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

American Goldfinch Population Trend in Indiana

All statesGeneralists

American Goldfinch in Indiana has held roughly steady: down 8% on the route-weighted index since 1968.

-8%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 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 24% by 2029 — from 10 in 2024 to a central estimate of 12 (95% range 7.3–18). A 5-year backtest shows a typical error of ±50.8%, with 60% of held-out values landing inside the 95% band.

+24%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 →
12Projected 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 →
7.3–1895% 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 →
±50.8%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 24% by 2029 — from 10 in 2024 to a central estimate of 12 (95% range 7.3–18). A 5-year backtest shows a typical error of ±50.8%, with 60% 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 →
2025127.218
2026127.218
2027127.218
2028127.218
2029127.318

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 →
Portage 23920242005
Newberry3520241999
Packertown2720041967
Witts Station2720242000
Plainfield2519991999
Fowler2420241966
Brookville2220241966
Middlebury1820241989
Middletown1820241966
Sexton1820241981
Azalia1720241982
Indian Spgs1720241982
Thorntown1420241982
Berne1320241966
Georgia1320241999
Portage1320042000
Lakeville1320241993
New Phila1220241982
Vevay1220241966
Frankfort1220221999
Decatur1220241999
Monticello1120241981
Galveston1120241981
Celestine1120241979
South Bend1019911966

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 2026-05-22.