Species · BCR 15 · BBS 2025 Release · 1966–2024
American Goldfinch In Sierra Nevada
American Goldfinch in Sierra Nevada has collapsed: down 97% on the route-weighted index since 1970.
-97%Since 1970
17Routes In Region
28Years
Notable Signals
long arc declinecomputed index
American Goldfinch has collapsed in Sierra Nevada: down 97% on the route-weighted index since 1970.
Forecast
If the recent trend holds, American Goldfinch in Sierra Nevada is projected to stay roughly flat through 2023, near 0.00 (95% range 0.00–0.58). A 5-year backtest shows a typical error of ±613.4%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2023
0.00Projected 2023 index
0.00–0.5895% range
±613.4%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2019 | 0.00 | 0.00 | 0.58 |
| 2020 | 0.00 | 0.00 | 0.58 |
| 2021 | 0.00 | 0.00 | 0.58 |
| 2022 | 0.00 | 0.00 | 0.58 |
| 2023 | 0.00 | 0.00 | 0.58 |
Routes In Sierra Nevada
| Greenhorn Mt | CALIFORNIA | 7 | 1980 |
| Sattley | CALIFORNIA | 3 | 1997 |
| Genesee | CALIFORNIA | 3 | 2008 |
| Hat Creek | CALIFORNIA | 3 | 1981 |
| Cottage Spgs | CALIFORNIA | 2 | 1971 |
| Lakeshore | CALIFORNIA | 2 | 1989 |
| Lassen Park | CALIFORNIA | 1 | 1977 |
| Dardanelle | CALIFORNIA | 1 | 1975 |
| Bass Lake | CALIFORNIA | 1 | 2018 |
| Woodfords | CALIFORNIA | 1 | 1981 |
| Kings Canyon | CALIFORNIA | 1 | 1990 |
| Higgins Corn | CALIFORNIA | 1 | 2012 |
| Downieville | CALIFORNIA | 1 | 1992 |
| Riverton | CALIFORNIA | 1 | 2017 |
| Paxton | CALIFORNIA | 1 | 2008 |
| Coulterville | CALIFORNIA | 1 | 1997 |
| Pine Mountain | CALIFORNIA | 1 | 2009 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.