Birding spots · Iowa
Best Birding Spots in Union County, Iowa
Green Valley State Park leads Union County's birding spots with 117 species reported, best in spring. 3 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 |
|---|---|---|---|---|---|
| Green Valley State Park | 117 | 44 | 87 | 43 | 33 |
| Summit Lake Wildlife Management Area | 79 | 0 | 60 | 43 | 2 |
| Twelve Mile Lake (Union) Wildlife Management Area | 73 | 21 | 49 | 15 | 41 |