Species · Idaho · BBS 2025 Release · 1966–2024
Orange-crowned Warbler Population Trend in Idaho
Orange-crowned Warbler in Idaho has surged: up 204% on the route-weighted index since 1973.
+204%Since 1973
36Routes In State
46Years
Notable Orange-crowned Warbler Trends in Idaho
long arc increasecomputed index
Orange-crowned Warbler has surged in Idaho: up 204% on the route-weighted index since 1973.
Orange-crowned Warbler Population Forecast in Idaho
If the recent trend holds, Orange-crowned Warbler in Idaho is projected to rise about 14% by 2029 — from 1.6 in 2024 to a central estimate of 1.8 (95% range 1.00–2.5). A 5-year backtest shows a typical error of ±13.6%, with 80% of held-out values landing inside the 95% band.
+14%Change by 2029
1.8Projected 2029 index
1.00–2.595% range
±13.6%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 1.7 | 0.90 | 2.5 |
| 2026 | 1.7 | 0.93 | 2.5 |
| 2027 | 1.7 | 0.95 | 2.5 |
| 2028 | 1.7 | 0.97 | 2.5 |
| 2029 | 1.8 | 1.00 | 2.5 |
Orange-crowned Warbler Survey Routes in Idaho
| Coolin | 19 | 2024 | 1986 |
| Rochat Divde | 16 | 2023 | 1993 |
| Magic Mtn | 16 | 2024 | 1990 |
| Golden | 6 | 1995 | 1993 |
| Mivoden | 5 | 2023 | 1977 |
| Naples | 3 | 2021 | 1972 |
| N Fork Cda R | 3 | 2019 | 1993 |
| Cobalt | 3 | 2013 | 1991 |
| Featherville | 3 | 2024 | 1991 |
| Gifford | 2 | 2017 | 1995 |
| Lolo Pass | 2 | 2019 | 1994 |
| Marble Creek | 2 | 2019 | 1990 |
| Daniels Res | 2 | 1990 | 1988 |
| Blackft Res | 1 | 1994 | 1987 |
| Avery | 1 | 2017 | 1991 |
| Grangeville | 1 | 2023 | 1987 |
| Baker | 1 | 2017 | 2003 |
| Challis | 1 | 2023 | 1993 |
| Leadore | 1 | 2018 | 2007 |
| Squirrel | 1 | 2022 | 1971 |
| Centerville | 1 | 2019 | 1986 |
| Triangle | 1 | 2007 | 2006 |
| Pocatello | 1 | 1991 | 1991 |
| Sawtooth City 2 | 1 | 2018 | 2018 |
| Joel | 1 | 2024 | 1990 |
Orange-crowned Warbler Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.