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

Generalists In Utah

All statesUtah

80 species in this guild. As a group they are -27%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 1970.

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 Utah. See the full index history below.

Generalists In Utah Population Forecast

If the recent trend holds, Generalists in Utah is projected to fall about 36% by 2029 — from 2.4 in 2024 to a central estimate of 1.5 (95% range 0.00–3.7). A 5-year backtest shows a typical error of ±21.7%, with 100% of held-out values landing inside the 95% band.

-36%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 →
1.5Projected 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 →
0.00–3.795% 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 →
±21.7%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 Utah is projected to fall about 36% by 2029 — from 2.4 in 2024 to a central estimate of 1.5 (95% range 0.00–3.7). A 5-year backtest shows a typical error of ±21.7%, with 100% of held-out values landing inside the 95% band.19682029
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 →
20251.70.003.9
20261.60.003.8
20271.60.003.8
20281.60.003.7
20291.50.003.7

Member Species In Utah

Generalists species in Utah.
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 →
Bendire's ThrasherMimidae-98%
Band-tailed PigeonColumbidae-96%
American DipperCinclidae-94%
Evening GrosbeakFringillidae-94%
Greater Sage-GrousePhasianidae-92%
Belted KingfisherAlcedinidae-89%
Canada JayCorvidae-89%
Woodhouse's Scrub-JayCorvidae-88%
Common GrackleIcteridae-88%
Sharp-shinned HawkAccipitridae-84%
Black-chinned SparrowPasserellidae-82%
American GoshawkAccipitridae-80%
Pine GrosbeakFringillidae-77%
Burrowing OwlStrigidae-74%
Cooper's HawkAccipitridae-72%
Calliope HummingbirdTrochilidae-70%
Ruffed GrousePhasianidae-66%
ChukarPhasianidae-65%
Black-billed MagpieCorvidae-60%
Ferruginous HawkAccipitridae-60%
American KestrelFalconidae-60%
Scott's OrioleIcteridae-58%
Brewer's BlackbirdIcteridae-57%
Prairie FalconFalconidae-55%
Fox SparrowPasserellidae-53%
Song SparrowPasserellidae-52%
Peregrine FalconFalconidae-51%
BushtitAegithalidae-50%
Indigo BuntingCardinalidae-50%
Great Horned OwlStrigidae-48%
Mourning DoveColumbidae-42%
Broad-tailed HummingbirdTrochilidae-41%
Swainson's HawkAccipitridae-41%
Gray CatbirdMimidae-38%
Great-tailed GrackleIcteridae-37%
Sagebrush SparrowPasserellidae-36%
Dusky GrousePhasianidae-36%
Steller's JayCorvidae-34%
Red-tailed HawkAccipitridae-33%
Short-eared OwlStrigidae-32%
Northern HarrierAccipitridae-30%
Black-chinned HummingbirdTrochilidae-26%
House SparrowPasseridae-23%
Pinyon JayCorvidae-18%
Sage ThrasherMimidae-10%
Red CrossbillFringillidae-3%
Golden EagleAccipitridae-1%
European StarlingSturnidae+23%
Cedar WaxwingBombycillidae+24%
American GoldfinchFringillidae+24%
Blue GrosbeakCardinalidae+26%
Pine SiskinFringillidae+36%
American CrowCorvidae+38%
Brown-headed CowbirdIcteridae+39%
Wild TurkeyPhasianidae+43%
Brewer's SparrowPasserellidae+45%
Chipping SparrowPasserellidae+57%
Green-tailed TowheePasserellidae+60%
Lesser GoldfinchFringillidae+89%
Rock PigeonColumbidae+93%
Loggerhead ShrikeLaniidae+105%
Cassin's FinchFringillidae+124%
Clark's NutcrackerCorvidae+133%
Western TanagerCardinalidae+135%
Lazuli BuntingCardinalidae+136%
Spotted TowheePasserellidae+153%
Yellow-headed BlackbirdIcteridae+174%
Black-headed GrosbeakCardinalidae+205%
Common RavenCorvidae+262%
Red-winged BlackbirdIcteridae+263%
Bullock's OrioleIcteridae+283%
Lincoln's SparrowPasserellidae+373%
Turkey VultureCathartidae+422%
White-crowned SparrowPasserellidae+483%
Northern MockingbirdMimidae+572%
OspreyPandionidae+578%
House FinchFringillidae+609%
Yellow-breasted ChatIcteriidae+824%
California QuailOdontophoridae+832%
Eurasian Collared-DoveColumbidae22×

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