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

Generalists In Louisiana

All statesLouisiana

15 species in this guild. As a group they are -62%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 1969.

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 fallen sharply in Louisiana, down 62% since 1969.

Generalists In Louisiana Population Forecast

If the recent trend holds, Generalists in Louisiana is projected to fall about 30% by 2030 — from 9.7 in 2025 to a central estimate of 6.8 (95% range 1.6–12). A 5-year backtest shows a typical error of ±12.6%, with 100% of held-out values landing inside the 95% band.

-30%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 →
6.8Projected 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 →
1.6–1295% 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 →
±12.6%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 Louisiana is projected to fall about 30% by 2030 — from 9.7 in 2025 to a central estimate of 6.8 (95% range 1.6–12). A 5-year backtest shows a typical error of ±12.6%, with 100% of held-out values landing inside the 95% band.19672030
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 →
20268.12.813
20277.82.513
20287.52.213
20297.11.912
20306.81.612

Member Species In Louisiana

Generalists species in Louisiana.
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 →
Common Ground DoveColumbidae-89%
House SparrowPasseridae-86%
Common GrackleIcteridae-84%
Rock PigeonColumbidae-81%
Northern MockingbirdMimidae-35%
European StarlingSturnidae-13%
Bronzed CowbirdIcteridae+1%
Brown-headed CowbirdIcteridae+26%
House FinchFringillidae+63%
American CrowCorvidae+77%
Fish CrowCorvidae+102%
Mourning DoveColumbidae+107%
Eurasian Collared-DoveColumbidae+485%
Inca DoveColumbidae+621%
White-winged DoveColumbidae+788%

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