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

Arid-land Birds In Colorado

All statesColorado

4 species in this guild. As a group they are -12% since 1974.

Guild Signals

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

Forecast

If the recent trend holds, Arid-land birds in Colorado is projected to fall about 47% by 2029 — from 0.11 in 2024 to a central estimate of 0.06 (95% range 0.00–0.14). A 5-year backtest shows a typical error of ±34.2%, with 100% of held-out values landing inside the 95% band.

-47%Change by 2029
0.06Projected 2029 index
0.00–0.1495% range
±34.2%Backtest error
19722029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected index95% low95% high
20250.060.000.14
20260.060.000.14
20270.060.000.14
20280.060.000.14
20290.060.000.14

Member Species In Colorado

Arid-land birds species in Colorado.
Greater RoadrunnerCuculidae-76%
Black-throated SparrowPasserellidae+37%
Curve-billed ThrasherMimidae+46%
Gambel's QuailOdontophoridae+135%

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