Public Sites
| State | County | Name |
|---|---|---|
| Iowa | Clayton | Merritt Forest State Preserve |
| Florida | Brevard | Merritt Island National Wildlife Refuge |
| Colorado | Pueblo | Mesa Junction |
| Ohio | Butler | Miami University Ecology Research Center |
| Iowa | Scott | Middle Park |
| Iowa | Madison | Middle River Park |
| Iowa | Jefferson | Middle Walnut Creek |
| Iowa | Woodbury | Midway County Park |
| Iowa | Cerro Gordo | Mike Zack Wildlife Area |
| Illinois | Rock Island | Milan |
| Iowa | Buchanan | Milbach Prairie |
| Iowa | Mills | Mile Hill Lake Park |
| Iowa | Allamakee | Mile Long Prairie |
| Iowa | Dickinson | Milford |
| Iowa | Dickinson | Milford Fen |
| Iowa | Cherokee | Mill Creek & Gray Creek |
| Iowa | O'Brien | Mill Creek @ 340th Street |
| Iowa | O'Brien | Mill Creek @ 350th Street |
| Iowa | O'Brien | Mill Creek @ 390th Street |
| Iowa | O'Brien | Mill Creek @ 390th Street 2 |
| Iowa | O'Brien | Mill Creek @ 400th Street |
| Iowa | O'Brien | Mill Creek @ 450th Street |
| Iowa | Cherokee | Mill Creek @ 450th Street |
| Iowa | Cherokee | Mill Creek @ 470th Street |
| Iowa | Cherokee | Mill Creek @ High Country Road |