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

Eastern Bluebird Population Trend in Indiana

All statesForest birds

Eastern Bluebird in Indiana has edged up: up 15% on the route-weighted index since 1968.

+15%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 →
67Routes 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 Eastern Bluebird 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 Eastern Bluebird in Indiana. See the full index history below.

Eastern Bluebird Population Forecast in Indiana

If the recent trend holds, Eastern Bluebird in Indiana is projected to rise about 22% by 2030 — from 4.9 in 2025 to a central estimate of 6.0 (95% range 2.9–9.1). A 5-year backtest shows a typical error of ±32.8%, 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 →
6.0Projected 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 →
2.9–9.195% 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 →
±32.8%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, Eastern Bluebird in Indiana is projected to rise about 22% by 2030 — from 4.9 in 2025 to a central estimate of 6.0 (95% range 2.9–9.1). A 5-year backtest shows a typical error of ±32.8%, 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 →
20265.82.79.0
20275.92.89.0
20285.92.89.0
20296.02.89.1
20306.02.99.1

Eastern Bluebird Survey Routes in Indiana

Routes recording Eastern Bluebird 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 →
Lakeville1920241993
Packertown1820041969
Spencer1820241967
Scottsburg1820251982
Belmont1520241983
New Phila1220251982
Newberry1220251999
Monticello1120251982
Indian Spgs1120251982
Celestine1020251979
Lagrange1020251999
Wallace1020242000
Knox920251981
Clear Spring920251981
Ellis820241966
Brookville820251966
Georgia820251999
Packertown 2820252005
Thorntown720251984
Witts Station720252000
Friendswood620241986
Jamestown620251986
Cumback620251966
Vevay620251966
Anderson620252000

Eastern Bluebird Population Trend in Other States

alabamaarizonaarkansascoloradoconnecticutdelawarefloridageorgiaillinoisiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsinwyoming

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