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

Forest Birds In Oregon

All statesOregon

81 species in this guild. As a group they are -22%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 Oregon. See the full index history below.

Forest Birds In Oregon Population Forecast

If the recent trend holds, Forest birds in Oregon is projected to stay roughly flat through 2030, near 2.7 (95% range 2.2–3.2). A 5-year backtest shows a typical error of ±3.3%, with 100% of held-out values landing inside the 95% band.

-3%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 →
2.7Projected 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 →
2.2–3.295% 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 →
±3.3%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, Forest birds in Oregon is projected to stay roughly flat through 2030, near 2.7 (95% range 2.2–3.2). A 5-year backtest shows a typical error of ±3.3%, 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 →
20262.72.23.2
20272.72.23.2
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20292.72.23.2
20302.72.23.2

Member Species In Oregon

Forest birds species in Oregon.
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-83%
Purple FinchFringillidae-80%
Oak TitmouseParidae-78%
BushtitAegithalidae-78%
Lewis's WoodpeckerPicidae-77%
Rufous HummingbirdTrochilidae-72%
Orange-crowned WarblerParulidae-70%
Clark's NutcrackerCorvidae-68%
Fox SparrowPasserellidae-65%
Pine SiskinFringillidae-64%
Evening GrosbeakFringillidae-63%
Varied ThrushTurdidae-63%
American GoldfinchFringillidae-61%
Lincoln's SparrowPasserellidae-58%
Blue-gray GnatcatcherPolioptilidae-57%
Calliope HummingbirdTrochilidae-49%
White-crowned SparrowPasserellidae-48%
Canada JayCorvidae-46%
VeeryTurdidae-41%
Mountain BluebirdTurdidae-41%
Black-capped ChickadeeParidae-38%
Ruby-crowned KingletRegulidae-36%
Lesser GoldfinchFringillidae-36%
White-breasted NuthatchSittidae-33%
Band-tailed PigeonColumbidae-28%
Hermit ThrushTurdidae-28%
Marsh WrenTroglodytidae-27%
Gray CatbirdMimidae-27%
Song SparrowPasserellidae-26%
Red CrossbillFringillidae-23%
Swainson's ThrushTurdidae-21%
Chipping SparrowPasserellidae-20%
American RobinTurdidae-19%
Red-breasted NuthatchSittidae-17%
Pinyon JayCorvidae-17%
Spotted TowheePasserellidae-12%
Mountain ChickadeeParidae-8%
Yellow-breasted ChatIcteriidae-8%
MacGillivray's WarblerParulidae-6%
Black-throated Gray WarblerParulidae-4%
Golden-crowned KingletRegulidae-3%
Yellow WarblerParulidae+1%
Pygmy NuthatchSittidae+11%
Bullock's OrioleIcteridae+12%
Black-headed GrosbeakCardinalidae+13%
Black-chinned HummingbirdTrochilidae+15%
Downy WoodpeckerPicidae+16%
Hairy WoodpeckerPicidae+18%
Western TanagerCardinalidae+19%
Cassin's VireoVireonidae+24%
Wilson's WarblerParulidae+25%
Northern House WrenTroglodytidae+25%
Steller's JayCorvidae+31%
Red-naped SapsuckerPicidae+34%
Cedar WaxwingBombycillidae+37%
Cassin's FinchFringillidae+40%
Hermit WarblerParulidae+41%
Lazuli BuntingCardinalidae+47%
California Scrub-JayCorvidae+52%
Acorn WoodpeckerPicidae+55%
Bewick's WrenTroglodytidae+60%
Green-tailed TowheePasserellidae+68%
Warbling VireoVireonidae+69%
Brown CreeperCerthiidae+73%
Western BluebirdTurdidae+74%
Townsend's WarblerParulidae+98%
Pileated WoodpeckerPicidae+102%
Pacific WrenTroglodytidae+104%
WrentitSylviidae+112%
Anna's HummingbirdTrochilidae+113%
Canyon WrenTroglodytidae+119%
Black-backed WoodpeckerPicidae+125%
White-headed WoodpeckerPicidae+129%
Chestnut-backed ChickadeeParidae+137%
Townsend's SolitaireTurdidae+147%
Red-breasted SapsuckerPicidae+155%
Rock WrenTroglodytidae+194%
Nashville WarblerParulidae+299%
Williamson's SapsuckerPicidae+326%
Hutton's VireoVireonidae+476%
Common YellowthroatParulidae+535%

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