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

Yellow-throated Vireo Population Trend in South Carolina

All statesForest birds

Yellow-throated Vireo in South Carolina has surged: up 311% on the route-weighted index since 1968.

+311%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 →
48Routes 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-throated 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 →

Yellow-throated Vireo has surged in South Carolina: up 311% on the route-weighted index since 1968.

Yellow-throated Vireo Population Forecast in South Carolina

If the recent trend holds, Yellow-throated Vireo in South Carolina is projected to fall about 39% by 2030 — from 2.5 in 2025 to a central estimate of 1.6 (95% range 0.63–2.5). A 5-year backtest shows a typical error of ±15.5%, with 80% of held-out values landing inside the 95% band.

-39%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 →
1.6Projected 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 →
0.63–2.595% 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-throated Vireo in South Carolina is projected to fall about 39% by 2030 — from 2.5 in 2025 to a central estimate of 1.6 (95% range 0.63–2.5). A 5-year backtest shows a typical error of ±15.5%, 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 →
20261.50.572.4
20271.50.582.4
20281.50.602.4
20291.50.612.5
20301.60.632.5

Yellow-throated Vireo Survey Routes in South Carolina

Routes recording Yellow-throated 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 →
Nixville1520252000
Dale920251998
Adams Run620251988
Coward520251982
Salem Xrd520191982
Sandhills520251995
Greenwood520251998
Little Mtn419861966
Barton Creek420071967
Whitmire420242010
Ridgeway420252010
Hardeeville320251986
Plum Branch320251977
Red Bluff320251997
Boykin Ml Pd219681968
Walterboro220251971
Landrum219921972
Nixonville219901987
Ward220252017
Lowrys220252017
Blacksburg220121998
Olar220191998
Pinewood220081999
Carvers Bay220121998
Battlecreek220022000

Yellow-throated Vireo Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourinebraskanew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsin

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