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

Yellow-throated Vireo Population Trend in South Carolina

All statesForest birds

Yellow-throated Vireo in South Carolina has surged: up 208% on the route-weighted index since 1968.

+208%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 →
57YearsYears 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 208% 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 rise about 17% by 2029 — from 1.2 in 2024 to a central estimate of 1.4 (95% range 0.56–2.3). A 5-year backtest shows a typical error of ±17.4%, with 100% of held-out values landing inside the 95% band.

+17%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 →
1.4Projected 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 →
0.56–2.395% 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 →
±17.4%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 rise about 17% by 2029 — from 1.2 in 2024 to a central estimate of 1.4 (95% range 0.56–2.3). A 5-year backtest shows a typical error of ±17.4%, 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 →
20251.40.512.3
20261.40.532.3
20271.40.542.3
20281.40.552.3
20291.40.562.3

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 →
Salem Xrd520191982
Little Mtn419861966
Barton Creek420071967
Whitmire420242010
Dale420241998
New Holland320221967
Plum Branch320241977
Sandhills320241995
Adams Run320241988
Owings 2320232013
Hardeeville220241986
Boykin Ml Pd219681968
Walterboro220171971
Landrum219921972
Nixonville219901987
Salem220242021
Blacksburg220121998
Joanna220231999
Olar220191998
Pinewood220081999
Carvers Bay220121998
Battlecreek220022000
Anderson219881988
Jamestown120051986
Rome120241989

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 2026-05-22.