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

Grasshopper Sparrow Population Trend in Arizona

All statesGrassland birds

Grasshopper Sparrow in Arizona has declined: down 40% on the route-weighted index since 1970.

-40%Since 1970
7Routes In State
52Years

Notable Grasshopper Sparrow Trends in Arizona

No notable trend signals for Grasshopper Sparrow in Arizona. See the full index history below.

Grasshopper Sparrow Population Forecast in Arizona

If the recent trend holds, Grasshopper Sparrow in Arizona is projected to stay roughly flat through 2029, near 0.09 (95% range 0.00–0.48). A 5-year backtest shows a typical error of ±71.9%, with 100% of held-out values landing inside the 95% band.

+2%Change by 2029
0.09Projected 2029 index
0.00–0.4895% range
±71.9%Backtest error
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 index95% low95% high
20250.110.000.50
20260.110.000.50
20270.100.000.49
20280.090.000.49
20290.090.000.48

Grasshopper Sparrow Survey Routes in Arizona

Routes recording Grasshopper Sparrow in Arizona.
Patagonia320241968
Sunizona219961986
Round Rock219711971
Rucker220091995
Sunizona 2120192005
Red Rock119971995
Amado120192019

Grasshopper Sparrow Population Trend in Other States

alabamaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniasouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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