Species · North Carolina · BBS 2025 Release · 1966–2024
Great Black-backed Gull Population Trend in North Carolina
Great Black-backed Gull in North Carolina has collapsed: down 88% on the route-weighted index since 1982.
-88%Since 1982
5Routes In State
18Years
Notable Great Black-backed Gull Trends in North Carolina
long arc declinecomputed index
Great Black-backed Gull has collapsed in North Carolina: down 88% on the route-weighted index since 1982.
Great Black-backed Gull Population Forecast in North Carolina
If the recent trend holds, Great Black-backed Gull in North Carolina is projected to stay roughly flat through 2026, near 0.00 (95% range 0.00–0.10). A 5-year backtest shows a typical error of ±73.9%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2026
0.00Projected 2026 index
0.00–0.1095% range
±73.9%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2022 | 0.00 | 0.00 | 0.10 |
| 2023 | 0.00 | 0.00 | 0.10 |
| 2024 | 0.00 | 0.00 | 0.10 |
| 2025 | 0.00 | 0.00 | 0.10 |
| 2026 | 0.00 | 0.00 | 0.10 |
Great Black-backed Gull Survey Routes in North Carolina
| Mashoes | 4 | 1982 | 1973 |
| Merrimon | 1 | 2013 | 2000 |
| Newport | 1 | 2002 | 2002 |
| Milltail Cr | 1 | 2021 | 1992 |
| Grandy | 1 | 1974 | 1973 |
Great Black-backed Gull Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.