Date: 09/04/2025

Number: 18

1912 Hours

18 monarchs, clustered together on Northeast side of a common hackberry (Celtis occidentalis), clustered together, 8 meters above the ground.

63 degrees F (17.22 C). No wind during observation but forecast at 6 mph from the southwest. RH 58%. Sun is setting so not much light.

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
Contact Observer

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