BirdAnalyst
Species · Arizona · BBS 2025 Release · 1966–2024

Western Grebe Population Trend in Arizona

All statesWetland birds

Western Grebe in Arizona has edged down: down 11% on the route-weighted index since 1999.

-11%Since 1999
4Routes In State
20Years

Notable Western Grebe Trends in Arizona

No notable trend signals for Western Grebe in Arizona. See the full index history below.

Western Grebe Population Forecast in Arizona

If the recent trend holds, Western Grebe in Arizona is projected to stay roughly flat through 2028, near 0.10 (95% range 0.00–0.26). A 5-year backtest shows a typical error of ±355.1%, with 60% of held-out values landing inside the 95% band.

n/aChange by 2028
0.10Projected 2028 index
0.00–0.2695% range
±355.1%Backtest error
19962028
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
20240.100.000.26
20250.100.000.26
20260.100.000.26
20270.100.000.26
20280.100.000.26

Western Grebe Survey Routes in Arizona

Routes recording Western Grebe in Arizona.
Carr Mtn820112005
Cibola Lake420171996
Araby120211998
Alamo Res.120232017

Western Grebe Population Trend in Other States

californiacoloradoidahokansasminnesotamontananebraskanevadanew-mexiconorth-dakotaoregonsouth-dakotautahwashingtonwyoming

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