BirdAnalyst
Guild · Washington · BBS 2026 Release · 1966–2025

Forest Birds In Washington

All statesWashington

79 species in this guild. As a group they are -19%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 forest birds in Washington. See the full index history below.

Forest Birds In Washington Population Forecast

If the recent trend holds, Forest birds in Washington is projected to fall about 16% by 2030 — from 4.0 in 2025 to a central estimate of 3.3 (95% range 2.5–4.2). A 5-year backtest shows a typical error of ±10.2%, with 100% of held-out values landing inside the 95% band.

-16%Change by 2030TrendPercent 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 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
2.5–4.295% 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 →
±10.2%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, Forest birds in Washington is projected to fall about 16% by 2030 — from 4.0 in 2025 to a central estimate of 3.3 (95% range 2.5–4.2). A 5-year backtest shows a typical error of ±10.2%, with 100% of held-out values landing inside the 95% band.19682030
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 →
20263.42.54.2
20273.42.54.2
20283.32.54.2
20293.32.54.2
20303.32.54.2

Member Species In Washington

Forest birds 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 →
Red-eyed VireoVireonidae-86%
Lewis's WoodpeckerPicidae-84%
Calliope HummingbirdTrochilidae-79%
White-breasted NuthatchSittidae-76%
Evening GrosbeakFringillidae-74%
American Three-toed WoodpeckerPicidae-70%
Rufous HummingbirdTrochilidae-68%
Clark's NutcrackerCorvidae-60%
VeeryTurdidae-60%
Pine GrosbeakFringillidae-59%
Orange-crowned WarblerParulidae-59%
Black-chinned HummingbirdTrochilidae-47%
Yellow WarblerParulidae-47%
American GoldfinchFringillidae-46%
American RedstartParulidae-46%
Black-throated Gray WarblerParulidae-42%
Cedar WaxwingBombycillidae-41%
Lincoln's SparrowPasserellidae-38%
Cassin's FinchFringillidae-35%
Gray CatbirdMimidae-34%
Wilson's WarblerParulidae-34%
White-headed WoodpeckerPicidae-33%
Swainson's ThrushTurdidae-32%
Purple FinchFringillidae-29%
Mountain ChickadeeParidae-29%
American RobinTurdidae-29%
BushtitAegithalidae-27%
Black-capped ChickadeeParidae-25%
Black-backed WoodpeckerPicidae-25%
MacGillivray's WarblerParulidae-24%
Downy WoodpeckerPicidae-19%
Pine SiskinFringillidae-19%
Chipping SparrowPasserellidae-14%
Band-tailed PigeonColumbidae-10%
Cassin's VireoVireonidae-10%
Song SparrowPasserellidae-4%
Varied ThrushTurdidae-1%
White-crowned SparrowPasserellidae+0%
Bullock's OrioleIcteridae+5%
Hermit WarblerParulidae+5%
Red CrossbillFringillidae+6%
Pacific WrenTroglodytidae+11%
Pygmy NuthatchSittidae+23%
Golden-crowned KingletRegulidae+28%
Lazuli BuntingCardinalidae+31%
Pileated WoodpeckerPicidae+36%
Fox SparrowPasserellidae+41%
Townsend's SolitaireTurdidae+47%
Yellow-breasted ChatIcteriidae+47%
Hutton's VireoVireonidae+48%
Bewick's WrenTroglodytidae+60%
Hairy WoodpeckerPicidae+66%
Spotted TowheePasserellidae+67%
Lesser GoldfinchFringillidae+81%
Red-naped SapsuckerPicidae+86%
Western TanagerCardinalidae+90%
Western BluebirdTurdidae+91%
Steller's JayCorvidae+93%
Chestnut-backed ChickadeeParidae+93%
Rock WrenTroglodytidae+94%
Northern WaterthrushParulidae+99%
Warbling VireoVireonidae+114%
Red-breasted NuthatchSittidae+136%
Ruby-crowned KingletRegulidae+145%
Hermit ThrushTurdidae+152%
Townsend's WarblerParulidae+154%
Marsh WrenTroglodytidae+171%
Northern House WrenTroglodytidae+210%
Canada JayCorvidae+215%
Common YellowthroatParulidae+279%
Red-breasted SapsuckerPicidae+305%
Canyon WrenTroglodytidae+312%
Black-headed GrosbeakCardinalidae+316%
Mountain BluebirdTurdidae+340%
California Scrub-JayCorvidae+403%
Williamson's SapsuckerPicidae+528%
Brown CreeperCerthiidae+604%
Nashville WarblerParulidae+761%
Anna's HummingbirdTrochilidae11×

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.