4/4: Migrating butterflies in high quantities explains it. Today, the butterflies are staying close to the ground. #cowx #Science pic.twitter.com/rkpwmPRnsi
— NWS Boulder (@NWSBoulder) October 4, 2017
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4/4: Migrating butterflies in high quantities explains it. Today, the butterflies are staying close to the ground. #cowx #Science pic.twitter.com/rkpwmPRnsi
— NWS Boulder (@NWSBoulder) October 4, 2017