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Species · South Carolina · BBS 2025 Release · 1966–2024

White-eyed Vireo Population Trend in South Carolina

All statesForest birds

White-eyed Vireo in South Carolina has surged: up 143% on the route-weighted index since 1968.

+143%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 →
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 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 143% 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 rise about 13% by 2029 — from 9.3 in 2024 to a central estimate of 11 (95% range 7.5–14). A 5-year backtest shows a typical error of ±9.5%, 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 →
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 →
7.5–1495% 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 →
±9.5%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, White-eyed Vireo in South Carolina is projected to rise about 13% by 2029 — from 9.3 in 2024 to a central estimate of 11 (95% range 7.5–14). A 5-year backtest shows a typical error of ±9.5%, 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 →
2025107.213
2026107.313
2027107.313
2028107.413
2029117.514

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 Run3120241988
Carvers Bay2520121998
Walterboro2420171970
Dale2420241998
Whitmire1620242010
Hardeeville1520241967
Sandhills1520241995
Bennettsville1420171998
Nixville1320211998
Plum Branch1220241977
Olar1220191998
Cauthens Xrd1220211982
Barton Creek1120221967
New Ellenton1120242010
Kingstree1120102010
Joanna1120231999
Mount Pisgah1120211998
Salem Xrd1020171982
Holly Hill920241972
Dillon920211970
Green Sea920242010
Rome820241967
New Holland720241967
Pinewood720171998
Owings 2720242006

White-eyed Vireo Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganmississippimissourinebraskanew-jerseynew-yorknorth-carolinaohiooklahomapennsylvaniarhode-islandtennesseetexasvirginiawest-virginiawisconsin

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