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Species · Oregon · BBS 2026 Release · 1966–2025

Killdeer Population Trend in Oregon

All statesShorebirds

Killdeer in Oregon has fallen sharply: down 55% on the route-weighted index since 1970.

-55%Since 1970TrendPercent 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 →
110Routes 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 →
57YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Killdeer 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 declinecomputed 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 →

Killdeer has fallen sharply in Oregon: down 55% on the route-weighted index since 1970.

Killdeer Population Forecast in Oregon

If the recent trend holds, Killdeer in Oregon is projected to fall about 68% by 2030 — from 2.7 in 2025 to a central estimate of 0.86 (95% range 0.00–2.6). A 5-year backtest shows a typical error of ±57.1%, with 60% of held-out values landing inside the 95% band.

-68%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 →
0.86Projected 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 →
0.00–2.695% 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 →
±57.1%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, Killdeer in Oregon is projected to fall about 68% by 2030 — from 2.7 in 2025 to a central estimate of 0.86 (95% range 0.00–2.6). A 5-year backtest shows a typical error of ±57.1%, with 60% of held-out values landing inside the 95% band.19682030
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 →
20261.20.003.0
20271.10.002.9
20281.00.002.8
20290.940.002.7
20300.860.002.6

Killdeer Survey Routes in Oregon

Routes recording Killdeer 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 →
Adair2820251971
Sparta2720251971
Ordnance2519791971
Umatilla1820251988
Clover Creek1720251972
Merrill1420221993
Bridgeport1320251986
Canby1220251993
Zumwalt1220051995
Alvord Lake1120251968
Willow Spg1119711969
Dayton1120251974
Bly1020011973
Coquille920221995
Catlow Rim920251993
Pendleton720251978
Modoc Point 2720252024
Trout Creek720251996
Deschutes620251968
Adrian620251984
Emigrant Lk620011972
Harney Lake620241993
Sheaville620252012
Modoc Point520181969
Princeton519851972

Killdeer Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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