BirdAnalyst
Species · Louisiana · BBS 2025 Release · 1966–2024

Yellow-billed Cuckoo Population Trend in Louisiana

All statesGeneralists

Yellow-billed Cuckoo in Louisiana has held roughly steady: up 4% on the route-weighted index since 1969.

+4%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 →
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 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 2029 — from 12 in 2024 to a central estimate of 6.7 (95% range 2.4–11). A 5-year backtest shows a typical error of ±34.8%, with 60% of held-out values landing inside the 95% band.

-43%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 →
6.7Projected 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 →
2.4–1195% 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 →
±34.8%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 2029 — from 12 in 2024 to a central estimate of 6.7 (95% range 2.4–11). A 5-year backtest shows a typical error of ±34.8%, with 60% 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 →
20257.02.711
20266.92.611
20276.82.611
20286.82.511
20296.72.411

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 Nwr3920241987
Ivan 23620162014
Shaw3020241967
Concord2820192006
Mayflower2520241967
Evelyn2420242004
Frogmore2320241998
Fishville 21820242018
Ivan1820131998
Haughton1720241990
Plettenberg1620221968
Norwood1620242004
Rayville 21620242009
Clay1520241968
Ramah1520241988
Burr Ferry1520241987
Enterprise1520242008
Flat Creek1420241998
Natchitoches1419911987
Fort Jessup1420231998
Natchez1420241992
Goodwill1420242004
Bickham1320241984
Longstreet1320241967
Greensburg1320221988

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 2026-05-22.