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

American Crow Population Trend in Oregon

All statesGeneralists

American Crow in Oregon has edged down: down 20% on the route-weighted index since 1970.

-20%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 →
107Routes 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 American Crow 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 American Crow in Oregon. See the full index history below.

American Crow Population Forecast in Oregon

If the recent trend holds, American Crow in Oregon is projected to rise about 10% by 2030 — from 6.8 in 2025 to a central estimate of 7.5 (95% range 4.6–10). A 5-year backtest shows a typical error of ±13.5%, with 100% of held-out values landing inside the 95% band.

+10%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 →
7.5Projected 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 →
4.6–1095% 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 →
±13.5%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, American Crow in Oregon is projected to rise about 10% by 2030 — from 6.8 in 2025 to a central estimate of 7.5 (95% range 4.6–10). A 5-year backtest shows a typical error of ±13.5%, with 100% 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 →
20267.64.810
20277.64.810
20287.54.710
20297.54.710
20307.54.610

American Crow Survey Routes in Oregon

Routes recording American Crow 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 →
Tualatin9820251968
Imnaha5920251968
Wedderburn5820251972
Scio4320251971
Glasgow4220251986
Elkton3220251972
Catlow Rim3120251993
Hauser2919851970
Canby2920251993
Sandy River2920061993
Emigrant Lk2720011972
Garfield2220251973
Prospect2120251993
Ordnance2019791971
Salem2020251993
Hazel Camp1920221975
Green1920251994
Fish Lake1820251972
Nicolai Mtn.1820251993
Svensen1719921990
Coquille1720251994
Umatilla1420251988
Timber1320171968
Emigrant Lake 21320252002
Dayton1220251973

American Crow 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.