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Species · BCR 26 · BBS 2026 Release · 1966–2025

Yellow-billed Cuckoo In Mississippi Alluvial Valley

All regionsMississippi Alluvial ValleyForest birds

Yellow-billed Cuckoo in Mississippi Alluvial Valley has increased: up 30% on the route-weighted index since 1968.

+30%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 →
73Routes 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 →
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 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 Mississippi Alluvial Valley. See the full index history below.

Yellow-billed Cuckoo In Mississippi Alluvial Valley Population Forecast

If the recent trend holds, Yellow-billed Cuckoo in Mississippi Alluvial Valley is projected to fall about 25% by 2030 — from 14 in 2025 to a central estimate of 10 (95% range 4.8–15). A 5-year backtest shows a typical error of ±13.5%, 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 →
10Projected 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 →
4.8–1595% 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 →
±13.5%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 Mississippi Alluvial Valley is projected to fall about 25% by 2030 — from 14 in 2025 to a central estimate of 10 (95% range 4.8–15). A 5-year backtest shows a typical error of ±13.5%, 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 →
2026104.916
2027104.916
2028104.916
2029104.816
2030104.815

Routes In Mississippi Alluvial Valley

Routes recording Yellow-billed Cuckoo in Mississippi Alluvial Valley.
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 NwrLOUISIANA422025
RamahLOUISIANA412025
FrogmoreLOUISIANA372025
South BendARKANSAS332025
AtchafalayaLOUISIANA312025
ShawLOUISIANA302024
Dahomey NwrMISSISSIPPI292025
MayflowerLOUISIANA282025
ConcordLOUISIANA282019
KelsoARKANSAS252016
TallahatchieMISSISSIPPI252025
DundeeMISSISSIPPI242022
Eagle LakeMISSISSIPPI242025
CommerceMISSISSIPPI201993
Delta N.F.MISSISSIPPI202021
Panther Swamp NwrMISSISSIPPI172018
IsolaMISSISSIPPI162022
WintervilleMISSISSIPPI162011
TippoMISSISSIPPI162025
SaffellARKANSAS152019
TransylvaniaLOUISIANA152025
TchulaMISSISSIPPI151975
HughesARKANSAS142025
Crowley'S RidgeARKANSAS142025
Rayville 2LOUISIANA142025

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