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

Generalists In Nevada

All statesNevada

64 species in this guild. As a group they are -4%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 Nevada. See the full index history below.

Generalists In Nevada Population Forecast

If the recent trend holds, Generalists in Nevada is projected to fall about 18% by 2029 — from 4.7 in 2024 to a central estimate of 3.8 (95% range 0.00–9.8). A 5-year backtest shows a typical error of ±14.1%, with 100% of held-out values landing inside the 95% band.

-18%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 →
3.8Projected 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 →
0.00–9.895% 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 →
±14.1%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 Nevada is projected to fall about 18% by 2029 — from 4.7 in 2024 to a central estimate of 3.8 (95% range 0.00–9.8). A 5-year backtest shows a typical error of ±14.1%, 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 →
20254.00.0010.0
20264.00.009.9
20273.90.009.9
20283.90.009.8
20293.80.009.8

Member Species In Nevada

Generalists species in Nevada.
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 →
Crissal ThrasherMimidae-91%
Cassin's FinchFringillidae-84%
Bendire's ThrasherMimidae-76%
Scott's OrioleIcteridae-75%
Burrowing OwlStrigidae-68%
Pinyon JayCorvidae-64%
LeConte's ThrasherMimidae-60%
Woodhouse's Scrub-JayCorvidae-59%
Black-chinned SparrowPasserellidae-59%
Broad-tailed HummingbirdTrochilidae-57%
White-crowned SparrowPasserellidae-43%
Mourning DoveColumbidae-40%
Sagebrush SparrowPasserellidae-40%
Greater Sage-GrousePhasianidae-39%
Red-winged BlackbirdIcteridae-33%
Sage ThrasherMimidae-32%
Loggerhead ShrikeLaniidae-32%
Short-eared OwlStrigidae-31%
Belted KingfisherAlcedinidae-30%
Steller's JayCorvidae-30%
BushtitAegithalidae-29%
Golden EagleAccipitridae-17%
Prairie FalconFalconidae-15%
Brewer's BlackbirdIcteridae-12%
Cooper's HawkAccipitridae-8%
Fox SparrowPasserellidae-4%
American KestrelFalconidae+6%
Rock PigeonColumbidae+14%
American GoldfinchFringillidae+14%
Chipping SparrowPasserellidae+28%
Ferruginous HawkAccipitridae+35%
Spotted TowheePasserellidae+38%
Costa's HummingbirdTrochilidae+39%
Clark's NutcrackerCorvidae+40%
Bullock's OrioleIcteridae+42%
Northern MockingbirdMimidae+50%
Brewer's SparrowPasserellidae+88%
House FinchFringillidae+92%
Blue GrosbeakCardinalidae+94%
Black-headed GrosbeakCardinalidae+95%
Black-chinned HummingbirdTrochilidae+103%
Great Horned OwlStrigidae+109%
Black-billed MagpieCorvidae+117%
Great-tailed GrackleIcteridae+119%
Song SparrowPasserellidae+153%
Western TanagerCardinalidae+154%
Green-tailed TowheePasserellidae+157%
Brown-headed CowbirdIcteridae+176%
Northern HarrierAccipitridae+187%
Pine SiskinFringillidae+242%
Swainson's HawkAccipitridae+246%
European StarlingSturnidae+291%
House SparrowPasseridae+293%
Turkey VultureCathartidae+362%
Yellow-headed BlackbirdIcteridae+400%
Red-tailed HawkAccipitridae+422%
Common RavenCorvidae+426%
ChukarPhasianidae+695%
Lesser GoldfinchFringillidae+755%
Yellow-breasted ChatIcteriidae+785%
American CrowCorvidae+974%
Lazuli BuntingCardinalidae16×
Eurasian Collared-DoveColumbidae31×
California QuailOdontophoridae39×

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