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

Willet Population Trend in Oregon

All statesShorebirds

Willet in Oregon has surged: up 90% on the route-weighted index since 1972.

+90%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 →
27Routes 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 →
52YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Willet 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 →

long arc increasecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Willet has surged in Oregon: up 90% on the route-weighted index since 1972.

Willet Population Forecast in Oregon

If the recent trend holds, Willet in Oregon is projected to rise about 120% by 2029 — from 0.21 in 2024 to a central estimate of 0.47 (95% range 0.00–1.0). A 5-year backtest shows a typical error of ±92.9%, with 100% of held-out values landing inside the 95% band.

+120%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 →
0.47Projected 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 →
0.00–1.095% 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 →
±92.9%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, Willet in Oregon is projected to rise about 120% by 2029 — from 0.21 in 2024 to a central estimate of 0.47 (95% range 0.00–1.0). A 5-year backtest shows a typical error of ±92.9%, 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 →
20250.470.001.0
20260.470.001.0
20270.470.001.0
20280.470.001.0
20290.470.001.0

Willet Survey Routes in Oregon

Routes recording Willet 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 Nwr3020221987
Lapham Res.1020222022
Trout Creek720171996
Wickiup620111969
Princeton619841972
Bly620011973
Sheaville620242012
Warner Vally520231993
Harney Lake420041993
Blitzen 2320241995
Bly 2320242010
Blizzard Gap320241984
Three Forks220212005
Modoc Point220182018
Fish Lake220231977
Catlow Rim220241995
Chinchalo220241995
Summit Pr120082002
Alvord Lake120241970
Barnes Val119741974
Mount Vernon120011988
Silver Creek120222004
Adrian119921992
Crane119961996
Merrill120221993

Willet Population Trend in Other States

alabamacaliforniacoloradoconnecticutdelawarefloridaidaholouisianamainemarylandmassachusettsminnesotamontananebraskanevadanew-jerseynew-yorknorth-carolinanorth-dakotasouth-carolinasouth-dakotatexasutahvirginiawyoming

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