Date: 08/30/2025

Number: 5

1906 Hours
2 monarchs roosting in in common hackberry (Celtis occidentalis), approximately 3 meters above ground level on side of tree facing southwest.

Wind from northeast at 5 mph. 69 degrees Fahrenheit (20.56 Celsius). RH 70%. Sunset scheduled for 1928 hours.

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

41.37445 N, -88.12513 W

1916 Hours
5 total monarchs in common hackberry (Celtis occidentalis). 2 monarchs roosting togeger on one branch on the west side of tree (second monarch flew up and joined first monarch as we observed), 1 in a separate branch on west side. 1 monarch on the southwest side of tree. 1 monarch on the south side of tree. All monarchs are approximately 7 – 8 meters above ground. Monarch activity still observed with monarchs exploring trees, with tendency to fly to west / southwest exploring trees.

Wind from east-northeast at 5 mph. 68 degrees Fahrenheit (20 Celsius). RH 71%. Sunset scheduled for 1928 hours.

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

Wilmington, IL

Latitude: 41.4 Longitude: -88.1

Observed by: Mike
Contact Observer

The observer's e-mail address will not be disclosed.
Contact will be made through a web-based form.