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

Indigo Bunting Population Trend in Indiana

All statesGeneralists

Indigo Bunting in Indiana has edged down: down 22% on the route-weighted index since 1968.

-22%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 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 rise about 19% by 2029 — from 22 in 2024 to a central estimate of 26 (95% range 13–38). A 5-year backtest shows a typical error of ±28.8%, with 100% of held-out values landing inside the 95% band.

+19%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 →
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 →
±28.8%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, Indigo Bunting in Indiana is projected to rise about 19% by 2029 — from 22 in 2024 to a central estimate of 26 (95% range 13–38). A 5-year backtest shows a typical error of ±28.8%, with 100% 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 →
2025271439
2026261439
2027261439
2028261438
2029261338

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 →
Georgia5820241999
Newberry5620241999
Cumback5420211966
Brookville5320241966
Celestine5220241979
Wallace5020241999
Cross Plains5020241999
Washington4720241987
Indian Spgs4720241982
New Phila4520241982
Brazil4420241966
Evansville3720221966
Scottsburg3420241982
Spencer3220241967
Clear Spring3220241981
Vevay3220241966
New Castle3220242002
Witts Station3220242000
Cyprss2820241999
Pimento2620241981
Azalia2520241982
Maplewood2420212000
Knox2220241981
Packertown2220041967
Thorntown2120241982

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 2026-05-22.