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

American Robin Population Trend in South Carolina

All statesForest birds

American Robin in South Carolina has held roughly steady: down 1% on the route-weighted index since 1968.

-1%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 →
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 American Robin 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 American Robin in South Carolina. See the full index history below.

American Robin Population Forecast in South Carolina

If the recent trend holds, American Robin in South Carolina is projected to stay roughly flat through 2030, near 5.4 (95% range 1.3–9.5). A 5-year backtest shows a typical error of ±78.1%, with 100% of held-out values landing inside the 95% band.

-1%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 →
5.4Projected 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 →
1.3–9.595% 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 →
±78.1%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, American Robin in South Carolina is projected to stay roughly flat through 2030, near 5.4 (95% range 1.3–9.5). A 5-year backtest shows a typical error of ±78.1%, with 100% 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 →
20265.51.49.6
20275.51.49.6
20285.41.39.5
20295.41.39.5
20305.41.39.5

American Robin Survey Routes in South Carolina

Routes recording American Robin 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 →
Pendleton5319761966
Landrum4119921972
Chesnee3320151992
Bishopville3020251970
Anderson2720181977
Blacksburg2420131998
Little Mtn2219881966
Boiling Spgs2219791967
Owings 21820252005
Ward1520252017
Mount Pisgah1420251998
Campobello1220252010
Ridgeway1220252010
Owings920041992
Salem Xrd820191982
Coward720251968
Barton Creek720221967
New Ellenton720252010
Salem620252010
Joanna620251999
Boykin Ml Pd519681966
Greenwood520251998
Prosperity520241992
Foreston420251971
Dillon420211970

American Robin Population Trend in Other States

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

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