Beer-loving Bugs Swarm in Midwest

July 28, 2014 12:57 PM

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Beer-loving Bugs Swarm in Midwest

Mayflies have begun emerging from the Mississippi River in swarms that show up on radar like thunderstorms, coat roads and leave behind slimy messes. They've already been blamed for at least one car crash this week in Wisconsin.

The flies hatch and then spend a year burrowed into the sediment on the bottom of the river that serves as a border between Wisconsin and Minnesota. They emerge the next summer to mate, lay eggs and die, all in less than 48 hours.

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