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

Hairy Woodpecker Population Trend in South Carolina

All statesForest birds

Hairy Woodpecker in South Carolina has collapsed: down 85% on the route-weighted index since 1968.

-85%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 →
39Routes 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 Hairy Woodpecker 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 →

Hairy Woodpecker has collapsed in South Carolina: down 85% on the route-weighted index since 1968.

Hairy Woodpecker Population Forecast in South Carolina

If the recent trend holds, Hairy Woodpecker in South Carolina is projected to stay roughly flat through 2029, near 0.16 (95% range 0.00–0.53). A 5-year backtest shows a typical error of ±275.6%, with 100% of held-out values landing inside the 95% band.

n/aChange 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 →
0.16Projected 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 →
0.00–0.5395% 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 →
±275.6%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, Hairy Woodpecker in South Carolina is projected to stay roughly flat through 2029, near 0.16 (95% range 0.00–0.53). A 5-year backtest shows a typical error of ±275.6%, 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 →
20250.180.000.55
20260.180.000.55
20270.170.000.54
20280.160.000.53
20290.160.000.53

Hairy Woodpecker Survey Routes in South Carolina

Routes recording Hairy Woodpecker 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 →
Cauthens Xrd320211994
Prosperity320111997
Foreston220091971
Salem220142012
Blacksburg220121999
Bennettsville220172001
Adams Run220112009
Johns Isle119741967
Jamestown120091967
Hardeeville120081967
Rome120101967
Holly Hill120101974
Coward120231966
New Holland119901973
Wagener120221980
Dillon120141970
Bishopville120091970
Sandhills119971997
Walterboro119971975
Little Mtn119831977
Salem Xrd120171982
Owings120041992
Barton Creek120141978
Boiling Spgs119791979
Landrum119921986

Hairy Woodpecker Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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