Date: 09/21/2017

Number: 1

They started coming by around 11:00am and continued heavily for a couple hours. Amazing to see. I never even knew they did this. I've been here 20 years and never witnessed such a thing. Still a few strays floating by today.

Editor’s Note: We are receiving dozens of reports from the Midwest of large scale migration, but the butterflies are Painted Ladies, not monarchs.

Silver Cliff, CO

Latitude: 38.1 Longitude: -105.4

Observed by: Jill
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