Guild · Idaho · BBS 2025 Release · 1966–2024

Arid-land Birds In Idaho

4 species in this guild. As a group they are +0% since 1970.

Guild Signals

No notable trend signals for arid-land birds in Idaho. See the full index history below.

Forecast

If the recent trend holds, Arid-land birds in Idaho is projected to fall about 20% by 2029 — from 10 in 2024 to a central estimate of 8.2 (95% range 3.7–13). A 5-year backtest shows a typical error of ±19.2%, with 100% of held-out values landing inside the 95% band.

-20%Change by 2029

8.2Projected 2029 index

3.7–1395% range

±19.2%Backtest error

Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.

Year	Projected index	95% low	95% high
2025	8.2	3.7	13
2026	8.2	3.7	13
2027	8.2	3.7	13
2028	8.2	3.7	13
2029	8.2	3.7	13

Member Species In Idaho

Arid-land birds species in Idaho.

Black-throated Sparrow	Passerellidae	-40%
Brewer's Sparrow	Passerellidae	-13%
Sage Thrasher	Mimidae	+106%
Sagebrush Sparrow	Passerellidae	+364%

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