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

White-eyed Vireo Population Trend in South Carolina

All statesForest birds

White-eyed Vireo in South Carolina has surged: up 145% on the route-weighted index since 1968.

+145%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 →
51Routes 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 White-eyed Vireo Trends in South CarolinaNotable 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 →

White-eyed Vireo has surged in South Carolina: up 145% on the route-weighted index since 1968.

White-eyed Vireo Population Forecast in South Carolina

If the recent trend holds, White-eyed Vireo in South Carolina is projected to stay roughly flat through 2030, near 11 (95% range 7.7–14). A 5-year backtest shows a typical error of ±11.9%, with 100% of held-out values landing inside the 95% band.

-9%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 →
11Projected 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 →
7.7–1495% 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 →
±11.9%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, White-eyed Vireo in South Carolina is projected to stay roughly flat through 2030, near 11 (95% range 7.7–14). A 5-year backtest shows a typical error of ±11.9%, 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 →
2026107.413
2027107.513
2028117.614
2029117.614
2030117.714

White-eyed Vireo Survey Routes in South Carolina

Routes recording White-eyed Vireo in South 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 →
Adams Run3320251988
Coward3220251966
Carvers Bay2520121998
Greenwood2020251998
Mount Pisgah2020251998
Nixville2020251998
Dale1920251998
Hardeeville1620251967
Plum Branch1620251977
Whitmire1620242010
Owings 21620252006
Bennettsville1420171998
Wagener1320251966
Holly Hill1220251972
Walterboro1220251970
Olar1220191998
Cauthens Xrd1220211982
Barton Creek1120221967
New Ellenton1120252010
Kingstree1120102010
Salem Xrd1020171982
Ward1020252017
Green Sea1020252010
Joanna1020251999
Dillon920211970

White-eyed Vireo Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganmississippimissourinebraskanew-jerseynew-yorknorth-carolinaohiooklahomapennsylvaniarhode-islandtennesseetexasvirginiawest-virginiawisconsin

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