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

Forest Birds In Wyoming

All statesWyoming

38 species in this guild. As a group they are -21%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 Wyoming. See the full index history below.

Forest Birds In Wyoming Population Forecast

If the recent trend holds, Forest birds in Wyoming is projected to stay roughly flat through 2029, near 1.6 (95% range 1.2–2.0). A 5-year backtest shows a typical error of ±5.9%, with 100% of held-out values landing inside the 95% band.

+4%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 →
1.6Projected 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 →
1.2–2.095% 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 →
±5.9%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 Wyoming is projected to stay roughly flat through 2029, near 1.6 (95% range 1.2–2.0). A 5-year backtest shows a typical error of ±5.9%, 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 →
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Member Species In Wyoming

Forest birds species in Wyoming.
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 →
Canyon WrenTroglodytidae-98%
White-breasted NuthatchSittidae-87%
Bewick's WrenTroglodytidae-86%
Lewis's WoodpeckerPicidae-75%
Downy WoodpeckerPicidae-68%
Red-headed WoodpeckerPicidae-68%
Marsh WrenTroglodytidae-57%
Orange-crowned WarblerParulidae-54%
Williamson's SapsuckerPicidae-52%
Pygmy NuthatchSittidae-49%
Wilson's WarblerParulidae-49%
Townsend's SolitaireTurdidae-37%
Plumbeous VireoVireonidae-35%
Brown CreeperCerthiidae-34%
Blue-gray GnatcatcherPolioptilidae-33%
Rock WrenTroglodytidae-28%
Swainson's ThrushTurdidae-14%
American RedstartParulidae-14%
Golden-crowned KingletRegulidae-9%
VeeryTurdidae-6%
Black-backed WoodpeckerPicidae-2%
American RobinTurdidae-1%
Black-capped ChickadeeParidae-0%
Hairy WoodpeckerPicidae+4%
Red-naped SapsuckerPicidae+7%
Mountain ChickadeeParidae+22%
American Three-toed WoodpeckerPicidae+45%
Yellow WarblerParulidae+48%
Warbling VireoVireonidae+53%
Red-eyed VireoVireonidae+88%
Common YellowthroatParulidae+93%
Red-breasted NuthatchSittidae+94%
MacGillivray's WarblerParulidae+110%
Mountain BluebirdTurdidae+187%
Northern House WrenTroglodytidae+308%
Ruby-crowned KingletRegulidae+405%
Hermit ThrushTurdidae+704%
OvenbirdParulidae+780%

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