BirdAnalyst
Species · Maine · BBS 2025 Release · 1966–2024

Ring-billed Gull Population Trend in Maine

All statesWetland birds

Ring-billed Gull in Maine has risen sharply: up 73% on the route-weighted index since 1987.

+73%Since 1987
22Routes In State
38Years

Notable Ring-billed Gull Trends in Maine

long arc increasecomputed index

Ring-billed Gull has risen sharply in Maine: up 73% on the route-weighted index since 1987.

Ring-billed Gull Population Forecast in Maine

If the recent trend holds, Ring-billed Gull in Maine is projected to rise about 12× by 2029 — from 0.05 in 2024 to a central estimate of 0.61 (95% range 0.00–1.6). A 5-year backtest shows a typical error of ±204.5%, with 100% of held-out values landing inside the 95% band.

12×Change by 2029
0.61Projected 2029 index
0.00–1.695% range
±204.5%Backtest error
19852029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected index95% low95% high
20250.610.001.6
20260.610.001.6
20270.610.001.6
20280.610.001.6
20290.610.001.6

Ring-billed Gull Survey Routes in Maine

Routes recording Ring-billed Gull in Maine.
Newcastle1020231985
Harmony1020152004
Carrabassett920232023
Greenville820221994
Deblois620071999
St David420052004
Otisfield Gr320112005
Seboomook Lk320121997
Wilson Mills220231991
Greenwood220142014
Brooks220172017
Moose River220072000
Washburn220042004
Boundary220152015
Westbrook120071987
Kittery Pt120241993
Turner119881988
East Troy120172017
Baker Lake 2120132013
Cambridge119981998
Medway120181998
Horse Mtn120082008

Ring-billed Gull Population Trend in Other States

alabamaarizonacaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamarylandmassachusettsmichiganminnesotamissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.