Species · South Dakota · BBS 2025 Release · 1966–2024
American Coot Population Trend in South Dakota
American Coot in South Dakota has fallen sharply: down 71% on the route-weighted index since 1969.
-71%Since 1969
46Routes In State
57Years
Notable American Coot Trends in South Dakota
long arc declinecomputed index
American Coot has fallen sharply in South Dakota: down 71% on the route-weighted index since 1969.
American Coot Population Forecast in South Dakota
If the recent trend holds, American Coot in South Dakota is projected to fall about 48% by 2029 — from 2.0 in 2024 to a central estimate of 1.0 (95% range 0.00–5.9). A 5-year backtest shows a typical error of ±47.9%, with 100% of held-out values landing inside the 95% band.
-48%Change by 2029
1.0Projected 2029 index
0.00–5.995% range
±47.9%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 1.3 | 0.00 | 6.1 |
| 2026 | 1.2 | 0.00 | 6.0 |
| 2027 | 1.1 | 0.00 | 6.0 |
| 2028 | 1.1 | 0.00 | 5.9 |
| 2029 | 1.0 | 0.00 | 5.9 |
American Coot Survey Routes in South Dakota
| White Lake | 35 | 2011 | 1967 |
| Long Lake | 26 | 2019 | 1967 |
| S. Pioneer | 25 | 2024 | 1994 |
| White River | 21 | 1998 | 1994 |
| Broadland | 19 | 2012 | 1970 |
| Isabel | 19 | 2015 | 2011 |
| Gettysburg | 17 | 2023 | 1969 |
| Badlands | 14 | 1997 | 1987 |
| French Creek | 12 | 2001 | 1997 |
| Forbes | 11 | 2024 | 1967 |
| Lane 2 | 7 | 2010 | 2007 |
| Raymond | 6 | 2021 | 1968 |
| Ardmore | 6 | 2019 | 1977 |
| Roswell | 5 | 2014 | 1967 |
| Crow Creek | 5 | 2019 | 2009 |
| Veblen | 5 | 2022 | 1967 |
| Gorman | 4 | 2007 | 1995 |
| Britton | 3 | 2023 | 1967 |
| Volunteer | 3 | 2019 | 1967 |
| Ottumwa | 3 | 2019 | 1967 |
| Howard | 2 | 2021 | 1983 |
| Cottonwood | 2 | 2024 | 1992 |
| Rockyford | 2 | 1974 | 1967 |
| Ft Thompson | 2 | 1993 | 1967 |
| Laplant | 2 | 1978 | 1971 |
American Coot Population Trend in Other States
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Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.