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Species · North Carolina · BBS 2026 Release · 1966–2025

Yellow-billed Cuckoo Population Trend in North Carolina

All statesForest birds

Yellow-billed Cuckoo in North Carolina has held roughly steady: down 9% on the route-weighted index since 1968.

-9%Since 1968TrendPercent 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 →
106Routes 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 →
59YearsYears 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 North CarolinaNotable 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 North Carolina. See the full index history below.

Yellow-billed Cuckoo Population Forecast in North Carolina

If the recent trend holds, Yellow-billed Cuckoo in North Carolina is projected to stay roughly flat through 2030, near 3.9 (95% range 0.65–7.1). A 5-year backtest shows a typical error of ±56.5%, with 100% of held-out values landing inside the 95% band.

-5%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 →
3.9Projected 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 →
0.65–7.195% 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 →
±56.5%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 North Carolina is projected to stay roughly flat through 2030, near 3.9 (95% range 0.65–7.1). A 5-year backtest shows a typical error of ±56.5%, with 100% of held-out values landing inside the 95% band.19662030
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 →
20264.00.787.2
20274.00.747.2
20283.90.717.2
20293.90.687.1
20303.90.657.1

Yellow-billed Cuckoo Survey Routes in North Carolina

Routes recording Yellow-billed Cuckoo in North Carolina.
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 →
Broad Creek2120251993
Milltail Cr1720251992
Sheep Ridge1720251994
Durham1420251990
Supply1220251992
Dortches1220251990
Beargrass1119811966
Speed1120251966
Bullock1120251997
Green Swamp1020062002
Mashoes919821971
Oakboro920251969
Cypress Cr920221990
Montague920251990
Roseboro920251995
Rheasville920172005
Goldston920222001
Ernul920092001
Gupton820252001
Arapahoe719951966
Reelsboro720191997
Jamesville720251983
Cayton720242010
Shallotte619911967
Youngsville620251966

Yellow-billed Cuckoo Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawest-virginiawisconsinwyoming

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