BirdAnalyst
Species · BCR 17 · BBS 2025 Release · 1966–2024

Northern Harrier In Badlands and Prairies

All regionsBadlands and PrairiesGeneralists

Northern Harrier in Badlands and Prairies has declined: down 44% on the route-weighted index since 1969.

-44%Since 1969
115Routes In Region
57Years

Notable Signals

No notable trend signals for Northern Harrier in Badlands and Prairies. See the full index history below.

Forecast

If the recent trend holds, Northern Harrier in Badlands and Prairies is projected to fall about 41% by 2029 — from 1.3 in 2024 to a central estimate of 0.74 (95% range 0.00–1.6). A 5-year backtest shows a typical error of ±32.1%, with 100% of held-out values landing inside the 95% band.

-41%Change by 2029
0.74Projected 2029 index
0.00–1.695% range
±32.1%Backtest error
19672029
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
20250.800.001.6
20260.780.001.6
20270.770.001.6
20280.760.001.6
20290.740.001.6

Routes In Badlands and Prairies

Routes recording Northern Harrier in Badlands and Prairies.
Two DotMONTANA92024
GorhamNORTH-DAKOTA52018
SolenNORTH-DAKOTA52024
CircleMONTANA42023
ShawmutMONTANA42024
Wheat BasinMONTANA42024
Chuffey SpringMONTANA42024
CarsonNORTH-DAKOTA42024
HardingSOUTH-DAKOTA42019
RevaSOUTH-DAKOTA42024
LodgepoleSOUTH-DAKOTA42023
SussexWYOMING42016
ShawneeWYOMING42003
Gvnt ValleyWYOMING42019
JordanMONTANA32017
LindsayMONTANA32024
CrookstonNEBRASKA32019
Oglala Nat. Grass.NEBRASKA32015
LarkNORTH-DAKOTA31986
ZapNORTH-DAKOTA32024
Fort PierreSOUTH-DAKOTA32024
MaurineSOUTH-DAKOTA32024
HighwoodMONTANA22024
RoyMONTANA22024
BrusettMONTANA22024

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