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Species · Georgia · BBS 2026 Release · 1966–2025

Purple Martin Population Trend in Georgia

All statesAerial insectivores

Purple Martin in Georgia has edged down: down 23% on the route-weighted index since 1968.

-23%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 →
110Routes 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 Purple Martin 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 →

No notable trend signals for Purple Martin in Georgia. See the full index history below.

Purple Martin Population Forecast in Georgia

If the recent trend holds, Purple Martin in Georgia is projected to rise about 14% by 2030 — from 9.5 in 2025 to a central estimate of 11 (95% range 3.9–18). A 5-year backtest shows a typical error of ±15.5%, 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 →
11Projected 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 →
3.9–1895% 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 →
±15.5%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, Purple Martin in Georgia is projected to rise about 14% by 2030 — from 9.5 in 2025 to a central estimate of 11 (95% range 3.9–18). A 5-year backtest shows a typical error of ±15.5%, 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 →
2026113.918
2027113.918
2028113.918
2029113.918
2030113.918

Purple Martin Survey Routes in Georgia

Routes recording Purple Martin 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 →
Workmore7820251978
Metasville6520001997
Dover5220251976
Fitzgerald3720251966
Lyons3619941966
Shiloh3520252012
Ousley3420252015
Fowlstown2820161967
Pitts2520251977
Boston2420251975
Amos Mill2420222016
Doles2320191975
Hiram2220181975
Owensboro2220252011
Rutledge2120251977
Oakman2020241970
Whitesburg2020251992
Dickey2020182006
Deepstep1920231975
Fairplay1519901966
Cotton1420251972
Lacross1420211973
Macon1420251979
Vidalia1420251995
Hawkinsville1320241966

Purple Martin Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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