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Species · Alabama · BBS 2026 Release · 1966–2025

Eastern Bluebird Population Trend in Alabama

All statesForest birds

Eastern Bluebird in Alabama has surged: up 137% on the route-weighted index since 1968.

+137%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 →
107Routes 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 AlabamaNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

long arc increasecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Eastern Bluebird has surged in Alabama: up 137% on the route-weighted index since 1968.

Eastern Bluebird Population Forecast in Alabama

If the recent trend holds, Eastern Bluebird in Alabama is projected to rise about 25% by 2030 — from 12 in 2025 to a central estimate of 14 (95% range 11–18). A 5-year backtest shows a typical error of ±22.7%, with 100% of held-out values landing inside the 95% band.

+25%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 →
14Projected 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 →
11–1895% 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 →
±22.7%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 Alabama is projected to rise about 25% by 2030 — from 12 in 2025 to a central estimate of 14 (95% range 11–18). A 5-year backtest shows a typical error of ±22.7%, 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 →
2026141017
2027141117
2028141118
2029141118
2030141118

Eastern Bluebird Survey Routes in Alabama

Routes recording Eastern Bluebird 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 →
St Florian2920251967
Fairview2720251989
Stevenson2720241996
Elamville2620251984
Elkmont2620251990
Choccolocco2520251984
Madrid2420231994
Mt Olive2320251966
Hillsboro2219961966
Lakeview2220251999
Greensport2120251966
Newton2120241966
Woodville2020241994
Talladega2020251996
Dearmanville1819831966
Grangeburg1820241968
Harrell1720251973
Oneonta1720251996
Wedowee1720231996
St. Elmo1720251998
Drummond1720242001
Howard1620251966
Calebee1620251994
Brundidge1520211966
Mentone1520231993

Eastern Bluebird Population Trend in Other States

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

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