Species · California · BBS 2025 Release · 1966–2024
Common Gallinule Population Trend in California
Common Gallinule in California has collapsed: down 82% on the route-weighted index since 1971.
-82%Since 1971
30Routes In State
52Years
Notable Common Gallinule Trends in California
long arc declinecomputed index
Common Gallinule has collapsed in California: down 82% on the route-weighted index since 1971.
Common Gallinule Population Forecast in California
If the recent trend holds, Common Gallinule in California is projected to stay roughly flat through 2029, near 0.07 (95% range 0.00–0.21). A 5-year backtest shows a typical error of ±990%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2029
0.07Projected 2029 index
0.00–0.2195% range
±990%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.07 | 0.00 | 0.21 |
| 2026 | 0.07 | 0.00 | 0.21 |
| 2027 | 0.07 | 0.00 | 0.21 |
| 2028 | 0.07 | 0.00 | 0.21 |
| 2029 | 0.07 | 0.00 | 0.21 |
Common Gallinule Survey Routes in California
| Glenn | 12 | 2009 | 1971 |
| Gravesboro | 4 | 1971 | 1969 |
| Auburn | 3 | 1975 | 1975 |
| Bakersfield | 2 | 1970 | 1970 |
| Coyote | 2 | 1983 | 1976 |
| Oneals | 2 | 1979 | 1979 |
| Blythe | 2 | 1977 | 1977 |
| Alamo River | 2 | 1990 | 1979 |
| Pennington | 1 | 1988 | 1975 |
| Arvin | 1 | 2012 | 1973 |
| Collegeville | 1 | 1969 | 1969 |
| Brawley | 1 | 1999 | 1990 |
| Cordova | 1 | 1980 | 1980 |
| Gold Hill | 1 | 1999 | 1999 |
| Westley | 1 | 2015 | 1979 |
| Dorris | 1 | 2017 | 1998 |
| Tranquillity | 1 | 2003 | 1973 |
| Lockwood | 1 | 1983 | 1983 |
| Palo Verde | 1 | 2024 | 2003 |
| Hollister | 1 | 2007 | 2003 |
| Zamora | 1 | 2021 | 1981 |
| Bodega Bay | 1 | 2016 | 2002 |
| Ora Loma | 1 | 1973 | 1973 |
| Point Reyes | 1 | 2009 | 2006 |
| Orland | 1 | 2003 | 1983 |
Common Gallinule Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.