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

Common Grackle Population Trend in Indiana

All statesGeneralists

Common Grackle in Indiana has fallen sharply: down 62% on the route-weighted index since 1968.

-62%Since 1968
69Routes In State
58Years

Notable Common Grackle Trends in Indiana

long arc declinecomputed index

Common Grackle has fallen sharply in Indiana: down 62% on the route-weighted index since 1968.

Common Grackle Population Forecast in Indiana

If the recent trend holds, Common Grackle in Indiana is projected to stay roughly flat through 2029, near 38 (95% range 0.00–90). A 5-year backtest shows a typical error of ±85.8%, with 100% of held-out values landing inside the 95% band.

+2%Change by 2029
38Projected 2029 index
0.00–9095% range
±85.8%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
2025440.0095
2026420.0094
2027410.0092
2028400.0091
2029380.0090

Common Grackle Survey Routes in Indiana

Routes recording Common Grackle in Indiana.
Milroy41420241966
Plainfield17119991999
Tipton14319921966
Cross Plains13620241999
South Bend12019911966
Witts Station10420242000
Shelbyville9720241983
Hebron8920221966
Scottsburg7820241982
Brookville7720241966
W Lafayette7520241981
Muncie6719971981
Maplewood6620212000
Decatur5920241999
Newberry5920241999
Packertown5820041967
Portage5520042000
Middletown5420241966
Sexton5220241981
Cyprss4720241999
Monticello4220241981
New Brunswick4220242024
Millersburg4120241981
Middlebury3920241989
Kokomo3920241993

Common Grackle Population Trend in Other States

alabamaarkansascoloradoconnecticutdelawarefloridageorgiaidahoillinoisiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawest-virginiawisconsinwyoming

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