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

Indigo Bunting Population Trend in Indiana

All statesForest birds

Indigo Bunting in Indiana has edged down: down 19% on the route-weighted index since 1968.

-19%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 Indigo Bunting 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 Indigo Bunting in Indiana. See the full index history below.

Indigo Bunting Population Forecast in Indiana

If the recent trend holds, Indigo Bunting in Indiana is projected to stay roughly flat through 2030, near 25 (95% range 13–38). A 5-year backtest shows a typical error of ±27%, with 100% of held-out values landing inside the 95% band.

+9%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 →
25Projected 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 →
13–3895% 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 →
±27%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, Indigo Bunting in Indiana is projected to stay roughly flat through 2030, near 25 (95% range 13–38). A 5-year backtest shows a typical error of ±27%, 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 →
2026261438
2027261438
2028261338
2029261338
2030251338

Indigo Bunting Survey Routes in Indiana

Routes recording Indigo Bunting 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 →
Brookville6620251966
Newberry5720251999
Washington5220251987
Witts Station5220252000
Wallace5020241999
Georgia4820251999
Indian Spgs4620251982
New Phila4320251982
Cyprss4020251999
Clear Spring3920251981
Celestine3820251979
Scottsburg3820251982
Cumback3720251966
Evansville3720221966
Azalia3620251982
Brazil3220251966
Spencer3220241967
New Castle3220242002
Cross Plains3120251999
Anderson2820252000
Pimento2720251981
Jamestown2720251986
Vevay2520251966
Corydon2420251966
Maplewood2420212000

Indigo Bunting Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaillinoisiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawest-virginiawisconsinwyoming

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