Species · North Dakota · BBS 2025 Release · 1966–2024
California Gull Population Trend in North Dakota
California Gull in North Dakota has risen sharply: up 59% on the route-weighted index since 1976.
+59%Since 1976
21Routes In State
49Years
Notable California Gull Trends in North Dakota
long arc increasecomputed index
California Gull has risen sharply in North Dakota: up 59% on the route-weighted index since 1976.
California Gull Population Forecast in North Dakota
If the recent trend holds, California Gull in North Dakota is projected to stay roughly flat through 2029, near 0.40 (95% range 0.00–1.2). A 5-year backtest shows a typical error of ±225.3%, with 100% of held-out values landing inside the 95% band.
+8%Change by 2029
0.40Projected 2029 index
0.00–1.295% range
±225.3%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.39 | 0.00 | 1.2 |
| 2026 | 0.39 | 0.00 | 1.2 |
| 2027 | 0.39 | 0.00 | 1.2 |
| 2028 | 0.40 | 0.00 | 1.2 |
| 2029 | 0.40 | 0.00 | 1.2 |
California Gull Survey Routes in North Dakota
| Buchanan | 8 | 2018 | 1975 |
| Douglas Crk | 7 | 2024 | 1982 |
| Danzig | 6 | 2008 | 2008 |
| Tobacco | 5 | 2006 | 1988 |
| Braddock | 5 | 2008 | 1992 |
| Regan | 3 | 2006 | 1978 |
| Powers Lake | 3 | 2022 | 1995 |
| Horsehead Lk | 2 | 2024 | 1980 |
| Lakota 2 | 2 | 2010 | 2010 |
| Edgeley | 1 | 2015 | 2007 |
| Lake George | 1 | 2008 | 1974 |
| Lakota | 1 | 2005 | 1980 |
| Niles | 1 | 1998 | 1996 |
| Dunn Center | 1 | 2018 | 2011 |
| Stanley | 1 | 1999 | 1981 |
| Wild Rose | 1 | 2022 | 1982 |
| Parshall | 1 | 1999 | 1982 |
| Sheyenne Lk | 1 | 2023 | 1988 |
| Turtle Mtns | 1 | 1988 | 1988 |
| Montpelier | 1 | 2024 | 2005 |
| Danzig 2 | 1 | 2022 | 2021 |
California Gull Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.