Species · BCR 32 · BBS 2025 Release · 1966–2024
Common Yellowthroat In Coastal California
Common Yellowthroat in Coastal California has surged: up 20× on the route-weighted index since 1970.
20×Since 1970
67Routes In Region
55Years
Notable Signals
long arc increasecomputed index
Common Yellowthroat has surged in Coastal California: up 20× on the route-weighted index since 1970.
Forecast
If the recent trend holds, Common Yellowthroat in Coastal California is projected to fall about 35% by 2029 — from 1.9 in 2024 to a central estimate of 1.2 (95% range 0.36–2.1). A 5-year backtest shows a typical error of ±30.8%, with 100% of held-out values landing inside the 95% band.
-35%Change by 2029
1.2Projected 2029 index
0.36–2.195% range
±30.8%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 1.2 | 0.31 | 2.0 |
| 2026 | 1.2 | 0.32 | 2.0 |
| 2027 | 1.2 | 0.34 | 2.1 |
| 2028 | 1.2 | 0.35 | 2.1 |
| 2029 | 1.2 | 0.36 | 2.1 |
Routes In Coastal California
| Jofegan 2 | CALIFORNIA | 27 | 2024 |
| Ora Loma | CALIFORNIA | 17 | 2024 |
| Cp. Pendleton | CALIFORNIA | 15 | 2004 |
| Staten Is. | CALIFORNIA | 9 | 2024 |
| Poway | CALIFORNIA | 7 | 1980 |
| South Lake | CALIFORNIA | 7 | 2006 |
| Moreno | CALIFORNIA | 6 | 2024 |
| Jofegan | CALIFORNIA | 6 | 2023 |
| Harbor Lake 2 | CALIFORNIA | 6 | 2024 |
| Foster Park | CALIFORNIA | 5 | 1994 |
| San Ysidro | CALIFORNIA | 5 | 2019 |
| Point Reyes | CALIFORNIA | 5 | 2023 |
| Athlone | CALIFORNIA | 5 | 1979 |
| Fairfax | CALIFORNIA | 3 | 2024 |
| El Toro | CALIFORNIA | 3 | 1999 |
| Cuyamaca Pk | CALIFORNIA | 3 | 2024 |
| Elizabeth Lk | CALIFORNIA | 3 | 2016 |
| Glenn | CALIFORNIA | 3 | 2022 |
| Greenfield | CALIFORNIA | 3 | 2024 |
| Lake Hemet 2 | CALIFORNIA | 3 | 2018 |
| Anza 2 | CALIFORNIA | 3 | 2024 |
| Hollister | CALIFORNIA | 2 | 2007 |
| Morro Bay | CALIFORNIA | 2 | 2019 |
| Orland | CALIFORNIA | 2 | 2019 |
| Mesa Grande | CALIFORNIA | 2 | 2024 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.