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

Yellow-billed Cuckoo Population Trend in Alabama

All statesGeneralists

Yellow-billed Cuckoo in Alabama has held roughly steady: down 8% on the route-weighted index since 1968.

-8%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 →
108Routes 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 Yellow-billed Cuckoo 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 Yellow-billed Cuckoo in Alabama. See the full index history below.

Yellow-billed Cuckoo Population Forecast in Alabama

If the recent trend holds, Yellow-billed Cuckoo in Alabama is projected to fall about 29% by 2029 — from 6.8 in 2024 to a central estimate of 4.8 (95% range 1.3–8.3). A 5-year backtest shows a typical error of ±17.8%, with 100% of held-out values landing inside the 95% band.

-29%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 →
4.8Projected 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 →
1.3–8.395% 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 →
±17.8%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, Yellow-billed Cuckoo in Alabama is projected to fall about 29% by 2029 — from 6.8 in 2024 to a central estimate of 4.8 (95% range 1.3–8.3). A 5-year backtest shows a typical error of ±17.8%, 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 →
20255.11.68.6
20265.01.58.5
20274.91.48.4
20284.81.48.3
20294.81.38.3

Yellow-billed Cuckoo Survey Routes in Alabama

Routes recording Yellow-billed Cuckoo 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 →
Rock Chapel2720241995
Epes2520241980
Gainestown Ferry2420151999
Greensboro2320241966
Sprague1920241966
Dearmanville1619831966
Howard1620241966
Cottonton1520241966
Whitehall1520241983
Sprott-Cahaba Riv1520141999
Blocton1420241969
Brundidge1320211966
Escatawpa1220231983
Seale1220171996
Helicon1220241996
Hillsboro1119961966
Linden1120231968
Millry1120181970
Liberty City 21120242017
Stevenson1120241996
Liberty City1020111979
Nixburg1019991995
Riverside1020131999
St Florian920241967
Summitt919811966

Yellow-billed Cuckoo Population Trend in Other States

arizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawest-virginiawisconsinwyoming

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