BirdAnalyst
Guild · Indiana · BBS 2025 Release · 1966–2024

Generalists In Indiana

All statesIndiana

49 species in this guild. As a group they are -52%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 Indiana, down 52% since 1968.

Forecast

If the recent trend holds, Generalists in Indiana is projected to fall about 21% by 2029 — from 12 in 2024 to a central estimate of 9.5 (95% range 6.3–13). A 5-year backtest shows a typical error of ±8.7%, with 100% of held-out values landing inside the 95% band.

-21%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 →
9.5Projected 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 →
6.3–1395% 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 →
±8.7%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 Indiana is projected to fall about 21% by 2029 — from 12 in 2024 to a central estimate of 9.5 (95% range 6.3–13). A 5-year backtest shows a typical error of ±8.7%, 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 →
2025107.214
2026107.013
20279.96.813
20289.76.513
20299.56.313

Member Species In Indiana

Generalists species in Indiana.
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 →
Black-billed CuckooCuculidae-85%
House SparrowPasseridae-80%
Yellow-billed CuckooCuculidae-78%
Swamp SparrowPasserellidae-72%
Broad-winged HawkAccipitridae-72%
Eastern Screech-OwlStrigidae-66%
Sharp-shinned HawkAccipitridae-66%
Northern HarrierAccipitridae-65%
Common GrackleIcteridae-62%
Yellow-breasted ChatIcteriidae-61%
Red-winged BlackbirdIcteridae-59%
Field SparrowPasserellidae-55%
Belted KingfisherAlcedinidae-54%
Brown ThrasherMimidae-49%
Loggerhead ShrikeLaniidae-45%
Northern MockingbirdMimidae-29%
Ruby-throated HummingbirdTrochilidae-23%
Indigo BuntingCardinalidae-22%
Mourning DoveColumbidae-18%
Great Horned OwlStrigidae-17%
Song SparrowPasserellidae-13%
Rock PigeonColumbidae-10%
American GoldfinchFringillidae-8%
European StarlingSturnidae-7%
Blue JayCorvidae+3%
Brown-headed CowbirdIcteridae+8%
American CrowCorvidae+8%
Summer TanagerCardinalidae+27%
Gray CatbirdMimidae+28%
American KestrelFalconidae+35%
Northern CardinalCardinalidae+37%
Barred OwlStrigidae+53%
Eastern TowheePasserellidae+66%
Eurasian Collared-DoveColumbidae+67%
Orchard OrioleIcteridae+69%
Scarlet TanagerCardinalidae+96%
Cooper's HawkAccipitridae+110%
Baltimore OrioleIcteridae+166%
Bald EagleAccipitridae+247%
Chipping SparrowPasserellidae+308%
Red-tailed HawkAccipitridae+339%
Black VultureCathartidae+346%
Rose-breasted GrosbeakCardinalidae+353%
Red-shouldered HawkAccipitridae+436%
Cedar WaxwingBombycillidae+452%
House FinchFringillidae+979%
Turkey VultureCathartidae16×
Wild TurkeyPhasianidae30×
Blue GrosbeakCardinalidae33×

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.