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

Eastern Bluebird Population Trend in Indiana

All statesForest birds

Eastern Bluebird in Indiana has edged up: up 14% on the route-weighted index since 1968.

+14%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 →
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 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 fall about 15% by 2029 — from 7.1 in 2024 to a central estimate of 6.0 (95% range 2.9–9.2). A 5-year backtest shows a typical error of ±32.6%, with 100% of held-out values landing inside the 95% band.

-15%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 →
6.0Projected 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 →
2.9–9.295% 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 →
±32.6%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 fall about 15% by 2029 — from 7.1 in 2024 to a central estimate of 6.0 (95% range 2.9–9.2). A 5-year backtest shows a typical error of ±32.6%, 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 →
20255.92.79.0
20265.92.89.0
20275.92.89.1
20286.02.99.1
20296.02.99.2

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 →
New Phila2220241982
Vevay2020241966
Scottsburg2020241982
Lakeville1920241993
Packertown1820041969
Spencer1820241967
Celestine1720241979
Belmont1520241983
Brookville1520241966
Witts Station1420242000
Jamestown1320241986
Azalia1320241982
Lagrange1320241999
Knox1220241981
Georgia1120241999
Wallace1020242000
Indian Spgs920241982
Corydon920241966
Ellis820241966
Galveston820241984
Pimento820241982
Cross Plains820241999
Middlebury720241990
Decatur720242000
Newberry720241999

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 2026-05-22.