Mystery solved? Suspicious radar echoes were probably migrating Monarch butterflies

September 25, 2014 12:26 AM

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A Monarch butterfly gathers pollen from a flower at Dillingham Memorial Garden in Enid, Okla, Thursday, Sept. 11, 2014. The butterflies are on their annual migration from Canada and the northern United States to Mexico. (AP/Enid News & Eagle, Billy Hefton)

The weather was beautiful in St. Louis, Mo. on Friday morning: 70 degrees and clear blue sky. Which is why forecasters were surprised by what they were seeing on their radar screens, which they now think were migrating Monarch butterflies.

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