Species · BCR 5 · BBS 2025 Release · 1966–2024
California Thrasher In Northern Pacific Rainforest
California Thrasher in Northern Pacific Rainforest has collapsed: down 90% on the route-weighted index since 1971.
-90%Since 1971
9Routes In Region
45Years
Notable Signals
long arc declinecomputed index
California Thrasher has collapsed in Northern Pacific Rainforest: down 90% on the route-weighted index since 1971.
Forecast
If the recent trend holds, California Thrasher in Northern Pacific Rainforest is projected to stay roughly flat through 2028, near 0.00 (95% range 0.00–0.12). A 5-year backtest shows a typical error of ±461.8%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2028
0.00Projected 2028 index
0.00–0.1295% range
±461.8%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2024 | 0.00 | 0.00 | 0.12 |
| 2025 | 0.00 | 0.00 | 0.12 |
| 2026 | 0.00 | 0.00 | 0.12 |
| 2027 | 0.00 | 0.00 | 0.12 |
| 2028 | 0.00 | 0.00 | 0.12 |
Routes In Northern Pacific Rainforest
| Fish Rock | CALIFORNIA | 4 | 2007 |
| Hullville | CALIFORNIA | 2 | 2019 |
| French Gulch | CALIFORNIA | 2 | 2005 |
| Shasta Lake | CALIFORNIA | 1 | 1988 |
| Navarro | CALIFORNIA | 1 | 1974 |
| Longvale | CALIFORNIA | 1 | 2023 |
| Mt Shasta | CALIFORNIA | 1 | 2013 |
| Laytonville | CALIFORNIA | 1 | 1982 |
| Burnt Ranch | CALIFORNIA | 1 | 2013 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.