Strange Weather Anomaly? Nope. Just Painted Ladies.

Strange Weather Anomaly? Nope. Just Painted Ladies.

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The National Weather Service in Boulder could see it coming on their radar, but weren’t sure what “it” was.

A massive swarm of migrating butterflies, known as Painted Ladies had meteorologists scratching their heads. The mysterious red and purple blobs began appearing on radar screens, stretching at least 100 miles across the Denver area.

“The radar started to light up right after sunrise and that whole mass just started to move over Denver, all flying in the same direction, kind of floating with the light winds that day,” Paul Schlatter, a meteorologist with the National Weather Service in Boulder, told ABC News.

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The orange-and-black butterflies were passing through Colorado on their annual migration south before the winter months.

The flock of butterflies appeared to be at least 100 miles wide, noting that radar may not have picked up the entire mass migration because its signal eventually drops off due to the curvature of the earth.

Original report here.

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