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

Swamp Sparrow Population Trend in Michigan

All statesGeneralists

Swamp Sparrow in Michigan has surged: up 449% on the route-weighted index since 1968.

+449%Since 1968
92Routes In State
58Years

Notable Swamp Sparrow Trends in Michigan

long arc increasecomputed index

Swamp Sparrow has surged in Michigan: up 449% on the route-weighted index since 1968.

Swamp Sparrow Population Forecast in Michigan

If the recent trend holds, Swamp Sparrow in Michigan is projected to rise about 15% by 2029 — from 2.4 in 2024 to a central estimate of 2.8 (95% range 1.8–3.7). A 5-year backtest shows a typical error of ±26.6%, with 80% of held-out values landing inside the 95% band.

+15%Change by 2029
2.8Projected 2029 index
1.8–3.795% range
±26.6%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
20252.61.73.6
20262.71.73.7
20272.71.73.7
20282.71.73.7
20292.81.83.7

Swamp Sparrow Survey Routes in Michigan

Routes recording Swamp Sparrow in Michigan.
Muskallonge1120241977
Chippewa Lk.1020241992
Ned Lake720241986
Brocky Lake720241980
Seney Nwr720241992
Nashville620241968
Galesburg620241966
Howardsville620241971
Pettysville619791969
Marenisco520191981
Herman520151983
Tahquamenon520241974
Walloon Lake 2520242005
Lapeer520242000
Pine River520181992
Lawrence420241974
Pleasant Val419911986
Hubbard Lake419931974
Hamburg420011981
Almena420151993
Gibbs City320241982
Maple Grove320241974
Cunard320181981
Belding320001983
Mottville320241969

Swamp Sparrow Population Trend in Other States

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

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