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

Sooty Grouse In Northern Pacific Rainforest

All regionsNorthern Pacific RainforestGeneralists

Sooty Grouse in Northern Pacific Rainforest has risen sharply: up 72% on the route-weighted index since 1970.

+72%Since 1970
81Routes In Region
56Years

Notable Signals

long arc increasecomputed index

Sooty Grouse has risen sharply in Northern Pacific Rainforest: up 72% on the route-weighted index since 1970.

Forecast

If the recent trend holds, Sooty Grouse in Northern Pacific Rainforest is projected to stay roughly flat through 2029, near 0.94 (95% range 0.49–1.4). A 5-year backtest shows a typical error of ±15.9%, with 100% of held-out values landing inside the 95% band.

-3%Change by 2029
0.94Projected 2029 index
0.49–1.495% range
±15.9%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
20250.890.451.3
20260.900.461.3
20270.910.471.4
20280.920.481.4
20290.940.491.4

Routes In Northern Pacific Rainforest

Routes recording Sooty Grouse in Northern Pacific Rainforest.
Zimovia StrtALASKA202024
HainesALASKA162024
Mitkof IsleALASKA112024
Kuiu IslandALASKA82010
Mt. AdamsWASHINGTON82023
SkagwayALASKA52024
TimberOREGON52017
CinderellaOREGON52024
CougarWASHINGTON52023
HyderALASKA42009
Wrangell (Short)ALASKA41984
Warner Mtn.OREGON42024
PackwoodWASHINGTON42011
Rio DellCALIFORNIA31973
KorbelCALIFORNIA31991
Cool CampOREGON32013
Myrtle GroveOREGON32015
Mt RainierWASHINGTON32021
ZaremboALASKA22014
Chichagof IsALASKA22024
Junction CtyCALIFORNIA21982
HiouchiCALIFORNIA22014
Friday RidgeCALIFORNIA22023
Pilot CreekCALIFORNIA21996
WedderburnOREGON22019

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