Species · Idaho · BBS 2025 Release · 1966–2024
Bald Eagle Population Trend in Idaho
Bald Eagle in Idaho has held roughly steady: up 8% on the route-weighted index since 1984.
+8%Since 1984
26Routes In State
36Years
Notable Bald Eagle Trends in Idaho
No notable trend signals for Bald Eagle in Idaho. See the full index history below.
Bald Eagle Population Forecast in Idaho
If the recent trend holds, Bald Eagle in Idaho is projected to fall about 37% by 2029 — from 0.36 in 2024 to a central estimate of 0.23 (95% range 0.00–0.45). A 5-year backtest shows a typical error of ±49.7%, with 60% of held-out values landing inside the 95% band.
-37%Change by 2029
0.23Projected 2029 index
0.00–0.4595% range
±49.7%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.21 | 0.00 | 0.44 |
| 2026 | 0.22 | 0.00 | 0.44 |
| 2027 | 0.22 | 0.00 | 0.44 |
| 2028 | 0.22 | 0.00 | 0.45 |
| 2029 | 0.23 | 0.00 | 0.45 |
Bald Eagle Survey Routes in Idaho
| Cascade | 8 | 1984 | 1983 |
| Bates | 4 | 2019 | 1998 |
| Baker | 3 | 2022 | 2008 |
| Leadore | 3 | 2024 | 2007 |
| Naples | 2 | 2024 | 1988 |
| Lost River | 2 | 2008 | 2008 |
| Iron Springs | 2 | 2024 | 2011 |
| Picabo | 2 | 2009 | 2009 |
| Mivoden | 1 | 2017 | 2014 |
| Gifford | 1 | 2016 | 2015 |
| Nezperce | 1 | 2012 | 2012 |
| Lolo Pass | 1 | 2006 | 2006 |
| Circular Bu | 1 | 2007 | 2007 |
| Cape Horn | 1 | 2016 | 2012 |
| N Fork Cda R | 1 | 2018 | 2003 |
| Blacks Creek | 1 | 1974 | 1974 |
| Centerville | 1 | 2010 | 2010 |
| Springfield | 1 | 1996 | 1992 |
| Ririe | 1 | 2021 | 1999 |
| Coolin | 1 | 2004 | 2004 |
| Sawtooth City 2 | 1 | 2024 | 2016 |
| Featherville | 1 | 2024 | 1990 |
| Mud Lake | 1 | 2023 | 2023 |
| Cedar Hill | 1 | 2014 | 2014 |
| Daniels Res | 1 | 2013 | 2013 |
Bald Eagle Population Trend in Other States
alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniasouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.