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Species · Mississippi · BBS 2025 Release · 1966–2024

Yellow-billed Cuckoo Population Trend in Mississippi

All statesGeneralists

Yellow-billed Cuckoo in Mississippi has surged: up 109% on the route-weighted index since 1968.

+109%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 →
74Routes 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 MississippiNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

long arc increasecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Yellow-billed Cuckoo has surged in Mississippi: up 109% on the route-weighted index since 1968.

Yellow-billed Cuckoo Population Forecast in Mississippi

If the recent trend holds, Yellow-billed Cuckoo in Mississippi is projected to fall about 14% by 2029 — from 13 in 2024 to a central estimate of 11 (95% range 5.3–17). A 5-year backtest shows a typical error of ±15.5%, with 100% of held-out values landing inside the 95% band.

-14%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 →
11Projected 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 →
5.3–1795% 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 →
±15.5%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 is projected to fall about 14% by 2029 — from 13 in 2024 to a central estimate of 11 (95% range 5.3–17). A 5-year backtest shows a typical error of ±15.5%, 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 →
2025115.317
2026115.317
2027115.317
2028115.317
2029115.317

Yellow-billed Cuckoo Survey Routes in Mississippi

Routes recording Yellow-billed Cuckoo in Mississippi.
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 →
Trace Lorman3620192016
Tallahatchie3320241996
Eagle Lake3220242012
Trace Central2620222007
Trace North2620182008
Dundee2420221970
Fort Adams2220221975
Trace South2120192007
Commerce2019931966
Forest2020241972
Delta N.F.2020211995
Star2020242016
Scooba1819821967
Mt Carmel1720161974
Panther Swamp Nwr1720182016
Isola1620221968
Winterville1620112009
Tchula1519751970
Benton1520241972
Trace Choctaw1520192012
Walthall1419871970
Columbia1420181969
Dahomey Nwr1420242011
Tippo1420241996
Embry1420241988

Yellow-billed Cuckoo Population Trend in Other States

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

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