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

Forest Birds In Oregon

All statesOregon

48 species in this guild. As a group they are -16%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.

Forecast

If the recent trend holds, Forest birds in Oregon is projected to rise about 19% by 2029 — from 2.4 in 2024 to a central estimate of 2.8 (95% range 2.3–3.4). A 5-year backtest shows a typical error of ±10.1%, with 80% of held-out values landing inside the 95% band.

+19%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 →
2.8Projected 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 →
2.3–3.495% 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 →
±10.1%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, Forest birds in Oregon is projected to rise about 19% by 2029 — from 2.4 in 2024 to a central estimate of 2.8 (95% range 2.3–3.4). A 5-year backtest shows a typical error of ±10.1%, with 80% 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 →
20252.82.33.3
20262.82.33.3
20272.82.33.3
20282.82.33.4
20292.82.33.4

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 →
VeeryTurdidae-83%
Red-eyed VireoVireonidae-81%
Lewis's WoodpeckerPicidae-77%
Oak TitmouseParidae-68%
Orange-crowned WarblerParulidae-65%
Varied ThrushTurdidae-62%
Blue-gray GnatcatcherPolioptilidae-45%
Black-capped ChickadeeParidae-42%
Mountain BluebirdTurdidae-35%
White-breasted NuthatchSittidae-32%
Ruby-crowned KingletRegulidae-31%
Swainson's ThrushTurdidae-28%
Hermit ThrushTurdidae-26%
Red-breasted NuthatchSittidae-23%
American RobinTurdidae-19%
MacGillivray's WarblerParulidae-17%
Golden-crowned KingletRegulidae-15%
Mountain ChickadeeParidae-15%
Yellow WarblerParulidae-6%
Marsh WrenTroglodytidae-1%
Black-throated Gray WarblerParulidae+1%
Hairy WoodpeckerPicidae+7%
Downy WoodpeckerPicidae+11%
Cassin's VireoVireonidae+21%
Brown CreeperCerthiidae+30%
Northern House WrenTroglodytidae+31%
Wilson's WarblerParulidae+32%
Pygmy NuthatchSittidae+33%
Hermit WarblerParulidae+45%
Acorn WoodpeckerPicidae+60%
Warbling VireoVireonidae+70%
Bewick's WrenTroglodytidae+72%
Western BluebirdTurdidae+74%
Pileated WoodpeckerPicidae+83%
Townsend's WarblerParulidae+85%
Chestnut-backed ChickadeeParidae+94%
Red-breasted SapsuckerPicidae+106%
Canyon WrenTroglodytidae+107%
Red-naped SapsuckerPicidae+113%
Black-backed WoodpeckerPicidae+114%
Pacific WrenTroglodytidae+124%
White-headed WoodpeckerPicidae+144%
Townsend's SolitaireTurdidae+169%
Rock WrenTroglodytidae+191%
Williamson's SapsuckerPicidae+314%
Nashville WarblerParulidae+351%
Hutton's VireoVireonidae+447%
Common YellowthroatParulidae+612%

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