BirdAnalyst
Species · BCR 27 · BBS 2025 Release · 1966–2024

Yellow-billed Cuckoo In Southeastern Coastal Plain

All regionsSoutheastern Coastal PlainGeneralists

Yellow-billed Cuckoo in Southeastern Coastal Plain has held roughly steady: up 5% on the route-weighted index since 1968.

+5%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 →
343Routes In RegionSurvey 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 SignalsNotable 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 Southeastern Coastal Plain. See the full index history below.

Forecast

If the recent trend holds, Yellow-billed Cuckoo in Southeastern Coastal Plain is projected to fall about 14% by 2029 — from 6.1 in 2024 to a central estimate of 5.3 (95% range 2.5–8.0). A 5-year backtest shows a typical error of ±11.4%, with 100% of held-out values landing inside the 95% band.

-14%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 →
5.3Projected 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 →
2.5–8.095% 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 →
±11.4%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 Southeastern Coastal Plain is projected to fall about 14% by 2029 — from 6.1 in 2024 to a central estimate of 5.3 (95% range 2.5–8.0). A 5-year backtest shows a typical error of ±11.4%, 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 →
20255.52.78.2
20265.42.78.2
20275.42.68.1
20285.32.68.1
20295.32.58.0

Routes In Southeastern Coastal Plain

Routes recording Yellow-billed Cuckoo in Southeastern Coastal Plain.
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 →
Big SandyTENNESSEE382024
Trace LormanMISSISSIPPI362019
Rock ChapelALABAMA272024
Trace CentralMISSISSIPPI262022
Trace NorthMISSISSIPPI262018
EpesALABAMA252024
BargesGEORGIA252024
Gainestown FerryALABAMA242015
GreensboroALABAMA232024
Fort AdamsMISSISSIPPI222022
MansfieldTENNESSEE222024
Trace SouthMISSISSIPPI212019
ForestMISSISSIPPI202024
StarMISSISSIPPI202024
SpragueALABAMA192024
ScoobaMISSISSIPPI181982
NewsomsVIRGINIA182024
Mt CarmelMISSISSIPPI172016
Sheep RidgeNORTH-CAROLINA172024
HowardALABAMA162024
PlettenbergLOUISIANA162022
NorwoodLOUISIANA162024
CottontonALABAMA152024
WhitehallALABAMA152024
Sprott-Cahaba RivALABAMA152014

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