Tiszavirág (Tisza Mayfly)

Palingenia longicauda, sometimes known as the Tisza mayfly is an aquatic insect in the Order Ephemeroptera, after the European Tisza river where it is found.
The presence of P. longicauda is an indicator of clean unpolluted water. Now extinct in many European countries, it can be found mainly in Hungary on the Tisza river.