BirdAnalyst
Species · BCR 5 · BBS 2025 Release · 1966–2024

Northern Harrier In Northern Pacific Rainforest

All regionsNorthern Pacific RainforestGeneralists

Northern Harrier in Northern Pacific Rainforest has surged: up 94% on the route-weighted index since 1973.

+94%Since 1973
43Routes In Region
51Years

Notable Signals

long arc increasecomputed index

Northern Harrier has surged in Northern Pacific Rainforest: up 94% on the route-weighted index since 1973.

Forecast

If the recent trend holds, Northern Harrier in Northern Pacific Rainforest is projected to fall about 14% by 2029 — from 0.16 in 2024 to a central estimate of 0.14 (95% range 0.06–0.22). A 5-year backtest shows a typical error of ±125.2%, with 80% of held-out values landing inside the 95% band.

-14%Change by 2029
0.14Projected 2029 index
0.06–0.2295% range
±125.2%Backtest error
19712029
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
20250.130.050.21
20260.130.050.21
20270.130.060.21
20280.140.060.21
20290.140.060.22

Routes In Northern Pacific Rainforest

Routes recording Northern Harrier in Northern Pacific Rainforest.
YrekaCALIFORNIA52019
McminnvilleOREGON42024
AdairOREGON32024
CordovaALASKA22009
Mitkof IsleALASKA22002
Bodega BayCALIFORNIA22021
CanbyOREGON22017
SalemOREGON22024
Bay ViewWASHINGTON22017
Mendota 2WASHINGTON21994
Thompson PasALASKA12023
Sheep MtnALASKA12014
Copper RiverALASKA12009
Crescent CtyCALIFORNIA11979
HoneydewCALIFORNIA12005
Martins FyCALIFORNIA11977
Rio DellCALIFORNIA11996
Mt ShastaCALIFORNIA11995
GazelleCALIFORNIA11991
UmpquaOREGON12018
WinberryOREGON12023
ScioOREGON12024
DaytonOREGON12015
GarfieldOREGON12013
ElktonOREGON12024

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