Species · Oregon · BBS 2025 Release · 1966–2024
Oak Titmouse Population Trend in Oregon
Oak Titmouse in Oregon has fallen sharply: down 68% on the route-weighted index since 1971.
-68%Since 1971
10Routes In State
45Years
Notable Oak Titmouse Trends in Oregon
long arc declinecomputed index
Oak Titmouse has fallen sharply in Oregon: down 68% on the route-weighted index since 1971.
Oak Titmouse Population Forecast in Oregon
If the recent trend holds, Oak Titmouse in Oregon is projected to stay roughly flat through 2029, near 0.04 (95% range 0.00–0.19). A 5-year backtest shows a typical error of ±90.4%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2029
0.04Projected 2029 index
0.00–0.1995% range
±90.4%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.05 | 0.00 | 0.20 |
| 2026 | 0.05 | 0.00 | 0.20 |
| 2027 | 0.05 | 0.00 | 0.19 |
| 2028 | 0.05 | 0.00 | 0.19 |
| 2029 | 0.04 | 0.00 | 0.19 |
Oak Titmouse Survey Routes in Oregon
| Derby | 6 | 1993 | 1968 |
| Emigrant Lake 2 | 3 | 2024 | 2002 |
| Days Creek | 2 | 2014 | 1993 |
| Emigrant Lk | 2 | 2001 | 1972 |
| Ruch | 1 | 2002 | 2002 |
| Secret Val | 1 | 2007 | 1981 |
| Merrill | 1 | 1996 | 1996 |
| Selma | 1 | 1995 | 1995 |
| Prospect | 1 | 2014 | 1996 |
| Sams Valley | 1 | 2024 | 1993 |
Oak Titmouse Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.