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

American Goldfinch Population Trend in Indiana

All statesForest birds

American Goldfinch in Indiana has held roughly steady: down 6% on the route-weighted index since 1968.

-6%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 American Goldfinch 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 →

No notable trend signals for American Goldfinch in Indiana. See the full index history below.

American Goldfinch Population Forecast in Indiana

If the recent trend holds, American Goldfinch in Indiana is projected to rise about 22% by 2030 — from 10 in 2025 to a central estimate of 12 (95% range 7.1–18). A 5-year backtest shows a typical error of ±40.9%, with 100% of held-out values landing inside the 95% band.

+22%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 →
12Projected 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 →
7.1–1895% 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 →
±40.9%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, American Goldfinch in Indiana is projected to rise about 22% by 2030 — from 10 in 2025 to a central estimate of 12 (95% range 7.1–18). A 5-year backtest shows a typical error of ±40.9%, with 100% 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 →
2026127.117
2027127.117
2028127.117
2029127.117
2030127.118

American Goldfinch Survey Routes in Indiana

Routes recording American Goldfinch 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 →
Witts Station3420252000
Newberry3420251999
Cuba2920252017
Packertown2720041967
Brookville2620251966
Plainfield2519991999
Sexton1820241981
Indian Spgs1820251982
Thorntown1720251982
Middletown1720251966
Anderson1720252000
Knox1520251981
Middlebury1320251989
Lagrange1320251999
Portage1320042000
Lakeville1320241993
Celestine1220251979
Packertown 21220252005
Fowler1120251966
Wabash1120251981
Berne1120251966
Brazil1120251966
Milroy1120251966
South Bend1019911966
Columbia Cty1020241981

American Goldfinch Population Trend in Other States

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

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