BirdAnalyst
Species · BCR 37 · BBS 2026 Release · 1966–2025

Yellow-billed Cuckoo In Gulf Coastal Prairie

All regionsGulf Coastal PrairieForest birds

Yellow-billed Cuckoo in Gulf Coastal Prairie has held roughly steady: down 10% on the route-weighted index since 1969.

-10%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 →
46Routes 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 →
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 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 Gulf Coastal Prairie. See the full index history below.

Yellow-billed Cuckoo In Gulf Coastal Prairie Population Forecast

If the recent trend holds, Yellow-billed Cuckoo in Gulf Coastal Prairie is projected to fall about 25% by 2030 — from 5.3 in 2025 to a central estimate of 4.0 (95% range 1.3–6.6). A 5-year backtest shows a typical error of ±29%, 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 →
4.0Projected 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 →
1.3–6.695% 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 →
±29%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 Gulf Coastal Prairie is projected to fall about 25% by 2030 — from 5.3 in 2025 to a central estimate of 4.0 (95% range 1.3–6.6). A 5-year backtest shows a typical error of ±29%, 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 →
20264.01.46.6
20274.01.46.6
20284.01.46.6
20294.01.46.6
20304.01.36.6

Routes In Gulf Coastal Prairie

Routes recording Yellow-billed Cuckoo in Gulf Coastal 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 →
McfaddinTEXAS232016
Loyola Beach 2TEXAS192025
Goliad PrairieTEXAS152016
Vinton 2LOUISIANA122025
MamouLOUISIANA91982
Moon LakeTEXAS92011
L. Atascosa NwrTEXAS92025
Forked IslandLOUISIANA82025
Hackberry 2LOUISIANA72025
VintonLOUISIANA72009
Rock IslandTEXAS72025
GlencoeLOUISIANA62017
MauriceLOUISIANA62024
Loyola BeachTEXAS62009
KaplanLOUISIANA52023
RichardLOUISIANA52025
Ville PlatteLOUISIANA52019
Hinkles FerTEXAS52025
VanderbiltTEXAS51976
KatyTEXAS52025
Moon Lake 2TEXAS52025
Bayside 3TEXAS52025
EstherLOUISIANA42025
Ltl ChenierLOUISIANA42025
Port AcresTEXAS42025

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