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

Wood Thrush Population Trend in South Carolina

All statesForest birds

Wood Thrush in South Carolina has collapsed: down 79% on the route-weighted index since 1968.

-79%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 →
49Routes 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 Wood Thrush 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 declinecomputed 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 →

Wood Thrush has collapsed in South Carolina: down 79% on the route-weighted index since 1968.

Wood Thrush Population Forecast in South Carolina

If the recent trend holds, Wood Thrush in South Carolina is projected to fall about 100% by 2030 — from 4.2 in 2025 to a central estimate of 0.00 (95% range 0.00–5.4). A 5-year backtest shows a typical error of ±163.7%, with 80% of held-out values landing inside the 95% band.

-100%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 →
0.00Projected 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 →
0.00–5.495% 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 →
±163.7%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, Wood Thrush in South Carolina is projected to fall about 100% by 2030 — from 4.2 in 2025 to a central estimate of 0.00 (95% range 0.00–5.4). A 5-year backtest shows a typical error of ±163.7%, 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 →
20260.000.005.4
20270.000.005.4
20280.000.005.4
20290.000.005.4
20300.000.005.4

Wood Thrush Survey Routes in South Carolina

Routes recording Wood Thrush 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 →
Coward1820251966
Plum Branch1720251977
Whitmire1720242010
Little Mtn1519881966
Battlecreek1520251999
Greenwood1420251998
Pendleton1119761966
Boykin Ml Pd1019681966
Mount Pisgah1020251998
Lowrys820252017
Ridgeway820252010
Barton Creek720221967
Prosperity720241992
Nixonville619951987
Salem620252010
Cauthens Xrd620211982
Salem Xrd520191982
Owings 2520252006
Boiling Spgs419791967
Campobello420252010
Joanna420251999
Johns Isle319791967
Rome320241967
Walterboro320171970
Owings320041992

Wood Thrush Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourinebraskanew-hampshirenew-jerseynew-yorknorth-carolinaohiooklahomapennsylvaniarhode-islandsouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsin

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