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

Red-eyed Vireo Population Trend in South Carolina

All statesForest birds

Red-eyed Vireo in South Carolina has edged up: up 17% on the route-weighted index since 1968.

+17%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 Red-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 →

No notable trend signals for Red-eyed Vireo in South Carolina. See the full index history below.

Red-eyed Vireo Population Forecast in South Carolina

If the recent trend holds, Red-eyed Vireo in South Carolina is projected to stay roughly flat through 2030, near 9.4 (95% range 5.8–13). A 5-year backtest shows a typical error of ±32.1%, with 80% of held-out values landing inside the 95% band.

+3%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 →
9.4Projected 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 →
5.8–1395% 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 →
±32.1%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, Red-eyed Vireo in South Carolina is projected to stay roughly flat through 2030, near 9.4 (95% range 5.8–13). A 5-year backtest shows a typical error of ±32.1%, with 80% 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 →
20269.25.613
20279.25.613
20289.35.713
20299.35.713
20309.45.813

Red-eyed Vireo Survey Routes in South Carolina

Routes recording Red-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 →
Battlecreek3720251999
Greenwood2920251998
Cauthens Xrd2620211982
Salem2220252010
Campobello2120252010
Ridgeway1920252010
Whitmire1720242010
Sandhills1720251994
Salem Xrd1620191982
Barton Creek1620221967
Mount Pisgah1620251998
Landrum1419921972
Plum Branch1220251977
Lowrys1120252017
Olar1120191998
Joanna1020251999
Coward820251966
Wagener820251966
Adams Run720251988
Prosperity620241994
Holly Hill520251972
New Holland520251967
Ward520252017
Dale520251998
Owings 2520252005

Red-eyed Vireo Population Trend in Other States

alabamaalaskaarkansascoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-dakotatennesseetexasvermontvirginiawashingtonwest-virginiawisconsinwyoming

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