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

Long-billed Curlew Population Trend in Oregon

All statesShorebirds

Long-billed Curlew in Oregon has held roughly steady: up 4% on the route-weighted index since 1971.

+4%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 →
55YearsYears 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 fall about 33% by 2029 — from 0.80 in 2024 to a central estimate of 0.53 (95% range 0.00–1.5). A 5-year backtest shows a typical error of ±26.8%, with 100% of held-out values landing inside the 95% band.

-33%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 →
0.53Projected 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 →
0.00–1.595% 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 →
±26.8%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 fall about 33% by 2029 — from 0.80 in 2024 to a central estimate of 0.53 (95% range 0.00–1.5). A 5-year backtest shows a typical error of ±26.8%, with 100% of held-out values landing inside the 95% band.19692029
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 →
20250.580.001.5
20260.570.001.5
20270.560.001.5
20280.550.001.5
20290.530.001.5

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 →
Trout Creek2420211996
Catlow Rim2020241994
Malheur Nwr1520221986
Alvord Lake1320241969
Princeton1119851972
Adrian1120211985
Fish Lake720241972
Chinchalo720241993
Crane520241993
Summit Pr420241987
Warner Vally420241993
Bowden Hills420242017
Flook Lake420242024
Three Forks320192008
Bly 2320232010
Battle Mtn320242024
Blitzen 2220021996
Ordnance219791971
Albee220232013
Wickiup220221995
Fandango Can220121990
Joseph220232006
Sparta220011979
Montague220181974
Mount Vernon220121991

Long-billed Curlew Population Trend in Other States

californiacoloradoidahokansasmontananebraskanevadanew-mexiconorth-dakotaoklahomasouth-dakotatexasutahwashingtonwyoming

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