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

Generalists In Washington

All statesWashington

80 species in this guild. As a group they are -20%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 Washington. See the full index history below.

Generalists In Washington Population Forecast

If the recent trend holds, Generalists in Washington is projected to fall about 15% by 2029 — from 3.9 in 2024 to a central estimate of 3.3 (95% range 2.4–4.2). A 5-year backtest shows a typical error of ±4%, with 100% of held-out values landing inside the 95% band.

-15%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 →
3.3Projected 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 →
2.4–4.295% 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 →
±4%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 Washington is projected to fall about 15% by 2029 — from 3.9 in 2024 to a central estimate of 3.3 (95% range 2.4–4.2). A 5-year backtest shows a typical error of ±4%, 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 →
20253.42.54.3
20263.42.54.3
20273.42.54.3
20283.32.44.2
20293.32.44.2

Member Species In Washington

Generalists species in Washington.
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 →
Marbled MurreletAlcidae-88%
Loggerhead ShrikeLaniidae-81%
Calliope HummingbirdTrochilidae-73%
Burrowing OwlStrigidae-72%
Great Horned OwlStrigidae-71%
Pigeon GuillemotAlcidae-69%
Evening GrosbeakFringillidae-69%
Rufous HummingbirdTrochilidae-65%
Ruffed GrousePhasianidae-64%
Ferruginous HawkAccipitridae-64%
Dusky GrousePhasianidae-61%
Pine GrosbeakFringillidae-59%
Rhinoceros AukletAlcidae-59%
Sharp-shinned HawkAccipitridae-56%
Gray PartridgePhasianidae-56%
Western Screech-OwlStrigidae-55%
Brown-headed CowbirdIcteridae-52%
American CrowCorvidae-46%
American GoldfinchFringillidae-46%
Brewer's BlackbirdIcteridae-42%
Cassin's FinchFringillidae-42%
Clark's NutcrackerCorvidae-41%
Cedar WaxwingBombycillidae-39%
Pine SiskinFringillidae-37%
BushtitAegithalidae-37%
Lincoln's SparrowPasserellidae-35%
Northern HarrierAccipitridae-32%
American GoshawkAccipitridae-31%
Purple FinchFringillidae-31%
Black-billed MagpieCorvidae-31%
Prairie FalconFalconidae-27%
Gray CatbirdMimidae-23%
Yellow-headed BlackbirdIcteridae-18%
Chipping SparrowPasserellidae-18%
Mourning DoveColumbidae-16%
Short-eared OwlStrigidae-16%
American DipperCinclidae-15%
Belted KingfisherAlcedinidae-14%
House SparrowPasseridae-12%
American KestrelFalconidae-12%
Golden EagleAccipitridae-11%
White-crowned SparrowPasserellidae-9%
Sagebrush SparrowPasserellidae-8%
Song SparrowPasserellidae-6%
Northern Pygmy-OwlStrigidae-4%
Band-tailed PigeonColumbidae-4%
Bullock's OrioleIcteridae-4%
Cooper's HawkAccipitridae-3%
Black-chinned HummingbirdTrochilidae+1%
American Barn OwlTytonidae+4%
ChukarPhasianidae+7%
Fox SparrowPasserellidae+10%
Sooty GrousePhasianidae+12%
Yellow-breasted ChatIcteriidae+16%
Lazuli BuntingCardinalidae+27%
Turkey VultureCathartidae+29%
European StarlingSturnidae+52%
Spotted TowheePasserellidae+55%
Red CrossbillFringillidae+62%
Steller's JayCorvidae+78%
Western TanagerCardinalidae+83%
Sage ThrasherMimidae+89%
House FinchFringillidae+129%
Barred OwlStrigidae+142%
Canada JayCorvidae+162%
Peregrine FalconFalconidae+196%
Red-tailed HawkAccipitridae+201%
Swainson's HawkAccipitridae+208%
Red-winged BlackbirdIcteridae+237%
Black-headed GrosbeakCardinalidae+271%
Brewer's SparrowPasserellidae+302%
Rock PigeonColumbidae+317%
California QuailOdontophoridae+319%
OspreyPandionidae+346%
California Scrub-JayCorvidae+384%
Common RavenCorvidae+483%
Bald EagleAccipitridae+747%
Anna's HummingbirdTrochilidae12×
Wild TurkeyPhasianidae13×
Eurasian Collared-DoveColumbidae31×

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