BirdAnalyst
Species · BCR 9 · BBS 2025 Release · 1966–2024

Northern Harrier In Great Basin

All regionsGreat BasinGeneralists

Northern Harrier in Great Basin has edged up: up 10% on the route-weighted index since 1970.

+10%Since 1970
214Routes In Region
56Years

Notable Signals

No notable trend signals for Northern Harrier in Great Basin. See the full index history below.

Forecast

If the recent trend holds, Northern Harrier in Great Basin is projected to stay roughly flat through 2029, near 0.98 (95% range 0.41–1.5). A 5-year backtest shows a typical error of ±49.9%, with 80% of held-out values landing inside the 95% band.

-5%Change by 2029
0.98Projected 2029 index
0.41–1.595% range
±49.9%Backtest error
19682029
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
20250.970.411.5
20260.970.411.5
20270.970.411.5
20280.980.411.5
20290.980.411.5

Routes In Great Basin

Routes recording Northern Harrier in Great Basin.
SnowvilleUTAH142024
HikoNEVADA92016
Flook LakeOREGON92024
PromontoryUTAH92024
DorrisCALIFORNIA82019
MidasNEVADA82012
Walla WallaWASHINGTON81993
Ruby Valley 2NEVADA72024
PrincetonOREGON61985
PomonaWASHINGTON61999
DuboisIDAHO52024
PendletonOREGON52024
Blitzen 2OREGON52024
WilburWASHINGTON52021
Davis CreekCALIFORNIA41998
LeadoreIDAHO42024
Glenns FerryIDAHO41986
Harney LakeOREGON42024
Warner VallyOREGON42024
Bowden HillsOREGON42024
Johnson CanUTAH42024
Goose Creek Mtn.UTAH42009
EwanWASHINGTON42019
PotholesWASHINGTON42019
IngallsCALIFORNIA32000

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