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Species · Michigan · BBS 2025 Release · 1966–2024

Bobolink Population Trend in Michigan

All statesGrassland birds

Bobolink in Michigan has collapsed: down 82% on the route-weighted index since 1968.

-82%Since 1968
93Routes In State
58Years

Notable Bobolink Trends in Michigan

long arc declinecomputed index

Bobolink has collapsed in Michigan: down 82% on the route-weighted index since 1968.

Bobolink Population Forecast in Michigan

If the recent trend holds, Bobolink in Michigan is projected to fall about 100% by 2029 — from 2.4 in 2024 to a central estimate of 0.00 (95% range 0.00–3.6). A 5-year backtest shows a typical error of ±60.2%, with 100% of held-out values landing inside the 95% band.

-100%Change by 2029
0.00Projected 2029 index
0.00–3.695% range
±60.2%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
20250.320.003.9
20260.070.003.6
20270.000.003.6
20280.000.003.6
20290.000.003.6

Bobolink Survey Routes in Michigan

Routes recording Bobolink in Michigan.
Pickford6020241973
Ontonagon1620191967
Lake City1520151970
Hungerford1520241991
Pleasant Val1219971967
Ola1220241974
Hubbard Lake1219961973
Cunard1120211973
Big Rapids1119901967
Cathro1120161967
Tyre1019961967
Herron1020162011
Pettysville919791969
Riggsville820191967
Drayton Plns819871973
Allegan Wma820191993
Maple Rapids720191987
Skegemog Pt620141974
Frederic620031971
S Lyons619921968
Adrian520171966
Pleasant Valley 2520242004
Richmond520171999
New Buffalo420131994
Muskallonge320071966

Bobolink Population Trend in Other States

californiacoloradoconnecticutidahoillinoisindianaiowakansaskentuckymainemarylandmassachusettsminnesotamissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooregonpennsylvaniarhode-islandsouth-dakotautahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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