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

Northern Harrier In Boreal Hardwood Transition

All regionsBoreal Hardwood TransitionGeneralists

Northern Harrier in Boreal Hardwood Transition has declined: down 42% on the route-weighted index since 1968.

-42%Since 1968
87Routes In Region
58Years

Notable Signals

No notable trend signals for Northern Harrier in Boreal Hardwood Transition. See the full index history below.

Forecast

If the recent trend holds, Northern Harrier in Boreal Hardwood Transition is projected to rise about 123% by 2029 — from 0.09 in 2024 to a central estimate of 0.21 (95% range 0.01–0.41). A 5-year backtest shows a typical error of ±107.1%, with 100% of held-out values landing inside the 95% band.

+123%Change by 2029
0.21Projected 2029 index
0.01–0.4195% range
±107.1%Backtest error
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 index95% low95% high
20250.210.010.41
20260.210.010.41
20270.210.010.41
20280.210.010.41
20290.210.010.41

Routes In Boreal Hardwood Transition

Routes recording Northern Harrier in Boreal Hardwood Transition.
Wigwam BayMINNESOTA32023
Crystal FlsMICHIGAN21992
SkeelsMICHIGAN21989
Beaver LakeMICHIGAN21970
Hubbard LakeMICHIGAN21993
Seney NwrMICHIGAN22018
Island LakeMINNESOTA22017
DebsMINNESOTA22019
WaskishMINNESOTA22021
McgregorMINNESOTA22021
BrainerdMINNESOTA22024
BagleyMINNESOTA22006
Nett LakeMINNESOTA22018
BayfieldWISCONSIN22019
PhillipsWISCONSIN22022
OntonagonMICHIGAN11967
BootjackMICHIGAN12009
Ned LakeMICHIGAN11988
Gibbs CityMICHIGAN12006
Maple GroveMICHIGAN12024
IshpemingMICHIGAN11981
Brocky LakeMICHIGAN12018
WilsonMICHIGAN12009
CunardMICHIGAN11994
ShingletonMICHIGAN12005

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