Every year from late spring to early summer, an incredible natural spectacle transforms Hungary’s Tisza River.

After three years, the larvae break for the surface and the adult mayfly appears.

After they have fully matured, mayflies have roughly three hours before they die.

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An eager male might also lie in wait atop the skin of a female that hasyet to shed.

The vast majority of mayflies die immediately after mating.

But a century ago the insects flourished in Europe’s lowland rivers.

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Photo credit: Attila Volgyi

Sources:Wikipedia,NatGeo,Cabinet of Water Curiosities

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