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Species · Georgia · BBS 2025 Release · 1966–2024

Purple Martin Population Trend in Georgia

All statesAerial insectivores

Purple Martin in Georgia has edged down: down 20% on the route-weighted index since 1968.

-20%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 →
58YearsYears 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 stay roughly flat through 2029, near 11 (95% range 4.0–18). A 5-year backtest shows a typical error of ±12.9%, with 100% of held-out values landing inside the 95% band.

+6%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 →
11Projected 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 →
4.0–1895% 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 →
±12.9%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 stay roughly flat through 2029, near 11 (95% range 4.0–18). A 5-year backtest shows a typical error of ±12.9%, with 100% of held-out values landing inside the 95% band.19662029
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 →
2025114.018
2026114.018
2027114.018
2028114.018
2029114.018

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 →
Ousley8820242015
Metasville6520001997
Dover6220241976
Workmore4320191978
Lyons3619941966
Lakeview3520242006
Wadley3420241983
Rutledge3320241977
Athens3120241970
Fowlstown2820161967
Bethany2520242012
Boston2420241975
Amos Mill2420222016
Henderson2320241973
Doles2320191975
Hiram2220181975
Fitzgerald2120241966
Oakman2020241970
Dickey2020182006
Candler2020242009
Deepstep1920231975
Davis Crossroads1820212012
Shiloh1720242012
Stockton1620241977
Fairplay1519901966

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 2026-05-22.