BirdAnalyst
Species · Ohio · BBS 2026 Release · 1966–2025

Ring-billed Gull Population Trend in Ohio

All statesWetland birds

Ring-billed Gull in Ohio has declined: down 30% on the route-weighted index since 1969.

-30%Since 1969TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
25Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
56YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Ring-billed Gull Trends in OhioNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

No notable trend signals for Ring-billed Gull in Ohio. See the full index history below.

Ring-billed Gull Population Forecast in Ohio

If the recent trend holds, Ring-billed Gull in Ohio is projected to fall about 25% by 2030 — from 0.71 in 2025 to a central estimate of 0.53 (95% range 0.00–4.1). A 5-year backtest shows a typical error of ±1079.6%, with 100% of held-out values landing inside the 95% band.

-25%Change by 2030TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
0.53Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–4.195% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±1079.6%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, Ring-billed Gull in Ohio is projected to fall about 25% by 2030 — from 0.71 in 2025 to a central estimate of 0.53 (95% range 0.00–4.1). A 5-year backtest shows a typical error of ±1079.6%, with 100% of held-out values landing inside the 95% band.19662030
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
20260.630.004.2
20270.600.004.1
20280.580.004.1
20290.550.004.1
20300.530.004.1

Ring-billed Gull Survey Routes in Ohio

Routes recording Ring-billed Gull in Ohio.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →
Graytown19819841966
Limestone6820241986
Bismark6319951978
Vickery2320251996
Peru2019771969
Norwalk1220102003
Lenox420071992
Meadowbrook320162016
W Carrollton220142013
New Somerset219721972
Hiram220211993
Napoleon119961996
Bloomville120172017
Kingsway119941981
N Baltimore120151988
Pittsfield120171998
Ashley120161993
Wayland120171996
Middlefield120121971
Herner Crns120241974
Botkins119981992
Kalida119931993
Kenton120131981
Hebron120141999
Valley City120252006

Ring-billed Gull Population Trend in Other States

alabamaarizonacaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaoklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.