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Species · Tennessee · BBS 2025 Release · 1966–2024

Grasshopper Sparrow Population Trend in Tennessee

All statesGrassland birds

Grasshopper Sparrow in Tennessee has collapsed: down 89% on the route-weighted index since 1968.

-89%Since 1968
35Routes In State
58Years

Notable Grasshopper Sparrow Trends in Tennessee

long arc declinecomputed index

Grasshopper Sparrow has collapsed in Tennessee: down 89% on the route-weighted index since 1968.

Grasshopper Sparrow Population Forecast in Tennessee

If the recent trend holds, Grasshopper Sparrow in Tennessee is projected to rise about 278% by 2029 — from 0.09 in 2024 to a central estimate of 0.34 (95% range 0.00–0.95). A 5-year backtest shows a typical error of ±275.1%, with 100% of held-out values landing inside the 95% band.

+278%Change by 2029
0.34Projected 2029 index
0.00–0.9595% range
±275.1%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
20250.380.000.99
20260.370.000.98
20270.360.000.97
20280.350.000.96
20290.340.000.95

Grasshopper Sparrow Survey Routes in Tennessee

Routes recording Grasshopper Sparrow in Tennessee.
Campbellsville419921967
Allens Brdge420231966
Belotes Bend319911966
Corryton Rd320191966
Pawpaw 2320172013
Tiptonville220092007
Sweetlips220171972
Petersburg220131982
Glen220241966
Climer220041967
Jefferson Cty220111966
Pawpaw120111982
Jones Gap120192001
Brownsville120042003
Tibbs120071980
Whiteville120071988
Big Sandy120162002
Mansfield120141981
Silerton119991990
Newfound Gap119911991
Humboldt119711968
Indian Mound119781978
Collinwood120041969
Wrigley119941979
Lewis Forest120091966

Grasshopper Sparrow Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniasouth-carolinasouth-dakotatexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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