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

Generalists In Georgia

All statesGeorgia

12 species in this guild. As a group they are -47%Guild trendA mean-index aggregate across the species in this group — the structural direction of the guild, with individual-species noise smoothed out.Full methodology → since 1968.

Guild SignalsNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

guild collapsecomputed 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 →

Generalists as a group have declined in Georgia, down 47% since 1968.

Generalists In Georgia Population Forecast

If the recent trend holds, Generalists in Georgia is projected to fall about 26% by 2030 — from 13 in 2025 to a central estimate of 9.7 (95% range 6.5–13). A 5-year backtest shows a typical error of ±22%, with 40% of held-out values landing inside the 95% band.

-26%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 →
9.7Projected 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 →
6.5–1395% 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 →
±22%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, Generalists in Georgia is projected to fall about 26% by 2030 — from 13 in 2025 to a central estimate of 9.7 (95% range 6.5–13). A 5-year backtest shows a typical error of ±22%, with 40% 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 →
2026117.414
2027107.214
2028107.013
202910.06.813
20309.76.513

Member Species In Georgia

Generalists species in Georgia.
TrendPercent 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 →
House SparrowPasseridae-95%
Common GrackleIcteridae-83%
European StarlingSturnidae-48%
Northern MockingbirdMimidae-33%
Common Ground DoveColumbidae-29%
Rock PigeonColumbidae-22%
Mourning DoveColumbidae-1%
Fish CrowCorvidae+21%
American CrowCorvidae+36%
Brown-headed CowbirdIcteridae+272%
Eurasian Collared-DoveColumbidae+779%
House FinchFringillidae15×

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