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

White-breasted Nuthatch Population Trend in South Carolina

All statesForest birds

White-breasted Nuthatch in South Carolina has surged: up 353% on the route-weighted index since 1969.

+353%Since 1969TrendPercent 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 →
56YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable White-breasted Nuthatch 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 →

White-breasted Nuthatch has surged in South Carolina: up 353% on the route-weighted index since 1969.

White-breasted Nuthatch Population Forecast in South Carolina

If the recent trend holds, White-breasted Nuthatch in South Carolina is projected to stay roughly flat through 2029, near 1.6 (95% range 0.92–2.3). A 5-year backtest shows a typical error of ±33.1%, with 80% of held-out values landing inside the 95% band.

+7%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 →
1.6Projected 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 →
0.92–2.395% 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 →
±33.1%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, White-breasted Nuthatch in South Carolina is projected to stay roughly flat through 2029, near 1.6 (95% range 0.92–2.3). A 5-year backtest shows a typical error of ±33.1%, with 80% of held-out values landing inside the 95% band.19672029
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 →
20251.50.822.2
20261.60.842.3
20271.60.872.3
20281.60.892.3
20291.60.922.3

White-breasted Nuthatch Survey Routes in South Carolina

Routes recording White-breasted Nuthatch 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 →
Adams Run920241988
Barton Creek820221969
Battlecreek720241999
Walterboro520171979
Whitmire420242010
Dale420241998
Prosperity320222015
Jamestown220151967
Dillon219961996
Sandhills220242010
Plum Branch219881988
Lowrys220212021
Salem220242010
Mount Pisgah219991999
Anderson220182001
Hardeeville120241970
Rome120111981
Holly Hill120101987
Coward119891979
Foreston119801980
New Holland120241970
Wagener120231978
Bishopville119831983
Little Mtn119881984
Owings120002000

White-breasted Nuthatch Population Trend in Other States

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

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