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

Chipping Sparrow Population Trend in Indiana

All statesGeneralists

Chipping Sparrow in Indiana has surged: up 308% on the route-weighted index since 1968.

+308%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 →
58YearsYears 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 308% 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 69% by 2029 — from 15 in 2024 to a central estimate of 26 (95% range 20–32). A 5-year backtest shows a typical error of ±50.9%, with 0% of held-out values landing inside the 95% band.

+69%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 →
26Projected 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 →
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 →
±50.9%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 69% by 2029 — from 15 in 2024 to a central estimate of 26 (95% range 20–32). A 5-year backtest shows a typical error of ±50.9%, with 0% of held-out values landing inside the 95% band.19662029
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 →
2025251930
2026251931
2027252031
2028262032
2029262032

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
Maplewood3720212000
Witts Station3520242000
Decatur3320241999
Galveston3220241981
Washington3120241987
Wallace2820241999
Knox2720241981
Swayzee2720231981
Jamestown2720241986
Azalia2720241982
Celestine2520241979
Lagrange2520241999
Anderson2520242000
South Bend2319911966
Kewanna2220221981
Thorntown2220241982
Cumback2220211966
Portage2220042000
Muncie2119971981
Wabash2120241981
Indian Spgs2120241982
New Phila2120241982
Middletown2020241966
Packertown 22020242005

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 2026-05-22.