Diacrisia sannio
Rotrandbär ( Diacrisia sannio ), male
The Rotrandbär ( Diacrisia sannio ) is a butterfly (moth ) from the family of tiger moths ( Arctiinae ).
Features
The wingspan is about 25 mm. The males are bright yellow on the top, each with a center red spot on each wing. The hind wings are white with a z.T. resolved into individual points black transverse band on the outer edge. Front and rear wings are edged with red, with the exception of the trailing edge of the rear wing. The much smaller females have orange forewings with red dots, while the hind wings are nearly black and show a red border. Eggs are laid in groups on the leaves of the food plants of the caterpillars. The single egg is yellowish - white and hemispherical. The caterpillar is black haired brown to reddish brown. It has a whitish center line with red dots. The caterpillar overwinters and pupates in spring in a cocoon on the ground. The shiny red-brown doll has a cremaster with bristles.
Habitat
You can find the Rotrandbär on moorland meadows, swamp forests, floodplains, forest edges, in plantations or forest clearings and meadows with grass cover. In the mountains it is found up to an altitude of 2,400 meters.
Development
The Rotrandbär flies in a generation or two, depending on the region and altitude. In one generation per year can be found from June to July, the adult butterflies. If there is two generations flying moths of the first brood from May to June. The moths of the second generation can then be found from July to August. The lure females during the mating season the males with a pheromone. The caterpillars of the first generation can be found from September to May and the second generation from July to August. The moths are diurnal and nocturnal. You come to light. However, the females of Rotrandbären are very slow flight. The caterpillars, however, are exclusively nocturnal. The caterpillar overwinters.
Food plants
The caterpillars feed on, among other things:
- Bedstraw ( Galium spp.)
- Plantain ( Plantago spp.)
- Dandelion (Taraxacum sect. Ruderalia )
- Fireweed (Epilobium sp. )
- Nettle (Urtica spp.)
Flight Times
The moths fly from June to July, the caterpillars occur in August and after winter to May.
Occurrence
The distribution area of Rotrandbären extends across the whole of Europe ( north to the 68th degree of latitude), across northern Asia to Japan.
Endangering
The holdings by the Rotrandbärs seem to be declining, at least regionally. In some German states, therefore the type is on the warning list (kind of in further destruction of the habitat in the future at risk ) or is already listed as endangered.