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

Yellow-billed Cuckoo Population Trend in Alabama

All statesForest birds

Yellow-billed Cuckoo in Alabama has held roughly steady: up 1% on the route-weighted index since 1968.

+1%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 →
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 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 39% by 2030 — from 8.0 in 2025 to a central estimate of 4.9 (95% range 1.4–8.4). A 5-year backtest shows a typical error of ±23.5%, with 100% of held-out values landing inside the 95% band.

-39%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 →
4.9Projected 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 →
1.4–8.495% 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 →
±23.5%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 39% by 2030 — from 8.0 in 2025 to a central estimate of 4.9 (95% range 1.4–8.4). A 5-year backtest shows a typical error of ±23.5%, 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 →
20265.21.78.7
20275.11.68.7
20285.01.58.6
20295.01.48.5
20304.91.48.4

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
South2120251966
Sunny Eve1820251966
Cottonton1820251966
Blocton1720251969
Dearmanville1619831966
Wedgeworth1620251979
Calebee1520251993
Helicon1520251996
Sprott-Cahaba Riv1520141999
Holt1420251993
Sprague1320251966
Brundidge1320211966
Warrior Std1220251966
Escatawpa1220231983
Seale1220171996
Hillsboro1119961966
Linden1120231968
Harrell1120251968
Millry1120181970
Jena1120251981
Whitehall1120251983
Fairview1120251990

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 2026-08-14.