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

Song Sparrow Population Trend in South Carolina

All statesGeneralists

Song Sparrow in South Carolina has edged up: up 12% on the route-weighted index since 1969.

+12%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 →
17Routes 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 →
54YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Song Sparrow 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 →

No notable trend signals for Song Sparrow in South Carolina. See the full index history below.

Song Sparrow Population Forecast in South Carolina

If the recent trend holds, Song Sparrow in South Carolina is projected to fall about 54% by 2029 — from 0.57 in 2024 to a central estimate of 0.26 (95% range 0.00–0.92). A 5-year backtest shows a typical error of ±36.3%, with 100% of held-out values landing inside the 95% band.

-54%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 →
0.26Projected 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 →
0.00–0.9295% 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 →
±36.3%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, Song Sparrow in South Carolina is projected to fall about 54% by 2029 — from 0.57 in 2024 to a central estimate of 0.26 (95% range 0.00–0.92). A 5-year backtest shows a typical error of ±36.3%, with 100% 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 →
20250.280.000.94
20260.280.000.93
20270.270.000.93
20280.270.000.92
20290.260.000.92

Song Sparrow Survey Routes in South Carolina

Routes recording Song Sparrow 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 →
Pendleton1019761975
Campobello720242010
Landrum619921972
Salem520242010
Hardeeville319721972
Prosperity320112011
Bishopville219921992
Little Mtn219801980
Boiling Spgs219761969
Blacksburg220111999
Anderson220171977
New Holland119761976
Barton Creek120141967
Plum Branch119951993
Joanna120182018
Chesnee120141992
Battlecreek120222000

Song Sparrow Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawaregeorgiaidahoillinoisindianaiowakansaskentuckymainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooregonpennsylvaniarhode-islandsouth-dakotatennesseeutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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