Millions of mayflies show up on Power of 5 Radar

CLEVELAND - Look out everyone! The swarm is coming! 

Millions of mayflies appeared on the Power of 5 Radar Tuesday evening. 

Mayflies don't necessarily have to hatch in May, but they do hatch in the spring time, typically in June on Lake Erie. 

Power of 5 Chief Meteorologist Mark Johnson says the large number of mayflies this year is the sign of a healthy Lake Erie ecosystem. 

Mayflies will live for several days and their sole purpose is to mate.  

The bugs' eggs will go to the bottom of Lake Erie, where they'll sit for nearly a year and we'll do it all over again!

While the mayflies can be a nuisance, they are not a danger as they do not have mouths, so they can't bite humans. 

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