Migrating butterflies flood NWS radar signature in Denver - KOAA.com | Continuous News | Colorado Springs and Pueblo

Migrating butterflies flood NWS radar signature in Denver

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The National Weather Service in Boulder caught something on radar you don't see everyday. A massive butterfly migration spanning about 70 miles wide puzzled everyone on Tuesday.

They say the lacy, cloud-like pattern drifting across the Ddenver-area first looked like a flock of birds, but they ruled out any migrating fowl based on the northwest direction.

After putting out feelers on social media, people started reporting in about seeing a swarm of butterflies in the air over the metro area.

"Everyone thinks its monarchs flying through right now. But here at Phelan's we have yet to see a monarch on our property. They're all painted lady butteflies, which is about half the size, similiar coloration, but they look like dead leaves on the outside," explains Andrew Cronk of Phelan Gardens.

Midwestern radar stations occasionally pick up butterflies, but the National Weather Service in Boulder says they think it's a first for them.

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