Pomerania, Lower Saxony and North Rhine -Westphalia, the species is considered endangered ( category 2), in Saxony as endangered ( category 3).