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

Savannah Sparrow Population Trend in Oregon

All statesGrassland birds

Savannah Sparrow in Oregon has edged up: up 14% on the route-weighted index since 1970.

+14%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 →
101Routes 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 Savannah 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 Savannah Sparrow in Oregon. See the full index history below.

Savannah Sparrow Population Forecast in Oregon

If the recent trend holds, Savannah Sparrow in Oregon is projected to rise about 72% by 2030 — from 2.0 in 2025 to a central estimate of 3.5 (95% range 1.3–5.8). A 5-year backtest shows a typical error of ±63.6%, with 100% of held-out values landing inside the 95% band.

+72%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 →
3.5Projected 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 →
1.3–5.895% 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 →
±63.6%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, Savannah Sparrow in Oregon is projected to rise about 72% by 2030 — from 2.0 in 2025 to a central estimate of 3.5 (95% range 1.3–5.8). A 5-year backtest shows a typical error of ±63.6%, 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 →
20263.51.35.8
20273.51.35.8
20283.51.35.8
20293.51.35.8
20303.51.35.8

Savannah Sparrow Survey Routes in Oregon

Routes recording Savannah 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 →
Zumwalt5520051995
Modoc Point4320181969
Princeton3519851973
Modoc Point 23420252024
Green Mtn.2320251994
Dayton1920251973
Blitzen1819931972
Adair1720251971
Umatilla1720251988
Chinchalo1720251993
Bly1220011973
Flora1020091987
Salem1020251993
Lone Rock820241990
Bridgeport820221986
Mcminnville820251994
Harney Lake720241993
Svensen619921990
Fish Lake620251972
Fandango Can520241977
Eightmile520251990
Bly 2520242007
Green520252023
Ordnance419791974
Scio420251972

Savannah Sparrow Population Trend in Other States

alaskaarizonacaliforniacoloradoconnecticutdelawareidahoillinoisindianaiowakansaskentuckymainemarylandmassachusettsmichiganminnesotamissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiopennsylvaniarhode-islandsouth-dakotatennesseeutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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