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

Savannah Sparrow Population Trend in Oregon

All statesGrassland birds

Savannah Sparrow in Oregon has edged up: up 22% on the route-weighted index since 1970.

+22%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 →
100Routes 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 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 45% by 2029 — from 2.5 in 2024 to a central estimate of 3.7 (95% range 1.4–5.9). A 5-year backtest shows a typical error of ±51.4%, with 100% of held-out values landing inside the 95% band.

+45%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 →
3.7Projected 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 →
1.4–5.995% 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 →
±51.4%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, Savannah Sparrow in Oregon is projected to rise about 45% by 2029 — from 2.5 in 2024 to a central estimate of 3.7 (95% range 1.4–5.9). A 5-year backtest shows a typical error of ±51.4%, 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 →
20253.71.45.9
20263.71.45.9
20273.71.45.9
20283.71.45.9
20293.71.45.9

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 22920242024
Adair2720241971
Green Mtn.2320231994
Salem2120241993
Blitzen1819931972
Dayton1620241973
Mcminnville1620241994
Chinchalo1620241993
Umpqua1520241970
Joseph1320241971
Bly1220011973
Umatilla1220231988
Flora1020091987
Lone Rock820241990
Bridgeport820221986
Pendleton720241982
Harney Lake720241993
Svensen619921990
Fish Lake620241972
Fandango Can520241977
Scio520241972
Bly 2520242007

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 2026-05-22.