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

Ring-billed Gull Population Trend in Oregon

All statesWetland birds

Ring-billed Gull in Oregon has declined: down 45% on the route-weighted index since 1972.

-45%Since 1972TrendPercent 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 →
41Routes 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 →
54YearsYears 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 OregonNotable 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 Oregon. See the full index history below.

Ring-billed Gull Population Forecast in Oregon

If the recent trend holds, Ring-billed Gull in Oregon is projected to rise about 569% by 2029 — from 0.19 in 2024 to a central estimate of 1.3 (95% range 0.00–5.3). A 5-year backtest shows a typical error of ±248.3%, with 100% of held-out values landing inside the 95% band.

+569%Change by 2029TrendPercent 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 →
1.3Projected 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–5.395% 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 →
±248.3%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 Oregon is projected to rise about 569% by 2029 — from 0.19 in 2024 to a central estimate of 1.3 (95% range 0.00–5.3). A 5-year backtest shows a typical error of ±248.3%, with 100% of held-out values landing inside the 95% band.19702029
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 →
20251.40.005.4
20261.40.005.4
20271.40.005.4
20281.30.005.3
20291.30.005.3

Ring-billed Gull Survey Routes in Oregon

Routes recording Ring-billed Gull in Oregon.
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 →
Umatilla9220231988
Crane4719981995
Lakeview4620102010
Princeton4319851972
Montague3319891975
Sheaville2320212012
Fish Lake2119981972
Harney Lake1920061993
Blizzard Gap1720241985
Cecil1520002000
Ordnance1319781971
Hauser919721971
Malheur Nwr819981986
Fandango Can620231988
Merrill620221993
Bly519731973
Catlow Rim520222017
Lapham Res.420031996
Modoc Point320181970
Barnes Val319851985
Warner Vally320231994
Joseph219971990
Sparta220001973
Hazel Camp219801978
Mikkalo219961996

Ring-billed Gull Population Trend in Other States

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

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