Species · Idaho · BBS 2025 Release · 1966–2024
American Wigeon Population Trend in Idaho
American Wigeon in Idaho has edged down: down 18% on the route-weighted index since 1977.
-18%Since 1977
25Routes In State
48Years
Notable American Wigeon Trends in Idaho
No notable trend signals for American Wigeon in Idaho. See the full index history below.
American Wigeon Population Forecast in Idaho
If the recent trend holds, American Wigeon in Idaho is projected to fall about 46% by 2029 — from 0.60 in 2024 to a central estimate of 0.32 (95% range 0.00–1.1). A 5-year backtest shows a typical error of ±68.5%, with 80% of held-out values landing inside the 95% band.
-46%Change by 2029
0.32Projected 2029 index
0.00–1.195% range
±68.5%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.33 | 0.00 | 1.1 |
| 2026 | 0.33 | 0.00 | 1.1 |
| 2027 | 0.33 | 0.00 | 1.1 |
| 2028 | 0.33 | 0.00 | 1.1 |
| 2029 | 0.32 | 0.00 | 1.1 |
American Wigeon Survey Routes in Idaho
| Iron Springs | 8 | 2024 | 1988 |
| Naples | 7 | 2024 | 1988 |
| Crane Creek | 6 | 2002 | 1995 |
| Craters | 5 | 1987 | 1987 |
| Salmon River | 5 | 1998 | 1998 |
| Blackft Res | 2 | 2018 | 1984 |
| Mivoden | 2 | 1980 | 1980 |
| Kyle Canyon | 2 | 1997 | 1997 |
| Cascade | 2 | 1984 | 1978 |
| Cape Horn | 2 | 1997 | 1993 |
| Henry | 2 | 1981 | 1975 |
| Picabo | 2 | 2015 | 1991 |
| Mud Lake | 2 | 2007 | 1992 |
| Bates | 2 | 2022 | 1990 |
| Preston | 2 | 2023 | 2023 |
| Cabarton | 2 | 2023 | 1985 |
| Sawtooth Cty | 2 | 2005 | 2004 |
| Pasadena Val | 2 | 1992 | 1990 |
| Challis | 1 | 1976 | 1976 |
| Blacks Creek | 1 | 1981 | 1981 |
| Centerville | 1 | 1997 | 1997 |
| Springfield | 1 | 1986 | 1986 |
| Featherville | 1 | 2023 | 2023 |
| Dougal Res | 1 | 1998 | 1998 |
| Daniels Res | 1 | 1991 | 1991 |
American Wigeon Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.