Date: 09/29/2010

Number: 300

I have home in San Miguel Allende, Mexico and saw early this morning (September 30th) several hundred
monarchs on our deciduous fir tree. My neighbours 1 mile away said they had a roost 5 years ago. No photo was taken; the butterflies left the next morning.

Editor's Note: Sighting is dated September 29th because, for consistency, roosts are dated according to the assumed evening first formed. The species roosting could possibly have been Queens. We know Queens also form roosts during fall migration and this roost was so far south of all other monarch roosts that had been reported to date. At the time of this sighting, the nearest confirmed monarch roosts were in Oklahoma. We are estimating 300 monarchs based on observer’s estimate of “several hundred.”

San Miguel de Allende, GUA

Latitude: 20.9 Longitude: -100.7

Observed by:
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