Species · Oregon · BBS 2025 Release · 1966–2024
American Dipper Population Trend in Oregon
American Dipper in Oregon has edged down: down 21% on the route-weighted index since 1972.
-21%Since 1972
39Routes In State
47Years
Notable American Dipper Trends in Oregon
No notable trend signals for American Dipper in Oregon. See the full index history below.
American Dipper Population Forecast in Oregon
If the recent trend holds, American Dipper in Oregon is projected to fall about 56% by 2029 — from 0.13 in 2024 to a central estimate of 0.06 (95% range 0.00–0.12). A 5-year backtest shows a typical error of ±72.6%, with 80% of held-out values landing inside the 95% band.
-56%Change by 2029
0.06Projected 2029 index
0.00–0.1295% range
±72.6%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.06 | 0.00 | 0.12 |
| 2026 | 0.06 | 0.00 | 0.12 |
| 2027 | 0.06 | 0.00 | 0.12 |
| 2028 | 0.06 | 0.00 | 0.12 |
| 2029 | 0.06 | 0.00 | 0.12 |
American Dipper Survey Routes in Oregon
| Molalla | 9 | 2024 | 1996 |
| Svensen | 3 | 1992 | 1992 |
| Timber | 2 | 2017 | 1993 |
| Riley Peak | 2 | 2016 | 1995 |
| Scio | 2 | 2002 | 1998 |
| Camp Sherman | 2 | 1994 | 1972 |
| Blue River | 2 | 2022 | 1992 |
| Sandy River | 1 | 1995 | 1993 |
| Santiam | 1 | 2018 | 1999 |
| Imnaha | 1 | 1993 | 1972 |
| Salado | 1 | 2017 | 2017 |
| Cool Camp | 1 | 2003 | 1969 |
| Logdell | 1 | 1988 | 1987 |
| Wickiup | 1 | 2024 | 1988 |
| Bridgeport | 1 | 1995 | 1995 |
| Winberry | 1 | 2002 | 1969 |
| Wizard Falls | 1 | 2016 | 2016 |
| Derby | 1 | 1970 | 1970 |
| Paisley | 1 | 2021 | 2008 |
| Bly 2 | 1 | 2008 | 2008 |
| Mt Hood | 1 | 2015 | 1974 |
| Granite | 1 | 1989 | 1989 |
| Elkton | 1 | 1972 | 1972 |
| Clearwater | 1 | 2006 | 1992 |
| Elk Lake | 1 | 1991 | 1978 |
American Dipper Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.