Monarch PEAK Migration

Date: 09/11/2020

Number: 1000

Beginning about 6:00 pm EDT and continuing until 7:30 pm EDT, monarch's were migrating over our Lake Michigan cottage. Many high above the trees, some along the sand dunes, some along the beach. Last year was good; this year even better numbers.

The Monarchs were flying south. The wind was gentle, from the west/southwest. The 1,000 count is a conservative number: I often counted more than 50 per 60 seconds, and the observation period was more than 90 minutes long.

The following day (September 12), between periods of rain and against a stronger wind out of the west/southwest, we observed a much smaller migration, again for about 90 minutes.

Shelby, MI

Latitude: 43.6 Longitude: -86.5

Observed by: John
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