BirdAnalyst
Species · BCR 30 · BBS 2026 Release · 1966–2025

Bald Eagle In New England / Mid-Atlantic Coast

All regionsNew England / Mid-Atlantic CoastBirds of prey

Bald Eagle in New England / Mid-Atlantic Coast has surged: up 66× on the route-weighted index since 1968.

66×Since 1968TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
70Routes In RegionSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
55YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable SignalsNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

No notable trend signals for Bald Eagle in New England / Mid-Atlantic Coast. See the full index history below.

Bald Eagle In New England / Mid-Atlantic Coast Population Forecast

If the recent trend holds, Bald Eagle in New England / Mid-Atlantic Coast is projected to stay roughly flat through 2030, near 1.0 (95% range 0.62–1.4). A 5-year backtest shows a typical error of ±34.5%, with 20% of held-out values landing inside the 95% band.

-10%Change by 2030TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
1.0Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.62–1.495% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±34.5%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, Bald Eagle in New England / Mid-Atlantic Coast is projected to stay roughly flat through 2030, near 1.0 (95% range 0.62–1.4). A 5-year backtest shows a typical error of ±34.5%, with 20% of held-out values landing inside the 95% band.19662030
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
20260.940.541.3
20270.960.561.4
20280.980.581.4
20291.00.601.4
20301.00.621.4

Routes In New England / Mid-Atlantic Coast

Routes recording Bald Eagle in New England / Mid-Atlantic Coast.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →
HongaMARYLAND192025
HarmonyMARYLAND172017
ViennaMARYLAND72025
CokesburyMARYLAND72025
Chincoteag WVIRGINIA72024
HarringtonDELAWARE62025
MillsboroDELAWARE52024
Holleyville 2DELAWARE52024
MelitotaMARYLAND52025
MadisonMARYLAND52025
IndiantownMARYLAND52014
FrankfordDELAWARE42012
MatthewsMARYLAND42025
St. George'S IslandMARYLAND42017
Pepperbox 2DELAWARE32025
Tall TimbersMARYLAND32013
MillingtonMARYLAND32024
Golden HillMARYLAND32025
GloucesterVIRGINIA32025
Mt PleasantDELAWARE22018
FredericaDELAWARE22025
Kittery PtMAINE22023
PomfretMARYLAND22024
EastonMARYLAND22025
MardelaMARYLAND22019

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.