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

Indigo Bunting Population Trend in Alabama

All statesGeneralists

Indigo Bunting in Alabama 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 →
108Routes 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 AlabamaNotable 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 Alabama. See the full index history below.

Indigo Bunting Population Forecast in Alabama

If the recent trend holds, Indigo Bunting in Alabama is projected to stay roughly flat through 2029, near 27 (95% range 20–34). A 5-year backtest shows a typical error of ±10.9%, with 100% of held-out values landing inside the 95% band.

+1%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 →
27Projected 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 →
20–3495% 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 →
±10.9%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, Indigo Bunting in Alabama is projected to stay roughly flat through 2029, near 27 (95% range 20–34). A 5-year backtest shows a typical error of ±10.9%, 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 →
2025272034
2026272034
2027272034
2028272034
2029272034

Indigo Bunting Survey Routes in Alabama

Routes recording Indigo Bunting in Alabama.
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 →
Liberty City7820111979
Swaim7720241966
Epes7120241980
Stevenson7020241996
Hillsboro6619961966
Borden Springs 26120242001
Rock Chapel5920241995
Wheeler Dam5620231993
Sprott-Cahaba Riv5320141999
Elamville5220241984
Courtland5220231997
Gainestown Ferry5220151999
Valhermoso Spgs5120101966
Borden Sprng4919981993
Gastonburg4920241996
Howard4720241966
Elkmont4720241990
Holt4420241993
Valhermoso Spg 24420142014
Mt Olive4220241966
Linden4220231968
Warrior Std4120241966
Talladega4120241996
Triana4020121999
Wedgeworth3920241979

Indigo Bunting Population Trend in Other States

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

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.