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

Wood Thrush Population Trend in South Carolina

All statesForest birds

Wood Thrush in South Carolina has collapsed: down 82% on the route-weighted index since 1968.

-82%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 →
47Routes 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 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 82% 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 2029 — from 2.9 in 2024 to a central estimate of 0.00 (95% range 0.00–5.2). A 5-year backtest shows a typical error of ±164.2%, with 80% of held-out values landing inside the 95% band.

-100%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 →
0.00Projected 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 →
0.00–5.295% 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 →
±164.2%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 2029 — from 2.9 in 2024 to a central estimate of 0.00 (95% range 0.00–5.2). A 5-year backtest shows a typical error of ±164.2%, with 80% 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 →
20250.000.005.2
20260.000.005.2
20270.000.005.2
20280.000.005.2
20290.000.005.2

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 →
Whitmire1720242010
Little Mtn1519881966
Pendleton1119761966
Boykin Ml Pd1019681966
Lowrys920212017
Plum Branch820241977
Battlecreek820241999
Barton Creek720221967
Salem720242010
Greenwood720191998
Prosperity720241992
Nixonville619951987
Cauthens Xrd620211982
Salem Xrd520191982
Boiling Spgs419791967
Sandhills420021994
Johns Isle319791967
Rome320241967
Wagener320241966
Walterboro320171970
Owings320041992
Landrum319921972
Campobello320222010
Carvers Bay320121998
Holly Hill220241972

Wood Thrush Population Trend in Other States

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

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