Species · Massachusetts · BBS 2025 Release · 1966–2024
Ring-billed Gull Population Trend in Massachusetts
Ring-billed Gull in Massachusetts has collapsed: down 85% on the route-weighted index since 1972.
-85%Since 1972
10Routes In State
21Years
Notable Ring-billed Gull Trends in Massachusetts
long arc declinecomputed index
Ring-billed Gull has collapsed in Massachusetts: down 85% on the route-weighted index since 1972.
Ring-billed Gull Population Forecast in Massachusetts
If the recent trend holds, Ring-billed Gull in Massachusetts is projected to stay roughly flat through 2024, near 0.00 (95% range 0.00–0.64). A 5-year backtest shows a typical error of ±621.7%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2024
0.00Projected 2024 index
0.00–0.6495% range
±621.7%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2020 | 0.00 | 0.00 | 0.64 |
| 2021 | 0.00 | 0.00 | 0.64 |
| 2022 | 0.00 | 0.00 | 0.64 |
| 2023 | 0.00 | 0.00 | 0.64 |
| 2024 | 0.00 | 0.00 | 0.64 |
Ring-billed Gull Survey Routes in Massachusetts
| N Oxford | 3 | 2011 | 1995 |
| Marion | 1 | 2011 | 1972 |
| Wellfleet | 1 | 2005 | 2005 |
| Prattville | 1 | 2002 | 2002 |
| Newburyport | 1 | 1995 | 1968 |
| Wellfleet 2 | 1 | 2016 | 2016 |
| Littleton | 1 | 1996 | 1996 |
| Mansfield | 1 | 2009 | 2007 |
| N. Andover | 1 | 2019 | 1995 |
| Pittsfield | 1 | 1997 | 1997 |
Ring-billed Gull Population Trend in Other States
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Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.