In the biological nomenclature, the Apollo butterfly is listed under the name Paranassius apollo. In the Lower Moselle valley, the subspecies Paranassius apollo vinningensis lives mainly in the steep vineyards between the municipality of Winningen and neighbouring Kobern. For a long time, the Apollo butterfly symbolised the successful coexistence of ecology and viticulture. But now the butterfly species is seriously endangered. New pesticides that have been used in viticulture for the past ten years are said to be to blame. On closer inspection, however, the connections are much more complex.