BirdAnalyst
Species · BCR 22 · BBS 2026 Release · 1966–2025

Yellow-billed Cuckoo In Eastern Tallgrass Prairie

All regionsEastern Tallgrass PrairieForest birds

Yellow-billed Cuckoo in Eastern Tallgrass Prairie has declined: down 33% on the route-weighted index since 1968.

-33%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 →
269Routes 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 Eastern Tallgrass Prairie. See the full index history below.

Yellow-billed Cuckoo In Eastern Tallgrass Prairie Population Forecast

If the recent trend holds, Yellow-billed Cuckoo in Eastern Tallgrass Prairie is projected to rise about 11% by 2030 — from 2.3 in 2025 to a central estimate of 2.6 (95% range 0.41–4.7). A 5-year backtest shows a typical error of ±19.7%, with 100% of held-out values landing inside the 95% band.

+11%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 →
2.6Projected 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 →
0.41–4.795% 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 →
±19.7%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 Eastern Tallgrass Prairie is projected to rise about 11% by 2030 — from 2.3 in 2025 to a central estimate of 2.6 (95% range 0.41–4.7). A 5-year backtest shows a typical error of ±19.7%, 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 →
20262.70.524.9
20272.70.494.8
20282.60.464.8
20292.60.434.8
20302.60.414.7

Routes In Eastern Tallgrass Prairie

Routes recording Yellow-billed Cuckoo in Eastern Tallgrass Prairie.
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 →
BarclayKANSAS292025
Trading PostKANSAS272025
College SpgsIOWA252004
GalesburgKANSAS252025
FilleyMISSOURI192025
ReeceKANSAS172025
KeetonvilleOKLAHOMA172022
HarrisonvilleMISSOURI162025
BucyrusKANSAS142025
RockinghamMISSOURI142025
EllinorKANSAS132025
New PointMISSOURI132025
BelleviewILLINOIS122025
PeoriaOKLAHOMA122023
AthensILLINOIS112025
LincolnvilleKANSAS112024
HumboldtKANSAS102022
OhioMISSOURI102025
KearneyMISSOURI102025
WainwrightOKLAHOMA102013
WrefordKANSAS92024
BedfordIOWA82018
DoverKANSAS82022
SenecaKANSAS82022
MoreheadKANSAS82025

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