Species · BCR 32 · BBS 2025 Release · 1966–2024
LeConte's Thrasher In Coastal California
LeConte's Thrasher in Coastal California has collapsed: down 93% on the route-weighted index since 1970.
-93%Since 1970
6Routes In Region
22Years
Notable Signals
long arc declinecomputed index
LeConte's Thrasher has collapsed in Coastal California: down 93% on the route-weighted index since 1970.
Forecast
If the recent trend holds, LeConte's Thrasher in Coastal California is projected to stay roughly flat through 2029, near 0.00 (95% range 0.00–0.40). A 5-year backtest shows a typical error of ±1534.8%, with 60% of held-out values landing inside the 95% band.
n/aChange by 2029
0.00Projected 2029 index
0.00–0.4095% range
±1534.8%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.00 | 0.00 | 0.40 |
| 2026 | 0.00 | 0.00 | 0.40 |
| 2027 | 0.00 | 0.00 | 0.40 |
| 2028 | 0.00 | 0.00 | 0.40 |
| 2029 | 0.00 | 0.00 | 0.40 |
Routes In Coastal California
| Bakersfield | CALIFORNIA | 4 | 1973 |
| Maricopa | CALIFORNIA | 2 | 2024 |
| Carrizo Pln | CALIFORNIA | 2 | 1972 |
| Shafter | CALIFORNIA | 1 | 1989 |
| Arvin | CALIFORNIA | 1 | 1972 |
| Buena Vista | CALIFORNIA | 1 | 2017 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.