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Species · Alabama · BBS 2025 Release · 1966–2024

Carolina Chickadee Population Trend in Alabama

All statesForest birds

Carolina Chickadee in Alabama has edged up: up 17% on the route-weighted index since 1968.

+17%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 →
109Routes 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 Carolina Chickadee 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 Carolina Chickadee in Alabama. See the full index history below.

Carolina Chickadee Population Forecast in Alabama

If the recent trend holds, Carolina Chickadee in Alabama is projected to stay roughly flat through 2029, near 8.8 (95% range 6.1–12). A 5-year backtest shows a typical error of ±9.1%, 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 →
8.8Projected 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 →
6.1–1295% 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 →
±9.1%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, Carolina Chickadee in Alabama is projected to stay roughly flat through 2029, near 8.8 (95% range 6.1–12). A 5-year backtest shows a typical error of ±9.1%, 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 →
20258.96.112
20268.96.112
20278.96.112
20288.96.112
20298.86.112

Carolina Chickadee Survey Routes in Alabama

Routes recording Carolina Chickadee 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 →
Wallsboro4220211966
Stevenson3420241996
Hillsboro3119961966
Brundidge3020211966
Mentone2820231993
Gastonburg2720241996
Epes2620241980
Sprague2320241966
Borden Springs 22320242001
Billingsley2220221966
Riverside2120131999
Triana2020121999
Howard1920241966
Grangeburg1620241967
Wedowee1520231996
Drummond1520242001
Valhermoso Spgs1420101966
Linden1420231968
Brantley1420231967
Blocton1420241969
Elamville1420241984
Childersburg1419991985
Mt Olive1320241966
Gainestown Ferry1320151999
Whitehall1220241983

Carolina Chickadee Population Trend in Other States

arkansasdelawarefloridageorgiaillinoisindianakansaskentuckylouisianamarylandmississippimissourinew-jerseynew-yorknorth-carolinaohiooklahomapennsylvaniasouth-carolinatennesseetexasvirginiawest-virginia

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