BirdAnalyst
Species · BCR 23 · BBS 2026 Release · 1966–2025

Yellow-billed Cuckoo In Prairie Hardwood Transition

All regionsPrairie Hardwood TransitionForest birds

Yellow-billed Cuckoo in Prairie Hardwood Transition has declined: down 47% on the route-weighted index since 1968.

-47%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 →
151Routes 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 Prairie Hardwood Transition. See the full index history below.

Yellow-billed Cuckoo In Prairie Hardwood Transition Population Forecast

If the recent trend holds, Yellow-billed Cuckoo in Prairie Hardwood Transition is projected to rise about 193% by 2030 — from 0.17 in 2025 to a central estimate of 0.50 (95% range 0.00–1.1). A 5-year backtest shows a typical error of ±92.1%, with 80% of held-out values landing inside the 95% band.

+193%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 →
0.50Projected 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 →
0.00–1.195% 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 →
±92.1%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 Prairie Hardwood Transition is projected to rise about 193% by 2030 — from 0.17 in 2025 to a central estimate of 0.50 (95% range 0.00–1.1). A 5-year backtest shows a typical error of ±92.1%, with 80% 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 →
20260.520.001.1
20270.510.001.1
20280.510.001.1
20290.500.001.1
20300.500.001.1

Routes In Prairie Hardwood Transition

Routes recording Yellow-billed Cuckoo in Prairie Hardwood Transition.
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 →
Barry S.G.A. 2MICHIGAN172019
Pt WashingtnWISCONSIN72021
HomerMICHIGAN52021
BismarkOHIO51995
UnityWISCONSIN52021
HowardsvilleMICHIGAN42024
MottvilleMICHIGAN42023
Wis RapidsWISCONSIN42022
Mukwonago 2WISCONSIN42023
South BendINDIANA31984
Packertown 2INDIANA32019
Bell OakMICHIGAN32007
PrattvilleMICHIGAN32021
AlmenaMICHIGAN32015
Rolling GrndWISCONSIN32023
Fall RiverWISCONSIN32024
GrimmsWISCONSIN32021
GuilfordILLINOIS22021
KnoxINDIANA22022
MiddleburyINDIANA22021
PackertownINDIANA22004
EllisINDIANA22021
FestinaIOWA22021
Big RapidsMICHIGAN21988
GalesburgMICHIGAN22024

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