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

Generalists In Mississippi

All statesMississippi

12 species in this guild. As a group they are -66%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 fallen sharply in Mississippi, down 66% since 1968.

Generalists In Mississippi Population Forecast

If the recent trend holds, Generalists in Mississippi is projected to fall about 40% by 2030 — from 8.0 in 2025 to a central estimate of 4.8 (95% range 1.6–8.0). A 5-year backtest shows a typical error of ±19.8%, with 80% of held-out values landing inside the 95% band.

-40%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 →
4.8Projected 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 →
1.6–8.095% 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 →
±19.8%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 Mississippi is projected to fall about 40% by 2030 — from 8.0 in 2025 to a central estimate of 4.8 (95% range 1.6–8.0). A 5-year backtest shows a typical error of ±19.8%, 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 →
20266.12.89.3
20275.72.59.0
20285.42.28.6
20295.11.98.3
20304.81.68.0

Member Species In Mississippi

Generalists species in Mississippi.
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-94%
Common GrackleIcteridae-92%
Northern MockingbirdMimidae-70%
European StarlingSturnidae-65%
Rock PigeonColumbidae-50%
Mourning DoveColumbidae-14%
Common Ground DoveColumbidae-11%
American CrowCorvidae-7%
Brown-headed CowbirdIcteridae+60%
Fish CrowCorvidae+141%
House FinchFringillidae+209%
Eurasian Collared-DoveColumbidae+681%

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