BirdAnalyst
Species · BCR 12 · BBS 2025 Release · 1966–2024

Bald Eagle In Boreal Hardwood Transition

All regionsBoreal Hardwood TransitionGeneralists

Bald Eagle in Boreal Hardwood Transition has surged: up 765% on the route-weighted index since 1977.

+765%Since 1977
88Routes In Region
47Years

Notable Signals

long arc increasecomputed index

Bald Eagle has surged in Boreal Hardwood Transition: up 765% on the route-weighted index since 1977.

Forecast

If the recent trend holds, Bald Eagle in Boreal Hardwood Transition is projected to fall about 12% by 2029 — from 0.36 in 2024 to a central estimate of 0.32 (95% range 0.24–0.39). A 5-year backtest shows a typical error of ±25.5%, with 80% of held-out values landing inside the 95% band.

-12%Change by 2029
0.32Projected 2029 index
0.24–0.3995% range
±25.5%Backtest error
19742029
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
20250.290.220.37
20260.300.220.38
20270.310.230.38
20280.310.230.39
20290.320.240.39

Routes In Boreal Hardwood Transition

Routes recording Bald Eagle in Boreal Hardwood Transition.
Wigwam BayMINNESOTA32023
BabbittMINNESOTA32016
Tamarac NwrMINNESOTA32023
RhinelanderWISCONSIN32021
Lake CityMICHIGAN22010
SkeelsMICHIGAN22007
OberlinMICHIGAN22024
CathroMICHIGAN22012
Seney NwrMICHIGAN22010
CromwellMINNESOTA22024
Pine RiverMINNESOTA22024
FloodwoodMINNESOTA22019
LudeMINNESOTA22022
BrainerdMINNESOTA22024
BlackduckMINNESOTA22022
GlendaleMINNESOTA22022
WarroadMINNESOTA22024
GreenbushMINNESOTA22021
NebishMINNESOTA22023
Nett LakeMINNESOTA22021
GilmanWISCONSIN22024
WausaukeeWISCONSIN22013
Washington IWISCONSIN22024
OntonagonMICHIGAN12019
BerglandMICHIGAN12019

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