Birding spots · Illinois
Best Birding Spots in St. Clair County, Illinois
Cahokia Mounds State Historical Site leads St. Clair County's birding spots with 159 species reported, best in spring. 10 spots in the county have enough data to rank.
Species counts are birds reported at least three times in that season at that spot, 2016–2025. Busy spots list more species simply because more people look, so compare the checklist counts. Spot names come from public map data and hotspot listings.
| Spot | Species | Winter | Spring | Summer | Fall |
|---|---|---|---|---|---|
| Cahokia Mounds State Historical Site | 159 | 51 | 126 | 93 | 78 |
| Rock Springs Nature Park | 131 | 35 | 118 | 64 | 74 |
| Peabody River King State Fish and Wildlife Area | 131 | 49 | 81 | 63 | 69 |
| Baldwin Lake | 126 | 73 | 93 | 33 | 45 |
| Centennial Park (Wolf Branch) | 117 | 47 | 101 | 53 | 55 |
| Frank Holten State Park | 115 | 37 | 95 | 35 | 44 |
| Birding spot near Rentchler | 129 | 40 | 97 | 57 | 68 |
| Birding spot near Swansea | 103 | 33 | 86 | 51 | 54 |
| Birding spot near Brooklyn | 98 | 0 | 71 | 90 | 0 |
| Birding spot near Lebanon | 93 | 50 | 65 | 1 | 64 |