BirdAnalyst
Species · BCR 27 · BBS 2026 Release · 1966–2025

Yellow-billed Cuckoo In Southeastern Coastal Plain

All regionsSoutheastern Coastal PlainForest birds

Yellow-billed Cuckoo in Southeastern Coastal Plain has edged up: up 11% on the route-weighted index since 1968.

+11%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 →
344Routes 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 →
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 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.

Yellow-billed Cuckoo In Southeastern Coastal Plain Population Forecast

If the recent trend holds, Yellow-billed Cuckoo in Southeastern Coastal Plain is projected to fall about 19% by 2030 — from 6.5 in 2025 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.

-19%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 →
5.3Projected 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 →
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 19% by 2030 — from 6.5 in 2025 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.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 →
20265.52.78.2
20275.42.78.2
20285.42.68.1
20295.32.68.1
20305.32.58.0

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 →
Trace LormanMISSISSIPPI362019
Rock ChapelALABAMA272024
Trace NorthMISSISSIPPI262018
EpesALABAMA252024
Gainestown FerryALABAMA242015
Trace HindsMISSISSIPPI242025
HumboldtTENNESSEE232025
Fort AdamsMISSISSIPPI222022
SouthALABAMA212025
BentonMISSISSIPPI212025
Trace SouthMISSISSIPPI212019
Broad CreekNORTH-CAROLINA212025
MansfieldTENNESSEE202025
Broad BranchFLORIDA192025
EmbryMISSISSIPPI192025
CottontonALABAMA182025
ScoobaMISSISSIPPI181982
NewsomsVIRGINIA182024
BloctonALABAMA172025
MiccosukeeFLORIDA172025
Mt CarmelMISSISSIPPI172016
Milltail CrNORTH-CAROLINA172025
Sheep RidgeNORTH-CAROLINA172025
WedgeworthALABAMA162025
PlettenbergLOUISIANA162022

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.