Species · Idaho · BBS 2025 Release · 1966–2024
Cassin's Finch Population Trend in Idaho
Cassin's Finch in Idaho has surged: up 507% on the route-weighted index since 1972.
+507%Since 1972
44Routes In State
54Years
Notable Cassin's Finch Trends in Idaho
long arc increasecomputed index
Cassin's Finch has surged in Idaho: up 507% on the route-weighted index since 1972.
Cassin's Finch Population Forecast in Idaho
If the recent trend holds, Cassin's Finch in Idaho is projected to rise about 120% by 2029 — from 1.5 in 2024 to a central estimate of 3.3 (95% range 1.3–5.2). A 5-year backtest shows a typical error of ±130.6%, with 20% of held-out values landing inside the 95% band.
+120%Change by 2029
3.3Projected 2029 index
1.3–5.295% range
±130.6%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 3.1 | 1.1 | 5.1 |
| 2026 | 3.1 | 1.2 | 5.1 |
| 2027 | 3.2 | 1.2 | 5.1 |
| 2028 | 3.2 | 1.3 | 5.2 |
| 2029 | 3.3 | 1.3 | 5.2 |
Cassin's Finch Survey Routes in Idaho
| Silver City | 17 | 2024 | 1989 |
| Yellow Pine | 13 | 2016 | 1989 |
| Centerville | 11 | 2019 | 1972 |
| Cascade | 8 | 1984 | 1974 |
| Cape Horn | 8 | 2024 | 1987 |
| Burgdorf | 8 | 2016 | 1988 |
| Almo | 7 | 2023 | 1988 |
| Deep Creek | 6 | 1985 | 1985 |
| Bates | 6 | 2013 | 1992 |
| Rochat Divde | 5 | 2023 | 1994 |
| Sunbeam | 5 | 2019 | 1994 |
| Picabo | 5 | 2003 | 1997 |
| Nezperce Nf | 5 | 1992 | 1992 |
| Avery | 4 | 2023 | 1979 |
| Alturas | 4 | 1987 | 1968 |
| Dougal Res | 4 | 2019 | 1990 |
| Cabarton | 4 | 2023 | 1985 |
| Challis | 3 | 2024 | 1978 |
| Leadore | 3 | 2019 | 1979 |
| Sawtooth Cty | 3 | 2014 | 1989 |
| Mivoden | 2 | 2007 | 1978 |
| Gifford | 2 | 2010 | 1986 |
| Grangeville | 2 | 2022 | 1986 |
| Golden | 2 | 2007 | 1987 |
| N Fork Cda R | 2 | 2001 | 2001 |
Cassin's Finch Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.