Monarch Fall Roost

Date: 09/07/2021

Number: 300

On the morning of September 8, I visited the same wildflower field at the southwest corner of Sherk and Oak Streets that I visited yesterday morning and reported under Peak Migration for September 7. The Monarchs were still in the field. I observed roosting clusters on the flowers and stems of Queen Anne's Lace. Some were also resting on the Red Clover. This leads me to hypothesise that these Monarchs spent the night in this field. Overnight temperatures were quite warm with the coldest temperatures being 18C, the same temperature as at the time of observation, 8:45 AM. Moderate wind from the south west with sunny skies. There were just as many Monarchs resting/roosting as were nectaring. Perhaps they have had their fill and are just waiting for the wind to change. Again, I have photos but I am unable to figure out how to post them to this site. If you contact me I will forward them.

[Additional information contributed by observer, added by Journey North, 09/13/21]:

For the roosted monarchs in this report, using my binaculars, I counted them individually and rounded to the nearest 10 to account for the odd one I may have missed. Observations were over the course of roughly an hour.

Leamington, ON

Latitude: 42 Longitude: -82.6

Observed by: Laura
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