Mayflies

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Long-tailed mayflies (Palingenia longicauda) mate on the surface of the Tisza river near Tiszainoka, Hungary, June 18, 2015. Photo: Reuters
Long-tailed mayflies (Palingenia longicauda) mate on the surface of the Tisza river near Tiszainoka, Hungary, June 18, 2015. Photo: Reuters
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Long-tailed mayflies (Palingenia longicauda) mate on the surface of the Tisza river near Tiszainoka,Hungary, June 18, 2015. Photo: Reuters
Long-tailed mayflies (Palingenia longicauda) mate on the surface of the Tisza river near Tiszainoka,Hungary, June 18, 2015. Photo: Reuters
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Long-tailed mayflies (Palingenia longicauda) mate on the surface of the Tisza river near Tiszainoka, Hungary, June 18, 2015. Photo: Reuters
Long-tailed mayflies (Palingenia longicauda) mate on the surface of the Tisza river near Tiszainoka, Hungary, June 18, 2015. Photo: Reuters
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Long-tailed mayflies (Palingenia longicauda) mate on the surface of the Tisza river near Tiszainoka, Hungary, June 18, 2015. Photo: Reuters
Long-tailed mayflies (Palingenia longicauda) mate on the surface of the Tisza river near Tiszainoka, Hungary, June 18, 2015. Photo: Reuters
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Long-tailed mayflies (Palingenia longicauda) mate on the surface of the Tisza river near Tiszainoka, Hungary, June 18, 2015. Photo: Reuters
Long-tailed mayflies (Palingenia longicauda) mate on the surface of the Tisza river near Tiszainoka, Hungary, June 18, 2015. Photo: Reuters