BirdAnalyst
Species · BCR 29 · BBS 2026 Release · 1966–2025

Yellow-billed Cuckoo In Piedmont

All regionsPiedmontForest birds

Yellow-billed Cuckoo in Piedmont 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 →
167Routes 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 Piedmont. See the full index history below.

Yellow-billed Cuckoo In Piedmont Population Forecast

If the recent trend holds, Yellow-billed Cuckoo in Piedmont is projected to stay roughly flat through 2030, near 3.2 (95% range 0.77–5.6). A 5-year backtest shows a typical error of ±23.8%, with 100% of held-out values landing inside the 95% band.

-5%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 →
3.2Projected 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 →
0.77–5.695% 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 →
±23.8%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 Piedmont is projected to stay roughly flat through 2030, near 3.2 (95% range 0.77–5.6). A 5-year backtest shows a typical error of ±23.8%, 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 →
20263.30.855.7
20273.20.835.6
20283.20.815.6
20293.20.795.6
20303.20.775.6

Routes In Piedmont

Routes recording Yellow-billed Cuckoo in Piedmont.
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 →
DurhamNORTH-CAROLINA142025
LincolntonGEORGIA122017
Lincolnton 2GEORGIA112025
BullockNORTH-CAROLINA112025
Liberty CityALABAMA102011
NixburgALABAMA101999
GrovetownGEORGIA102019
BendersvillePENNSYLVANIA102024
Salem XrdSOUTH-CAROLINA102019
JoannaSOUTH-CAROLINA102025
DavidVIRGINIA102013
WylliesburgVIRGINIA102019
Carters Brdg 2VIRGINIA102025
Liberty City 2ALABAMA92025
Curry HillGEORGIA92019
OakboroNORTH-CAROLINA92025
GoldstonNORTH-CAROLINA92022
FinchleyVIRGINIA92021
MaxeysGEORGIA82024
GuptonNORTH-CAROLINA82025
HallVIRGINIA82025
RinggoldVIRGINIA82025
OlneyMARYLAND72025
MadonnaMARYLAND72022
AspersPENNSYLVANIA71983

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