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

Long-billed Curlew Population Trend in Oregon

All statesShorebirds

Long-billed Curlew in Oregon has held roughly steady: down 3% on the route-weighted index since 1971.

-3%Since 1971TrendPercent 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 →
45Routes 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 Long-billed Curlew 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 Long-billed Curlew in Oregon. See the full index history below.

Long-billed Curlew Population Forecast in Oregon

If the recent trend holds, Long-billed Curlew in Oregon is projected to stay roughly flat through 2030, near 0.52 (95% range 0.00–1.4). A 5-year backtest shows a typical error of ±19%, with 100% of held-out values landing inside the 95% band.

-8%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 →
0.52Projected 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 →
0.00–1.495% 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 →
±19%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, Long-billed Curlew in Oregon is projected to stay roughly flat through 2030, near 0.52 (95% range 0.00–1.4). A 5-year backtest shows a typical error of ±19%, with 100% of held-out values landing inside the 95% band.19692030
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 →
20260.570.001.5
20270.560.001.5
20280.540.001.5
20290.530.001.5
20300.520.001.4

Long-billed Curlew Survey Routes in Oregon

Routes recording Long-billed Curlew 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 →
Malheur Nwr1520221986
Princeton1119851972
Adrian1120211985
Bowden Hills1120252017
Chinchalo920251993
Trout Creek920251996
Catlow Rim820251994
Fish Lake720241972
Battle Mtn620252024
Alvord Lake520251969
Crane520241993
Warner Vally420241993
Umatilla420251989
Flook Lake420242024
Three Forks320192008
Bly 2320232010
Blitzen 2220021996
Ordnance219791971
Summit Pr220251987
Wickiup220221995
Fandango Can220121990
Joseph220232006
Montague220181974
Mount Vernon220121991
Mikkalo220212000

Long-billed Curlew Population Trend in Other States

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