Two long-tailed mayflies  are seen on the river Tisza

Two Long-tailed mayflies (Palingenia longicauda) are seen on the river Tisza in Tiszakurt, a village in Jasz-Nagykun-Szolnok County, central Hungary, on June 16, 2017. Millions of the short-lived mayflies engage in a frantic rush to mate before they perish in just a few hours during Tisza blooming season from late…