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Species · Kansas · BBS 2026 Release · 1966–2025

Yellow-billed Cuckoo Population Trend in Kansas

All statesForest birds

Yellow-billed Cuckoo in Kansas has edged up: up 13% on the route-weighted index since 1969.

+13%Since 1969TrendPercent 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 →
63Routes In StateSurvey 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 Yellow-billed Cuckoo Trends in KansasNotable 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 Kansas. See the full index history below.

Yellow-billed Cuckoo Population Forecast in Kansas

If the recent trend holds, Yellow-billed Cuckoo in Kansas is projected to fall about 25% by 2030 — from 9.3 in 2025 to a central estimate of 6.9 (95% range 2.9–11). A 5-year backtest shows a typical error of ±15.6%, with 100% of held-out values landing inside the 95% band.

-25%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 →
6.9Projected 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 →
2.9–1195% 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 →
±15.6%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 Kansas is projected to fall about 25% by 2030 — from 9.3 in 2025 to a central estimate of 6.9 (95% range 2.9–11). A 5-year backtest shows a typical error of ±15.6%, with 100% of held-out values landing inside the 95% band.19672030
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 →
20267.02.911
20277.02.911
20287.02.911
20296.92.911
20306.92.911

Yellow-billed Cuckoo Survey Routes in Kansas

Routes recording Yellow-billed Cuckoo in Kansas.
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 →
Barclay2920251967
Trading Post2720252000
Galesburg2520251967
Kanopolis1920251968
Reece1720252000
Wellington1620251968
Dalton1420251968
Bucyrus1420252022
Goessel1420252000
Ellinor1320251967
Chapman1319811967
Buckeye1120231967
Berwet1120252000
Lincolnville1120242002
Humboldt1020221968
Covert1020251967
Wreford920241967
Hopewell920142000
Dover820221967
Seneca820221967
Jewell820051967
Morehead820252000
Melrose720231967
Thrall719701967
Grantville720221967

Yellow-billed Cuckoo Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawest-virginiawisconsinwyoming

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