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Species · Louisiana · BBS 2026 Release · 1966–2025

Yellow-billed Cuckoo Population Trend in Louisiana

All statesForest birds

Yellow-billed Cuckoo in Louisiana has edged up: up 18% on the route-weighted index since 1969.

+18%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 →
99Routes 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 LouisianaNotable 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 Louisiana. See the full index history below.

Yellow-billed Cuckoo Population Forecast in Louisiana

If the recent trend holds, Yellow-billed Cuckoo in Louisiana is projected to fall about 43% by 2030 — from 12 in 2025 to a central estimate of 7.0 (95% range 2.6–11). A 5-year backtest shows a typical error of ±36.8%, with 40% of held-out values landing inside the 95% band.

-43%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 →
7.0Projected 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 →
2.6–1195% 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 →
±36.8%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 Louisiana is projected to fall about 43% by 2030 — from 12 in 2025 to a central estimate of 7.0 (95% range 2.6–11). A 5-year backtest shows a typical error of ±36.8%, with 40% 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 →
20267.32.812
20277.22.812
20287.22.712
20297.12.712
20307.02.611

Yellow-billed Cuckoo Survey Routes in Louisiana

Routes recording Yellow-billed Cuckoo in Louisiana.
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 →
Tensas Nwr4220251987
Ramah4120251988
Frogmore3720251998
Atchafalaya3120251989
Shaw3020241967
Mayflower2820251967
Concord2820192006
Enterprise2620252008
Evelyn2420242004
Ivan1820131998
Burr Ferry1720251987
Natchez1720251992
Plettenberg1620221968
Norwood1520252004
Transylvania1520251998
Flat Creek1420251998
Derry 21420251990
Natchitoches1419911987
Rayville 21420252009
Fort Jessup1420231998
Ivan 21420252014
Clay1320251968
Greensburg1320221988
Mount Union1220251998
River Road1220251987

Yellow-billed Cuckoo Population Trend in Other States

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

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