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

Generalists In Nebraska

All statesNebraska

61 species in this guild. As a group they are -29%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 →

No notable trend signals for generalists in Nebraska. See the full index history below.

Forecast

If the recent trend holds, Generalists in Nebraska is projected to fall about 22% by 2029 — from 7.1 in 2024 to a central estimate of 5.5 (95% range 3.5–7.6). A 5-year backtest shows a typical error of ±20.3%, with 100% of held-out values landing inside the 95% band.

-22%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 →
5.5Projected 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 →
3.5–7.695% 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 →
±20.3%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, Generalists in Nebraska is projected to fall about 22% by 2029 — from 7.1 in 2024 to a central estimate of 5.5 (95% range 3.5–7.6). A 5-year backtest shows a typical error of ±20.3%, with 100% of held-out values landing inside the 95% band.19672029
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 →
20255.83.87.9
20265.83.77.8
20275.73.67.7
20285.63.67.6
20295.53.57.6

Member Species In Nebraska

Generalists species in Nebraska.
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 →
Chestnut-collared LongspurCalcariidae-96%
Black-billed CuckooCuculidae-84%
House SparrowPasseridae-83%
Red CrossbillFringillidae-83%
Loggerhead ShrikeLaniidae-79%
Thick-billed LongspurCalcariidae-77%
Northern HarrierAccipitridae-71%
Brewer's SparrowPasserellidae-71%
Black-billed MagpieCorvidae-70%
Northern MockingbirdMimidae-70%
Golden EagleAccipitridae-63%
Sharp-tailed GrousePhasianidae-58%
Eastern Screech-OwlStrigidae-50%
Rock PigeonColumbidae-47%
Burrowing OwlStrigidae-45%
Brown ThrasherMimidae-44%
Lazuli BuntingCardinalidae-43%
Belted KingfisherAlcedinidae-42%
Eastern TowheePasserellidae-34%
Common GrackleIcteridae-30%
American CrowCorvidae-30%
Prairie FalconFalconidae-28%
Yellow-billed CuckooCuculidae-24%
Ferruginous HawkAccipitridae-10%
Mourning DoveColumbidae+1%
Gray CatbirdMimidae+4%
Rose-breasted GrosbeakCardinalidae+5%
Blue JayCorvidae+12%
American KestrelFalconidae+16%
Red-winged BlackbirdIcteridae+19%
Brown-headed CowbirdIcteridae+25%
Great Horned OwlStrigidae+26%
Yellow-headed BlackbirdIcteridae+33%
Bullock's OrioleIcteridae+36%
Baltimore OrioleIcteridae+57%
Scarlet TanagerCardinalidae+64%
Swainson's HawkAccipitridae+70%
European StarlingSturnidae+73%
American GoldfinchFringillidae+74%
Indigo BuntingCardinalidae+84%
Great-tailed GrackleIcteridae+119%
Brewer's BlackbirdIcteridae+122%
Swamp SparrowPasserellidae+124%
Black-headed GrosbeakCardinalidae+126%
Field SparrowPasserellidae+131%
Cooper's HawkAccipitridae+156%
Northern CardinalCardinalidae+178%
Short-eared OwlStrigidae+205%
Red-tailed HawkAccipitridae+226%
Blue GrosbeakCardinalidae+269%
Orchard OrioleIcteridae+368%
Cedar WaxwingBombycillidae+389%
Bald EagleAccipitridae+394%
Yellow-breasted ChatIcteriidae+573%
Chipping SparrowPasserellidae+612%
Song SparrowPasserellidae+621%
House FinchFringillidae+837%
Spotted TowheePasserellidae12×
Wild TurkeyPhasianidae45×
Turkey VultureCathartidae57×
Eurasian Collared-DoveColumbidae101×

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