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

Arid-land Birds In Wyoming

All statesWyoming

3 species in this guild. As a group they are +63%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 arid-land birds in Wyoming. See the full index history below.

Arid-land Birds In Wyoming Population Forecast

If the recent trend holds, Arid-land birds in Wyoming is projected to fall about 38% by 2029 — from 13 in 2024 to a central estimate of 8.3 (95% range 0.00–19). A 5-year backtest shows a typical error of ±21.6%, with 100% of held-out values landing inside the 95% band.

-38%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 →
8.3Projected 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 →
0.00–1995% 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 →
±21.6%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, Arid-land birds in Wyoming is projected to fall about 38% by 2029 — from 13 in 2024 to a central estimate of 8.3 (95% range 0.00–19). A 5-year backtest shows a typical error of ±21.6%, 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 →
20258.60.0019
20268.50.0019
20278.40.0019
20288.40.0019
20298.30.0019

Member Species In Wyoming

Arid-land 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 →
Brewer's SparrowPasserellidae+46%
Sage ThrasherMimidae+96%
Sagebrush SparrowPasserellidae+105%

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