BirdAnalyst
Species · BCR 30 · BBS 2025 Release · 1966–2024

Bald Eagle In New England / Mid-Atlantic Coast

All regionsNew England / Mid-Atlantic CoastGeneralists

Bald Eagle in New England / Mid-Atlantic Coast has surged: up 68× on the route-weighted index since 1968.

68×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 →
68Routes 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 →
54YearsYears 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 →

long arc increasecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Bald Eagle has surged in New England / Mid-Atlantic Coast: up 68× on the route-weighted index since 1968.

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 fall about 36% by 2029 — from 1.5 in 2024 to a central estimate of 0.99 (95% range 0.58–1.4). A 5-year backtest shows a typical error of ±41.7%, with 20% of held-out values landing inside the 95% band.

-36%Change by 2029TrendPercent 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 →
0.99Projected 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.58–1.495% 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 →
±41.7%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 fall about 36% by 2029 — from 1.5 in 2024 to a central estimate of 0.99 (95% range 0.58–1.4). A 5-year backtest shows a typical error of ±41.7%, with 20% of held-out values landing inside the 95% band.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 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 →
20250.910.501.3
20260.930.521.3
20270.950.541.4
20280.970.561.4
20290.990.581.4

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 →
CokesburyMARYLAND182024
HarmonyMARYLAND172017
MadisonMARYLAND172024
MelitotaMARYLAND162024
HongaMARYLAND122024
Chincoteag WVIRGINIA72024
HarringtonDELAWARE52024
MillsboroDELAWARE52024
Holleyville 2DELAWARE52024
Pepperbox 2DELAWARE52024
IndiantownMARYLAND52014
FrankfordDELAWARE42012
ViennaMARYLAND42024
St. George'S IslandMARYLAND42017
Tall TimbersMARYLAND32013
MillingtonMARYLAND32024
Mt PleasantDELAWARE22018
BlackbirdDELAWARE22024
Kittery PtMAINE22023
PomfretMARYLAND22024
MatthewsMARYLAND22024
MardelaMARYLAND22019
FriendshipNEW-JERSEY22023
PedricktownNEW-JERSEY22012
Bennett Mill 2NEW-JERSEY22024

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