BirdAnalyst
Species · BCR 15 · BBS 2025 Release · 1966–2024

Sooty Grouse In Sierra Nevada

All regionsSierra NevadaGeneralists

Sooty Grouse in Sierra Nevada has increased: up 31% on the route-weighted index since 1977.

+31%Since 1977
16Routes In Region
34Years

Notable Signals

No notable trend signals for Sooty Grouse in Sierra Nevada. See the full index history below.

Forecast

If the recent trend holds, Sooty Grouse in Sierra Nevada is projected to rise about 197% by 2028 — from 0.06 in 2023 to a central estimate of 0.17 (95% range 0.00–0.41). A 5-year backtest shows a typical error of ±147.8%, with 100% of held-out values landing inside the 95% band.

+197%Change by 2028
0.17Projected 2028 index
0.00–0.4195% range
±147.8%Backtest error
19732028
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
20240.170.000.40
20250.170.000.40
20260.170.000.41
20270.170.000.41
20280.170.000.41

Routes In Sierra Nevada

Routes recording Sooty Grouse in Sierra Nevada.
LakeshoreCALIFORNIA52007
GeneseeCALIFORNIA42015
PaxtonCALIFORNIA32007
Hat CreekCALIFORNIA22017
Pine MountainCALIFORNIA21997
Lassen ParkCALIFORNIA11989
Eagle LakeCALIFORNIA11994
WestvilleCALIFORNIA12017
DardanelleCALIFORNIA12008
JohnsvilleCALIFORNIA12022
WoodfordsCALIFORNIA12012
Tuolumne GroveCALIFORNIA11980
RivertonCALIFORNIA11973
Little TruckeeCALIFORNIA12023
Forest HillCALIFORNIA12007
Forest Hill 2CALIFORNIA12005

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