3.5 trillion insects migrate high across southern England skies each year – Los Angeles Times

It’s one of the biggest mass migrations on Earth, and you probably don’t even know it was happening. 

Each year, from May to September, nearly 3.5 trillion insects traverse the skies above southern England, according to a new study in the journal Science.

Together these winged travelers make up 3,200 tons of biomass. That’s the mass equivalent of a herd of 800 fairly large elephants marching past the clouds.  

And if you live in sunnier climes, like Southern California, the number and mass of insects flying over your head each year are likely to be even greater.

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