Species · California · BBS 2025 Release · 1966–2024
Red-shouldered Hawk Population Trend in California
Red-shouldered Hawk in California has surged: up 521% on the route-weighted index since 1970.
+521%Since 1970
129Routes In State
56Years
Notable Red-shouldered Hawk Trends in California
long arc increasecomputed index
Red-shouldered Hawk has surged in California: up 521% on the route-weighted index since 1970.
Red-shouldered Hawk Population Forecast in California
If the recent trend holds, Red-shouldered Hawk in California is projected to stay roughly flat through 2029, near 0.86 (95% range 0.62–1.1). A 5-year backtest shows a typical error of ±23.7%, with 80% of held-out values landing inside the 95% band.
+5%Change by 2029
0.86Projected 2029 index
0.62–1.195% range
±23.7%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.81 | 0.57 | 1.0 |
| 2026 | 0.82 | 0.59 | 1.1 |
| 2027 | 0.83 | 0.60 | 1.1 |
| 2028 | 0.85 | 0.61 | 1.1 |
| 2029 | 0.86 | 0.62 | 1.1 |
Red-shouldered Hawk Survey Routes in California
| Fairfax | 15 | 2024 | 1978 |
| Coyote | 12 | 2024 | 1995 |
| Bass Lake | 5 | 2019 | 2007 |
| San Ysidro | 5 | 2019 | 1977 |
| Silver City | 5 | 2013 | 1978 |
| Gold Hill | 5 | 2023 | 1995 |
| Alderpoint | 5 | 2012 | 1975 |
| Harbor Lake 2 | 5 | 2024 | 2014 |
| Pennington | 4 | 2022 | 1984 |
| Lake Success | 4 | 1996 | 1980 |
| Navarro | 4 | 2011 | 1972 |
| Moraga | 4 | 2024 | 1974 |
| Tres Pinos 2 | 4 | 2011 | 2005 |
| Collegeville 2 | 4 | 2014 | 2009 |
| Jofegan 2 | 3 | 2024 | 2024 |
| Calpella | 3 | 1986 | 1973 |
| Orange Cove | 3 | 2016 | 1976 |
| Morro Bay | 3 | 2019 | 1974 |
| Sawmill Mtn | 3 | 2013 | 1973 |
| El Toro | 3 | 1999 | 1973 |
| Elsinore Mtn | 3 | 2024 | 1971 |
| Elizabeth Lk | 3 | 2016 | 1976 |
| Laytonville | 3 | 2024 | 1973 |
| Mark West | 3 | 2024 | 1973 |
| Zamora | 3 | 2024 | 1974 |
Red-shouldered Hawk Population Trend in Other States
alabamaarkansasconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourinebraskanew-hampshirenew-jerseynew-yorknorth-carolinaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinatennesseetexasvermontvirginiawashingtonwest-virginiawisconsin
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.