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

Bald Eagle Population Trend in Maine

All statesGeneralists

Bald Eagle in Maine has surged: up 575% on the route-weighted index since 1997.

+575%Since 1997
23Routes In State
25Years

Notable Bald Eagle Trends in Maine

long arc increasecomputed index

Bald Eagle has surged in Maine: up 575% on the route-weighted index since 1997.

Bald Eagle Population Forecast in Maine

If the recent trend holds, Bald Eagle in Maine is projected to rise about 35% by 2029 — from 0.10 in 2024 to a central estimate of 0.14 (95% range 0.01–0.27). A 5-year backtest shows a typical error of ±56.6%, with 20% of held-out values landing inside the 95% band.

+35%Change by 2029
0.14Projected 2029 index
0.01–0.2795% range
±56.6%Backtest error
19802029
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
20250.130.000.26
20260.130.000.26
20270.140.010.26
20280.140.010.27
20290.140.010.27

Bald Eagle Survey Routes in Maine

Routes recording Bald Eagle in Maine.
Kittery Pt220232019
Greenwood220012001
Turner 2220242024
Wilson Mills120232008
Hartford120171997
Harmony120132013
Hermon120052005
Brownfield 2120232023
Cooper120211980
Carrying Pl120192019
Carrabassett120232018
Charleston120072007
Seboomook Lk120052005
Medway120181998
Clayton Lake119991999
Lake Moxie120132012
Ashland120062006
Cornville120232021
Searsport120222022
Baker Lake120002000
Rome120122012
Jefferson119961996
Church Hill120142014

Bald Eagle Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniasouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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