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

Eastern Whip-poor-will Population Trend in South Carolina

All statesAerial insectivores

Eastern Whip-poor-will in South Carolina has increased: up 46% on the route-weighted index since 1969.

+46%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 →
31Routes 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 Eastern Whip-poor-will 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 Eastern Whip-poor-will in South Carolina. See the full index history below.

Eastern Whip-poor-will Population Forecast in South Carolina

If the recent trend holds, Eastern Whip-poor-will in South Carolina is projected to rise about 19% by 2029 — from 0.48 in 2024 to a central estimate of 0.57 (95% range 0.00–1.3). A 5-year backtest shows a typical error of ±142.2%, with 100% of held-out values landing inside the 95% band.

+19%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 →
0.57Projected 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 →
0.00–1.395% 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 →
±142.2%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, Eastern Whip-poor-will in South Carolina is projected to rise about 19% by 2029 — from 0.48 in 2024 to a central estimate of 0.57 (95% range 0.00–1.3). A 5-year backtest shows a typical error of ±142.2%, 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 →
20250.570.001.3
20260.570.001.3
20270.570.001.3
20280.570.001.3
20290.570.001.3

Eastern Whip-poor-will Survey Routes in South Carolina

Routes recording Eastern Whip-poor-will 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 →
Sandhills720241996
Pinewood620171998
Owings520001998
Dillon420001970
Joanna420061999
Cauthens Xrd420191982
Boiling Spgs319791967
Landrum319921973
Plum Branch320241977
Blacksburg320071998
Owings 2320082006
New Holland220041985
Wagener220091977
Whitmire220222010
Bennettsville220131998
Prosperity220062000
Chesnee220031996
Rome120231984
Coward120051973
Foreston119891989
Salem Xrd120141982
Barton Creek120111968
Nixonville119871987
Ridgeway120122012
Salem120142010

Eastern Whip-poor-will Population Trend in Other States

alabamaarkansasconnecticutdelawaregeorgiaillinoisindianaiowakansaskentuckymainemarylandmassachusettsmichiganminnesotamississippimissourinebraskanew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsin

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