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Species · Alaska · BBS 2025 Release · 1966–2024

Sooty Grouse Population Trend in Alaska

All statesGeneralists

Sooty Grouse in Alaska has collapsed: down 86% on the route-weighted index since 1975.

-86%Since 1975
15Routes In State
44Years

Notable Sooty Grouse Trends in Alaska

long arc declinecomputed index

Sooty Grouse has collapsed in Alaska: down 86% on the route-weighted index since 1975.

Sooty Grouse Population Forecast in Alaska

If the recent trend holds, Sooty Grouse in Alaska is projected to fall about 100% by 2029 — from 0.82 in 2024 to a central estimate of 0.00 (95% range 0.00–2.3). A 5-year backtest shows a typical error of ±151.5%, with 100% of held-out values landing inside the 95% band.

-100%Change by 2029
0.00Projected 2029 index
0.00–2.395% range
±151.5%Backtest error
19722029
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
20250.000.002.3
20260.000.002.3
20270.000.002.3
20280.000.002.3
20290.000.002.3

Sooty Grouse Survey Routes in Alaska

Routes recording Sooty Grouse in Alaska.
Zimovia Strt2020241988
Haines1620241972
Mitkof Isle1120241988
Kuiu Island820102004
Skagway520241994
Wrangell (Short)419841984
Hyder420091994
Zarembo220142000
Chichagof Is220241994
Petersburg119871987
Stikine River120221998
Juneau Alt119861984
Juneau120221983
Ketchikan120211974
Hoonah120241994

Sooty Grouse Population Trend in Other States

californiaoregonwashington

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