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

Chipping Sparrow Population Trend in Indiana

All statesForest birds

Chipping Sparrow in Indiana has surged: up 302% on the route-weighted index since 1968.

+302%Since 1968TrendPercent 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 →
69Routes 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 →
59YearsYears 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 IndianaNotable 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 increasecomputed 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 →

Chipping Sparrow has surged in Indiana: up 302% on the route-weighted index since 1968.

Chipping Sparrow Population Forecast in Indiana

If the recent trend holds, Chipping Sparrow in Indiana is projected to rise about 58% by 2030 — from 16 in 2025 to a central estimate of 26 (95% range 20–32). A 5-year backtest shows a typical error of ±55.4%, with 0% of held-out values landing inside the 95% band.

+58%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 →
26Projected 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 →
20–3295% 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 →
±55.4%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 Indiana is projected to rise about 58% by 2030 — from 16 in 2025 to a central estimate of 26 (95% range 20–32). A 5-year backtest shows a typical error of ±55.4%, with 0% of held-out values landing inside the 95% band.19662030
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 →
2026241831
2027251931
2028251931
2029251932
2030262032

Chipping Sparrow Survey Routes in Indiana

Routes recording Chipping Sparrow in Indiana.
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 →
Packertown4620041967
Brookville4620251966
Witts Station4320252000
Washington4120251987
Anderson3920252000
Maplewood3720212000
Thorntown2920251982
Middlebury2820251989
New Phila2820251982
Wallace2820241999
Galveston2620251981
Middletown2620251966
Decatur2620251999
Jamestown2420251986
South Bend2319911966
Monticello2320251981
New Brunswick2320252024
Kewanna2220221981
Wabash2220251981
Azalia2220251982
Portage2220042000
Muncie2119971981
Georgia2020251999
Kokomo2020241993
Swayzee1920251981

Chipping Sparrow Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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