BirdAnalyst
Species · Georgia · BBS 2026 Release · 1966–2025

Loggerhead Shrike Population Trend in Georgia

All statesGrassland birds

Loggerhead Shrike in Georgia has fallen sharply: down 74% on the route-weighted index since 1968.

-74%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 →
84Routes 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 Loggerhead Shrike 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 declinecomputed 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 →

Loggerhead Shrike has fallen sharply in Georgia: down 74% on the route-weighted index since 1968.

Loggerhead Shrike Population Forecast in Georgia

If the recent trend holds, Loggerhead Shrike in Georgia is projected to fall about 100% by 2030 — from 0.97 in 2025 to a central estimate of 0.00 (95% range 0.00–1.3). A 5-year backtest shows a typical error of ±120.3%, with 80% of held-out values landing inside the 95% band.

-100%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 →
0.00Projected 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 →
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 →
±120.3%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, Loggerhead Shrike in Georgia is projected to fall about 100% by 2030 — from 0.97 in 2025 to a central estimate of 0.00 (95% range 0.00–1.3). A 5-year backtest shows a typical error of ±120.3%, with 80% 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 →
20260.000.001.3
20270.000.001.3
20280.000.001.3
20290.000.001.3
20300.000.001.3

Loggerhead Shrike Survey Routes in Georgia

Routes recording Loggerhead Shrike 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 →
Lincolnton 2620252021
Thornton Road620252024
Weber620252015
Finleyson520251976
Darien420011967
Henderson420251974
Stockbridge420231976
Dover420241976
Boston420251975
Shiloh420242019
Owensboro420252016
Hebron420142014
Lyons319941966
Waycross319821970
Rentz320251977
Workmore320251978
Millen320242006
Ousley320242015
Carrs Station320242017
Harrietts Bl220242021
Stockton220251977
Cuthbert220221967
Guyton219891966
Fairplay219661966
Cartersville219791979

Loggerhead Shrike Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradofloridaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmichiganminnesotamississippimissourimontananebraskanevadanew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniasouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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