Species · Iowa · BBS 2025 Release · 1966–2024
American Coot Population Trend in Iowa
American Coot in Iowa has collapsed: down 77% on the route-weighted index since 1972.
-77%Since 1972
11Routes In State
27Years
Notable American Coot Trends in Iowa
long arc declinecomputed index
American Coot has collapsed in Iowa: down 77% on the route-weighted index since 1972.
American Coot Population Forecast in Iowa
If the recent trend holds, American Coot in Iowa is projected to stay roughly flat through 2027, near 0.01 (95% range 0.00–0.43). A 5-year backtest shows a typical error of ±104.1%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2027
0.01Projected 2027 index
0.00–0.4395% range
±104.1%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2023 | 0.03 | 0.00 | 0.45 |
| 2024 | 0.02 | 0.00 | 0.44 |
| 2025 | 0.02 | 0.00 | 0.44 |
| 2026 | 0.02 | 0.00 | 0.44 |
| 2027 | 0.01 | 0.00 | 0.43 |
American Coot Survey Routes in Iowa
| Pierson | 4 | 2009 | 1976 |
| Titonka | 3 | 1991 | 1980 |
| Bedford | 2 | 1979 | 1979 |
| Scranton | 2 | 1993 | 1973 |
| Rock Valley | 1 | 1972 | 1972 |
| Washington | 1 | 2022 | 1990 |
| Kanawha | 1 | 2019 | 2018 |
| Zearing | 1 | 1990 | 1990 |
| Sioux City | 1 | 2017 | 1969 |
| Festina | 1 | 2010 | 1971 |
| Garner | 1 | 1984 | 1984 |
American Coot Population Trend in Other States
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Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.