BirdAnalyst
Species · BCR 28 · BBS 2026 Release · 1966–2025

Bald Eagle In Appalachian Mountains

All regionsAppalachian MountainsBirds of prey

Bald Eagle in Appalachian Mountains has surged: up 12× on the route-weighted index since 1982.

12×Since 1982TrendPercent 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 →
113Routes 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 →
39YearsYears 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 Appalachian Mountains. See the full index history below.

Bald Eagle In Appalachian Mountains Population Forecast

If the recent trend holds, Bald Eagle in Appalachian Mountains is projected to fall about 18% by 2030 — from 0.12 in 2025 to a central estimate of 0.10 (95% range 0.05–0.15). A 5-year backtest shows a typical error of ±58.2%, with 0% of held-out values landing inside the 95% band.

-18%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 →
0.10Projected 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 →
0.05–0.1595% 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 →
±58.2%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 Appalachian Mountains is projected to fall about 18% by 2030 — from 0.12 in 2025 to a central estimate of 0.10 (95% range 0.05–0.15). A 5-year backtest shows a typical error of ±58.2%, with 0% of held-out values landing inside the 95% band.19772030
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 →
20260.090.040.14
20270.090.040.14
20280.090.040.14
20290.100.050.15
20300.100.050.15

Routes In Appalachian Mountains

Routes recording Bald Eagle in Appalachian Mountains.
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 →
Lost RiverWEST-VIRGINIA52021
WaterstreetPENNSYLVANIA42024
WilliamsportMARYLAND32024
CobleskillNEW-YORK32023
Brunnerville 2PENNSYLVANIA32024
Mo Of SenecaWEST-VIRGINIA32023
WolfsvilleMARYLAND22025
MidvaleNEW-JERSEY22006
Platte CoveNEW-YORK22012
Phillips CrNEW-YORK22015
DownsvilleNEW-YORK22019
PottersdalePENNSYLVANIA22023
RasselasPENNSYLVANIA22007
ArnotPENNSYLVANIA22025
Little MarshPENNSYLVANIA22015
MargaretPENNSYLVANIA22024
GeeseytownPENNSYLVANIA22025
Starlight 2PENNSYLVANIA22025
ElizabethvilPENNSYLVANIA22021
Pine GroveALABAMA12024
Smyer LakeALABAMA12024
GuntersvilleALABAMA12014
MentoneALABAMA12023
StevensonALABAMA12024
RiversideALABAMA12012

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