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Species · Indiana · BBS 2025 Release · 1966–2024

Grasshopper Sparrow Population Trend in Indiana

All statesGrassland birds

Grasshopper Sparrow in Indiana has collapsed: down 95% on the route-weighted index since 1968.

-95%Since 1968
60Routes In State
58Years

Notable Grasshopper Sparrow Trends in Indiana

long arc declinecomputed index

Grasshopper Sparrow has collapsed in Indiana: down 95% on the route-weighted index since 1968.

Grasshopper Sparrow Population Forecast in Indiana

If the recent trend holds, Grasshopper Sparrow in Indiana is projected to fall about 100% by 2029 — from 0.67 in 2024 to a central estimate of 0.00 (95% range 0.00–3.5). A 5-year backtest shows a typical error of ±199.5%, with 100% of held-out values landing inside the 95% band.

-100%Change by 2029
0.00Projected 2029 index
0.00–3.595% range
±199.5%Backtest error
19662029
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
20250.000.003.5
20260.000.003.5
20270.000.003.5
20280.000.003.5
20290.000.003.5

Grasshopper Sparrow Survey Routes in Indiana

Routes recording Grasshopper Sparrow in Indiana.
Kankakee Sands1720242000
Newberry920241999
Gary819841984
Thorntown420221983
Muncie319971996
Sexton320231983
Shelbyville320211985
Cumback320161966
Vevay320011966
Scottsburg320141982
Evansville320141966
Crown Point320011999
Lagrange320241999
Middlebury220191989
Columbia Cty220221985
Packertown220041967
Ellis220161966
Fowler220101966
Middletown220161966
Swayzee220141981
Jamestown220071986
Spencer220181967
Clear Spring220121982
Decatur220241999
New Castle220242002

Grasshopper Sparrow Population Trend in Other States

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

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