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

Chipping Sparrow Population Trend in Oregon

All statesGeneralists

Chipping Sparrow in Oregon has edged down: down 23% on the route-weighted index since 1970.

-23%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 →
116Routes 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 Chipping Sparrow 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 Chipping Sparrow in Oregon. See the full index history below.

Chipping Sparrow Population Forecast in Oregon

If the recent trend holds, Chipping Sparrow in Oregon is projected to fall about 13% by 2029 — from 7.2 in 2024 to a central estimate of 6.2 (95% range 3.3–9.1). A 5-year backtest shows a typical error of ±12.4%, with 100% of held-out values landing inside the 95% band.

-13%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 →
6.2Projected 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 →
3.3–9.195% 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 →
±12.4%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, Chipping Sparrow in Oregon is projected to fall about 13% by 2029 — from 7.2 in 2024 to a central estimate of 6.2 (95% range 3.3–9.1). A 5-year backtest shows a typical error of ±12.4%, with 100% of held-out values landing inside the 95% band.19682029
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 →
20256.53.69.5
20266.43.59.4
20276.43.49.3
20286.33.49.2
20296.23.39.1

Chipping Sparrow Survey Routes in Oregon

Routes recording Chipping Sparrow 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 →
Ochoco8719821972
Barnhouse5920241998
Barnes Val5719871971
Monument4120241993
Bald Mtn.3620241992
Desolation3520071993
Eagle Creek2920221993
Sisters2720241997
Silvies2720241994
Black Mtn.2620041993
Hells Canyon2520221992
Donnelly2520061994
Newbridge2220241992
Paisley2120241973
Logdell2020241971
Camp Sherman2019961972
Hash Rock2020241983
Badger Creek2020241992
Silver Creek1920241984
Flora1820231986
Bly1820011973
Howard Mdws.1620241992
Troy1620241992
Paunina1620241993
Lapham Res.1520241992

Chipping Sparrow Population Trend in Other States

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

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