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

Bald Eagle Population Trend in Wisconsin

All statesGeneralists

Bald Eagle in Wisconsin has surged: up 17× on the route-weighted index since 1979.

17×Since 1979
87Routes In State
46Years

Notable Bald Eagle Trends in Wisconsin

long arc increasecomputed index

Bald Eagle has surged in Wisconsin: up 17× on the route-weighted index since 1979.

Bald Eagle Population Forecast in Wisconsin

If the recent trend holds, Bald Eagle in Wisconsin is projected to fall about 27% by 2029 — from 0.64 in 2024 to a central estimate of 0.47 (95% range 0.33–0.61). A 5-year backtest shows a typical error of ±29.7%, with 80% of held-out values landing inside the 95% band.

-27%Change by 2029
0.47Projected 2029 index
0.33–0.6195% range
±29.7%Backtest error
19752029
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
20250.430.290.57
20260.440.300.58
20270.450.310.59
20280.460.320.60
20290.470.330.61

Bald Eagle Survey Routes in Wisconsin

Routes recording Bald Eagle in Wisconsin.
Cochrane420241989
Omro419961996
Merrill320241992
Mather320231998
Casco320242005
Rolling Grnd320242018
Rhinelander320211999
Hudson220241995
Dresser220241992
Loraine220181984
Gilman220241996
Wausaukee220132013
Washington I220242001
Trempealeau220242003
Wis Rapids220231983
Manawa220161999
New Lisbon220242010
Kendall220232007
Pigeon Creek220242012
Buena Vista220222014
Gresham220242013
Highland220242006
Briggsville220192006
Iron River120242000
Minong120231983

Bald Eagle Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniasouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawyoming

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