BirdAnalyst
Species · BCR 19 · BBS 2025 Release · 1966–2024

Yellow-billed Cuckoo In Central Mixed Grass Prairie

All regionsCentral Mixed Grass PrairieGeneralists

Yellow-billed Cuckoo in Central Mixed Grass Prairie has edged down: down 19% on the route-weighted index since 1969.

-19%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 →
120Routes 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 →
57YearsYears 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 Central Mixed Grass Prairie. See the full index history below.

Yellow-billed Cuckoo In Central Mixed Grass Prairie Population Forecast

If the recent trend holds, Yellow-billed Cuckoo in Central Mixed Grass Prairie is projected to rise about 38% by 2029 — from 2.4 in 2024 to a central estimate of 3.3 (95% range 1.4–5.2). A 5-year backtest shows a typical error of ±13.4%, with 100% of held-out values landing inside the 95% band.

+38%Change by 2029TrendPercent 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 →
3.3Projected 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
1.4–5.295% 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 →
±13.4%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 Central Mixed Grass Prairie is projected to rise about 38% by 2029 — from 2.4 in 2024 to a central estimate of 3.3 (95% range 1.4–5.2). A 5-year backtest shows a typical error of ±13.4%, with 100% of held-out values landing inside the 95% band.19672029
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 →
20253.41.55.2
20263.31.45.2
20273.31.45.2
20283.31.45.2
20293.31.45.2

Routes In Central Mixed Grass Prairie

Routes recording Yellow-billed Cuckoo in Central Mixed Grass 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 →
Ft Sill WestOKLAHOMA411994
Wichita MtnsOKLAHOMA231994
Ft Sill EastOKLAHOMA211994
Wichita Mtns EastOKLAHOMA192022
WellingtonKANSAS162024
PhrosoOKLAHOMA152024
ChapmanKANSAS131981
ShieldsTEXAS132001
KanopolisKANSAS122024
Liberty 2NEBRASKA122007
BuckeyeKANSAS112023
BerwetKANSAS112024
ColonyOKLAHOMA111995
Pear ValleyTEXAS112024
ArapahoOKLAHOMA102014
CovertKANSAS92024
HopewellKANSAS92014
WeinertTEXAS91994
JewellKANSAS82005
SolomonKANSAS82019
GrimesOKLAHOMA82024
DouglasOKLAHOMA82022
HunterOKLAHOMA72024
Shields 2TEXAS72023
HollenbergKANSAS62023

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.