Species · Washington · BBS 2025 Release · 1966–2024
Fox Sparrow Population Trend in Washington
Fox Sparrow in Washington has held roughly steady: up 10% on the route-weighted index since 1970.
+10%Since 1970
31Routes In State
54Years
Notable Fox Sparrow Trends in Washington
No notable trend signals for Fox Sparrow in Washington. See the full index history below.
Fox Sparrow Population Forecast in Washington
If the recent trend holds, Fox Sparrow in Washington is projected to fall about 48% by 2029 — from 0.26 in 2024 to a central estimate of 0.14 (95% range 0.00–0.29). A 5-year backtest shows a typical error of ±43.9%, with 100% of held-out values landing inside the 95% band.
-48%Change by 2029
0.14Projected 2029 index
0.00–0.2995% range
±43.9%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.14 | 0.00 | 0.29 |
| 2026 | 0.14 | 0.00 | 0.29 |
| 2027 | 0.14 | 0.00 | 0.29 |
| 2028 | 0.14 | 0.00 | 0.29 |
| 2029 | 0.14 | 0.00 | 0.29 |
Fox Sparrow Survey Routes in Washington
| Spring Lake | 5 | 2024 | 1982 |
| Mt Rainier | 5 | 2018 | 1992 |
| E. Mt. Adams | 4 | 2024 | 1995 |
| Cloverland | 4 | 2024 | 1993 |
| Nighthawk | 3 | 1992 | 1992 |
| Northport | 3 | 1997 | 1997 |
| Keller | 2 | 2006 | 1968 |
| Camas | 2 | 1977 | 1977 |
| Ronald | 2 | 2023 | 2013 |
| Mazama | 2 | 1994 | 1993 |
| Greenwater | 2 | 2023 | 2015 |
| Ozette | 1 | 2003 | 2003 |
| Port Angeles | 1 | 1974 | 1974 |
| Cascade Riv | 1 | 2003 | 2000 |
| L Pend O Nwr | 1 | 2017 | 2017 |
| Cougar | 1 | 1990 | 1990 |
| Rimrock | 1 | 2010 | 1982 |
| Asotin | 1 | 2001 | 2001 |
| Snowden | 1 | 2019 | 1982 |
| Sullivan Lake 2 | 1 | 2024 | 2006 |
| Glacier | 1 | 2024 | 1981 |
| Winthrop | 1 | 1989 | 1989 |
| Cusick | 1 | 2022 | 1993 |
| Packwood | 1 | 2001 | 1981 |
| Carlton | 1 | 2000 | 1998 |
Fox Sparrow Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.