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

Summer Tanager Population Trend in Alabama

All statesForest birds

Summer Tanager in Alabama has edged up: up 19% on the route-weighted index since 1968.

+19%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 Summer Tanager 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 Summer Tanager in Alabama. See the full index history below.

Summer Tanager Population Forecast in Alabama

If the recent trend holds, Summer Tanager in Alabama is projected to stay roughly flat through 2030, near 6.6 (95% range 5.0–8.2). A 5-year backtest shows a typical error of ±13.3%, with 80% of held-out values landing inside the 95% band.

-8%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 →
6.6Projected 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 →
5.0–8.295% 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 →
±13.3%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, Summer Tanager in Alabama is projected to stay roughly flat through 2030, near 6.6 (95% range 5.0–8.2). A 5-year backtest shows a typical error of ±13.3%, with 80% 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 →
20266.54.98.1
20276.55.08.1
20286.55.08.1
20296.65.08.1
20306.65.08.2

Summer Tanager Survey Routes in Alabama

Routes recording Summer Tanager 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 →
Epes3020241980
Liberty City2420111979
Borden Springs 22120242001
Liberty City 21920252017
Sprague1820251966
Warrior Std1720251966
Holt1720251993
Rock Chapel1620241995
Stevenson1520241996
Sprott-Cahaba Riv1520141999
Wallsboro1420251966
Vernon1420221996
Linden1220231968
Greensboro1220251966
Lanett1220241966
Brundidge1220211966
Jena1220251981
Calebee1220251993
Courtland1220231997
Nixburg 21220252000
Talladega1220251996
Helicon1220251996
Triana1220121999
Autaugaville1120251996
Swaim1020251966

Summer Tanager Population Trend in Other States

arizonaarkansascaliforniadelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamarylandmississippimissourinebraskanevadanew-jerseynew-mexiconorth-carolinaohiooklahomapennsylvaniasouth-carolinatennesseetexasutahvirginiawest-virginiawisconsin

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