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

Red-shouldered Hawk Population Trend in South Carolina

All statesBirds of prey

Red-shouldered Hawk in South Carolina has surged: up 185% on the route-weighted index since 1968.

+185%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 →
49Routes 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 Red-shouldered Hawk 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 →

Red-shouldered Hawk has surged in South Carolina: up 185% on the route-weighted index since 1968.

Red-shouldered Hawk Population Forecast in South Carolina

If the recent trend holds, Red-shouldered Hawk in South Carolina is projected to fall about 14% by 2030 — from 2.3 in 2025 to a central estimate of 1.9 (95% range 1.3–2.6). A 5-year backtest shows a typical error of ±13.1%, with 100% of held-out values landing inside the 95% band.

-14%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 →
1.9Projected 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 →
1.3–2.695% 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 →
±13.1%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, Red-shouldered Hawk in South Carolina is projected to fall about 14% by 2030 — from 2.3 in 2025 to a central estimate of 1.9 (95% range 1.3–2.6). A 5-year backtest shows a typical error of ±13.1%, 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 →
20261.81.22.5
20271.91.22.5
20281.91.22.5
20291.91.32.6
20301.91.32.6

Red-shouldered Hawk Survey Routes in South Carolina

Routes recording Red-shouldered Hawk 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 →
Battlecreek920251999
Rome720251972
Coward620251984
Nixville620251998
Green Sea520252019
Olar520191998
Foreston420211966
Dillon420211992
Lowrys420252017
Kiawah Island420242000
Anderson420181981
Hardeeville320251967
Walterboro320171972
Owings319921992
Campobello320252012
Sandhills320241994
Dale320252001
Adams Run320251989
Owings 2320252005
Jamestown220191968
Holly Hill220251980
Bishopville220251986
Boykin Ml Pd219671966
Salem Xrd220191983
Boiling Spgs219671967

Red-shouldered Hawk Population Trend in Other States

alabamaarkansascaliforniaconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourinebraskanew-hampshirenew-jerseynew-yorknorth-carolinaohiooklahomaoregonpennsylvaniarhode-islandtennesseetexasvermontvirginiawashingtonwest-virginiawisconsin

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