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

Bald Eagle Population Trend in Delaware

All statesGeneralists

Bald Eagle in Delaware has surged: up 34× on the route-weighted index since 1997.

34×Since 1997
12Routes In State
28Years

Notable Bald Eagle Trends in Delaware

long arc increasecomputed index

Bald Eagle has surged in Delaware: up 34× on the route-weighted index since 1997.

Bald Eagle Population Forecast in Delaware

If the recent trend holds, Bald Eagle in Delaware is projected to fall about 21% by 2029 — from 4.4 in 2024 to a central estimate of 3.5 (95% range 2.0–4.9). A 5-year backtest shows a typical error of ±51.6%, with 0% of held-out values landing inside the 95% band.

-21%Change by 2029
3.5Projected 2029 index
2.0–4.995% range
±51.6%Backtest error
19922029
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
20253.01.54.4
20263.11.74.6
20273.21.84.7
20283.31.94.8
20293.52.04.9

Bald Eagle Survey Routes in Delaware

Routes recording Bald Eagle in Delaware.
Harrington520241992
Millsboro520242017
Holleyville 2520242009
Pepperbox 2520242017
Frankford420122007
Mt Pleasant220182006
Blackbird220241996
Wilmington120042004
Milton120142006
Pepperbox120162000
Georgetown120212016
Milton 2120172017

Bald Eagle Population Trend in Other States

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

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