BirdAnalyst
Species · BCR 37 · BBS 2025 Release · 1966–2024

Yellow-billed Cuckoo In Gulf Coastal Prairie

All regionsGulf Coastal PrairieGeneralists

Yellow-billed Cuckoo in Gulf Coastal Prairie has edged down: down 21% on the route-weighted index since 1969.

-21%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 →
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 Gulf Coastal Prairie. See the full index history below.

Forecast

If the recent trend holds, Yellow-billed Cuckoo in Gulf Coastal Prairie is projected to fall about 35% by 2029 — from 6.0 in 2024 to a central estimate of 3.9 (95% range 1.3–6.5). A 5-year backtest shows a typical error of ±28.1%, with 100% of held-out values landing inside the 95% band.

-35%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 →
3.9Projected 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 →
1.3–6.595% 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 →
±28.1%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 Gulf Coastal Prairie is projected to fall about 35% by 2029 — from 6.0 in 2024 to a central estimate of 3.9 (95% range 1.3–6.5). A 5-year backtest shows a typical error of ±28.1%, 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 →
20254.01.36.6
20263.91.36.6
20273.91.36.5
20283.91.36.5
20293.91.36.5

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
Goliad PrairieTEXAS152016
Hackberry 2LOUISIANA132024
Loyola Beach 2TEXAS132024
ChinquapinTEXAS112024
L. Atascosa NwrTEXAS112023
Ltl ChenierLOUISIANA102024
Vinton 2LOUISIANA102024
MamouLOUISIANA91982
KatyTEXAS92024
Moon LakeTEXAS92011
Port AcresTEXAS82024
VintonLOUISIANA72009
Rock IslandTEXAS72024
San PedroTEXAS72023
Moon Lake 2TEXAS72024
GlencoeLOUISIANA62017
MauriceLOUISIANA62024
RichardLOUISIANA62024
WinnieTEXAS62024
Loyola BeachTEXAS62009
KaplanLOUISIANA52023
Ville PlatteLOUISIANA52019
VanderbiltTEXAS51976
EstherLOUISIANA42024

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