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

Ruby-throated Hummingbird Population Trend in Alabama

All statesGeneralists

Ruby-throated Hummingbird in Alabama has risen sharply: up 67% on the route-weighted index since 1968.

+67%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 →
100Routes 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 Ruby-throated Hummingbird 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 →

Ruby-throated Hummingbird has risen sharply in Alabama: up 67% on the route-weighted index since 1968.

Ruby-throated Hummingbird Population Forecast in Alabama

If the recent trend holds, Ruby-throated Hummingbird in Alabama is projected to rise about 73% by 2029 — from 0.44 in 2024 to a central estimate of 0.76 (95% range 0.49–1.0). A 5-year backtest shows a typical error of ±42.1%, with 60% of held-out values landing inside the 95% band.

+73%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 →
0.76Projected 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 →
0.49–1.095% 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 →
±42.1%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, Ruby-throated Hummingbird in Alabama is projected to rise about 73% by 2029 — from 0.44 in 2024 to a central estimate of 0.76 (95% range 0.49–1.0). A 5-year backtest shows a typical error of ±42.1%, with 60% 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 →
20250.740.471.0
20260.740.471.0
20270.750.481.0
20280.760.481.0
20290.760.491.0

Ruby-throated Hummingbird Survey Routes in Alabama

Routes recording Ruby-throated Hummingbird 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 →
Linden420231968
Sprague420231966
Gastonburg420242000
Drummond420212007
Trade320111970
Maytown320231966
Wallsboro320211969
Brundidge320171970
Epes320241983
Fairview320221989
Holt320231993
Woodville320242007
Sprott-Cahaba Riv320141999
St Florian220231971
Millerville220231967
Dearmanville219771967
Smyer Lake220231972
Howard220231973
Riderwood220221967
Billingsley220221973
Newton220231970
Mclellan220001980
Blocton220171969
Wedgeworth220221979
Liberty City220091984

Ruby-throated Hummingbird Population Trend in Other States

arkansasconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourinebraskanew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsin

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