Long-tailed mayflies (Palingenia longicauda) fly over the surface of the Tisza river near Tiszainoka, 135km (84 miles) southeast of Budapest, on June 20, 2012. Millions of these short-lived mayflies engage in a frantic rush to mate and reproduce before they perish in just a few hours during “Tiszaviragzas” or Tisza blooming season from late spring to early summer every year. (Photo by Laszlo Balogh/Reuters)
