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

Brown Thrasher Population Trend in Indiana

All statesGeneralists

Brown Thrasher in Indiana has declined: down 49% on the route-weighted index since 1968.

-49%Since 1968
69Routes In State
58Years

Notable Brown Thrasher Trends in Indiana

No notable trend signals for Brown Thrasher in Indiana. See the full index history below.

Brown Thrasher Population Forecast in Indiana

If the recent trend holds, Brown Thrasher in Indiana is projected to stay roughly flat through 2029, near 2.5 (95% range 1.1–3.8). A 5-year backtest shows a typical error of ±16.3%, with 100% of held-out values landing inside the 95% band.

-3%Change by 2029
2.5Projected 2029 index
1.1–3.895% range
±16.3%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
20252.61.33.9
20262.61.33.9
20272.51.23.9
20282.51.23.8
20292.51.13.8

Brown Thrasher Survey Routes in Indiana

Routes recording Brown Thrasher in Indiana.
Wallace1220241999
Georgia1120241999
Pimento820241981
Jamestown820241986
Spencer620241967
Kankakee Sands620242000
Brazil520241966
Azalia520241982
Indian Spgs520241982
Celestine520241979
Frankfort520221999
Newberry520241999
Packertown420041967
Thorntown420241982
Millersburg420191981
New Phila420241982
Ellis320231966
Fowler320241966
Muncie319971981
Friendswood320241986
Washington320241987
Corydon320241966
Scottsburg320241982
Montpelier320242018
Cyprss320241999

Brown Thrasher Population Trend in Other States

alabamaarkansascoloradoconnecticutdelawarefloridageorgiaillinoisiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsinwyoming

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