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

Swamp Sparrow Population Trend in Indiana

All statesGeneralists

Swamp Sparrow in Indiana has fallen sharply: down 72% on the route-weighted index since 1975.

-72%Since 1975
17Routes In State
51Years

Notable Swamp Sparrow Trends in Indiana

long arc declinecomputed index

Swamp Sparrow has fallen sharply in Indiana: down 72% on the route-weighted index since 1975.

Swamp Sparrow Population Forecast in Indiana

If the recent trend holds, Swamp Sparrow in Indiana is projected to stay roughly flat through 2029, near 0.06 (95% range 0.00–0.34). A 5-year backtest shows a typical error of ±33.5%, with 100% of held-out values landing inside the 95% band.

+5%Change by 2029
0.06Projected 2029 index
0.00–0.3495% range
±33.5%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
20250.070.000.35
20260.070.000.35
20270.070.000.34
20280.060.000.34
20290.060.000.34

Swamp Sparrow Survey Routes in Indiana

Routes recording Swamp Sparrow in Indiana.
Lagrange320091999
Gary219871980
Hebron219851970
Lakeville220232023
Packertown219931993
South Bend119841982
Portage120002000
Middlebury120241990
Ellis120231966
Portage 2120222014
Indiana Dune120241994
Crown Point120132013
Laporte120232023
Tipton119791979
Cuba120192017
Wabash120092009
Berne120242024

Swamp Sparrow Population Trend in Other States

connecticutdelawareillinoisiowamainemarylandmassachusettsmichiganminnesotanebraskanew-hampshirenew-jerseynew-yorknorth-dakotaohiopennsylvaniarhode-islandsouth-dakotavermontvirginiawest-virginiawisconsin

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