Date: 09/02/2025

Number: 30

1915 - 1919 Hours

Monarch clusters in common hackberry (Celtis occidentalis) on side of trail.
Total = 30

1st cluster of 7 monarchs on the south side of tree, 6 meters above ground level.
2nd cluster of 4 monarchs on the south side of the tree, 8 meters above ground level.
3rd cluster of 5 monarchs on northeast of tree, 6 meters above ground level.
4th cluster of 11 monarchs on the northeast side of tree, 9 meters above ground level.
3 additional monarchs arrived and landed at 4th cluster.

72 degrees Fahrenheit (22.22 C). RH 58%. No wind.

Adjacent to Henslow Trail, near Iron Bridge Trailhead, Iron Bridge Prairie Restoration, Midewin National Tallgrass Prairie (U.S. Forest Service).

Wilmington, IL

Latitude: 41.4 Longitude: -88.1

Observed by: Mike
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