Insects

Horticulture Day
4:51 pm
Fri July 25, 2014

Millions of Mayflies Emerge in Northeast Iowa

On July 20 the National Weather Service picked up what registers as “light-moderate rain” on their radar. It was actually huge swarms of mayflies emanating from the Mississippi River.
National Weather Service/NOAA

This week, thick clouds of millions of mayflies emanated from the Mississippi River in Northeast Iowa.

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