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Species · Georgia · BBS 2026 Release · 1966–2025

Cliff Swallow Population Trend in Georgia

All statesAerial insectivores

Cliff Swallow in Georgia has surged: up 16× on the route-weighted index since 1991.

16×Since 1991TrendPercent 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 →
36Routes 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 →
36YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Cliff Swallow Trends in GeorgiaNotable 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 →

Cliff Swallow has surged in Georgia: up 16× on the route-weighted index since 1991.

Cliff Swallow Population Forecast in Georgia

If the recent trend holds, Cliff Swallow in Georgia is projected to rise about 103% by 2030 — from 2.6 in 2025 to a central estimate of 5.3 (95% range 3.0–7.6). A 5-year backtest shows a typical error of ±33.4%, with 80% of held-out values landing inside the 95% band.

+103%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 →
5.3Projected 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 →
3.0–7.695% 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 →
±33.4%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, Cliff Swallow in Georgia is projected to rise about 103% by 2030 — from 2.6 in 2025 to a central estimate of 5.3 (95% range 3.0–7.6). A 5-year backtest shows a typical error of ±33.4%, with 80% of held-out values landing inside the 95% band.19882030
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 →
20264.72.47.0
20274.92.57.2
20285.02.77.3
20295.12.87.5
20305.33.07.6

Cliff Swallow Survey Routes in Georgia

Routes recording Cliff Swallow in Georgia.
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 →
Doles10520192009
Cartersville9320251994
Siloam3020241990
Hebron3020212005
Linwood2520232017
Pleasant Hill1820252013
Newton1620162016
Baxter1520222009
Minter Tweed1520252023
Curry Hill1320172006
Woodstock1320212021
Whitesburg1320252013
Lakeview1220242022
Rock Branch1220252022
Juliette720162007
Crest620222014
Amos Mill620222018
Davis Crossroads620252015
Washington520252004
Sharon520182018
Athens420252025
Owensboro420252025
Shannon320192009
Rutledge320172017
Millen320242024

Cliff Swallow Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniasouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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