Species · Idaho · BBS 2025 Release · 1966–2024
Olive-sided Flycatcher Population Trend in Idaho
Olive-sided Flycatcher in Idaho has surged: up 76% on the route-weighted index since 1972.
+76%Since 1972
34Routes In State
53Years
Notable Olive-sided Flycatcher Trends in Idaho
long arc increasecomputed index
Olive-sided Flycatcher has surged in Idaho: up 76% on the route-weighted index since 1972.
Olive-sided Flycatcher Population Forecast in Idaho
If the recent trend holds, Olive-sided Flycatcher in Idaho is projected to rise about 93% by 2029 — from 0.52 in 2024 to a central estimate of 1.0 (95% range 0.38–1.6). A 5-year backtest shows a typical error of ±66.3%, with 100% of held-out values landing inside the 95% band.
+93%Change by 2029
1.0Projected 2029 index
0.38–1.695% range
±66.3%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.98 | 0.35 | 1.6 |
| 2026 | 0.98 | 0.35 | 1.6 |
| 2027 | 0.99 | 0.36 | 1.6 |
| 2028 | 1.00 | 0.37 | 1.6 |
| 2029 | 1.0 | 0.38 | 1.6 |
Olive-sided Flycatcher Survey Routes in Idaho
| Lolo Pass | 13 | 2019 | 1992 |
| Cape Horn | 11 | 2024 | 1986 |
| Burgdorf | 7 | 2016 | 1988 |
| Yellow Pine | 7 | 2016 | 1989 |
| Golden | 5 | 2016 | 1987 |
| Pierce | 5 | 2007 | 1990 |
| Marble Creek | 4 | 2023 | 1988 |
| Sawtooth Cty | 4 | 2014 | 1990 |
| Baldy Mountain | 3 | 2016 | 2013 |
| Cabarton | 3 | 2022 | 1985 |
| Mivoden | 2 | 2018 | 1977 |
| N Fork Cda R | 2 | 2019 | 1994 |
| Cascade | 2 | 1983 | 1983 |
| Rochat Divde | 2 | 2023 | 1993 |
| Squirrel | 2 | 2023 | 1971 |
| Featherville | 2 | 2011 | 1989 |
| Nezperce Nf | 2 | 1998 | 1992 |
| Naples | 1 | 2009 | 1972 |
| Avery | 1 | 2023 | 1979 |
| Gifford | 1 | 2005 | 2005 |
| Grangeville | 1 | 2022 | 1986 |
| Deep Creek | 1 | 1985 | 1985 |
| Challis | 1 | 2024 | 1989 |
| Centerville | 1 | 2013 | 1982 |
| Alturas | 1 | 1987 | 1968 |
Olive-sided Flycatcher Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.