Long-tailed mayflies (Palingenia longicauda) mate on the surface of the Tisza river near Tiszainoka, Hungary. 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. Picture: REUTERS/Laszlo... - http://dendroica.tumblr.com/post...