Species · Oregon · BBS 2025 Release · 1966–2024
California Gull Population Trend in Oregon
California Gull in Oregon has surged: up 201% on the route-weighted index since 1971.
+201%Since 1971
27Routes In State
53Years
Notable California Gull Trends in Oregon
long arc increasecomputed index
California Gull has surged in Oregon: up 201% on the route-weighted index since 1971.
California Gull Population Forecast in Oregon
If the recent trend holds, California Gull in Oregon is projected to rise about 105% by 2028 — from 0.35 in 2023 to a central estimate of 0.72 (95% range 0.00–4.0). A 5-year backtest shows a typical error of ±1051.6%, with 100% of held-out values landing inside the 95% band.
+105%Change by 2028
0.72Projected 2028 index
0.00–4.095% range
±1051.6%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2024 | 0.75 | 0.00 | 4.0 |
| 2025 | 0.74 | 0.00 | 4.0 |
| 2026 | 0.74 | 0.00 | 4.0 |
| 2027 | 0.73 | 0.00 | 4.0 |
| 2028 | 0.72 | 0.00 | 4.0 |
California Gull Survey Routes in Oregon
| Merrill | 250 | 2022 | 2003 |
| Umatilla | 29 | 2023 | 1996 |
| Princeton | 25 | 1985 | 1972 |
| Crane | 14 | 1998 | 1995 |
| Ordnance | 13 | 1979 | 1972 |
| Bridgeport | 5 | 1988 | 1988 |
| Barnes Val | 4 | 1974 | 1973 |
| Harney Lake | 4 | 2006 | 1993 |
| Wedderburn | 3 | 1996 | 1970 |
| Sparta | 3 | 2001 | 1971 |
| Clover Creek | 3 | 1997 | 1997 |
| Alvord Lake | 2 | 2000 | 1988 |
| Joseph | 2 | 1991 | 1991 |
| Flook Lake | 2 | 2011 | 1998 |
| Tualatin | 1 | 1977 | 1971 |
| Lapham Res. | 1 | 1994 | 1994 |
| Dell Spring | 1 | 1970 | 1970 |
| Fandango Can | 1 | 1998 | 1984 |
| Malheur Nwr | 1 | 1991 | 1986 |
| Modoc Point | 1 | 2014 | 1969 |
| Adair | 1 | 1997 | 1989 |
| Mt Hood | 1 | 1995 | 1995 |
| Pendleton | 1 | 1984 | 1984 |
| Hazel Camp | 1 | 2009 | 1996 |
| Fish Lake | 1 | 2021 | 1977 |
California Gull Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.