BirdAnalyst
Species · BCR 26 · BBS 2025 Release · 1966–2024

Yellow-billed Cuckoo In Mississippi Alluvial Valley

All regionsMississippi Alluvial ValleyGeneralists

Yellow-billed Cuckoo in Mississippi Alluvial Valley has edged up: up 16% on the route-weighted index since 1968.

+16%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 →
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 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.

Forecast

If the recent trend holds, Yellow-billed Cuckoo in Mississippi Alluvial Valley is projected to fall about 13% by 2029 — from 11 in 2024 to a central estimate of 9.9 (95% range 4.6–15). A 5-year backtest shows a typical error of ±8.4%, with 100% of held-out values landing inside the 95% band.

-13%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 →
9.9Projected 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 →
4.6–1595% 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 →
±8.4%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 13% by 2029 — from 11 in 2024 to a central estimate of 9.9 (95% range 4.6–15). A 5-year backtest shows a typical error of ±8.4%, with 100% of held-out values landing inside the 95% band.19662029
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 →
2025104.815
2026104.715
2027104.715
202810.04.615
20299.94.615

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 NwrLOUISIANA392024
South BendARKANSAS342023
TallahatchieMISSISSIPPI332024
Eagle LakeMISSISSIPPI322024
ShawLOUISIANA302024
ConcordLOUISIANA282019
KelsoARKANSAS252016
MayflowerLOUISIANA252024
DundeeMISSISSIPPI242022
FrogmoreLOUISIANA232024
CommerceMISSISSIPPI201993
Delta N.F.MISSISSIPPI202021
MaynardARKANSAS172024
Crowley'S RidgeARKANSAS172024
Panther Swamp NwrMISSISSIPPI172018
HughesARKANSAS162023
Rayville 2LOUISIANA162024
IsolaMISSISSIPPI162022
WintervilleMISSISSIPPI162011
SaffellARKANSAS152019
RamahLOUISIANA152024
TchulaMISSISSIPPI151975
EudoraARKANSAS142024
TippoMISSISSIPPI142024
Dahomey NwrMISSISSIPPI142024

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