Species · North Carolina · BBS 2025 Release · 1966–2024
Ring-billed Gull Population Trend in North Carolina
Ring-billed Gull in North Carolina has collapsed: down 79% on the route-weighted index since 1969.
-79%Since 1969
13Routes In State
29Years
Notable Ring-billed Gull Trends in North Carolina
long arc declinecomputed index
Ring-billed Gull has collapsed in North Carolina: down 79% on the route-weighted index since 1969.
Ring-billed Gull Population Forecast in North Carolina
If the recent trend holds, Ring-billed Gull in North Carolina is projected to stay roughly flat through 2029, near 0.01 (95% range 0.00–0.17). A 5-year backtest shows a typical error of ±105.4%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2029
0.01Projected 2029 index
0.00–0.1795% range
±105.4%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.02 | 0.00 | 0.18 |
| 2026 | 0.02 | 0.00 | 0.18 |
| 2027 | 0.02 | 0.00 | 0.17 |
| 2028 | 0.02 | 0.00 | 0.17 |
| 2029 | 0.01 | 0.00 | 0.17 |
Ring-billed Gull Survey Routes in North Carolina
| Mattamuskeet | 26 | 2001 | 1999 |
| Cayton | 3 | 2022 | 2022 |
| Shallotte | 1 | 1990 | 1990 |
| Merrimon | 1 | 2013 | 1973 |
| Myrtle Grove | 1 | 2024 | 1966 |
| Supply | 1 | 1997 | 1997 |
| Arapahoe | 1 | 1992 | 1992 |
| Newport | 1 | 2008 | 2000 |
| Mooresville | 1 | 1968 | 1968 |
| California | 1 | 1977 | 1977 |
| Arcola | 1 | 2014 | 1971 |
| Flay | 1 | 1997 | 1997 |
| Ernul | 1 | 2007 | 2007 |
Ring-billed Gull Population Trend in Other States
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Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.