Species · BCR 9 · BBS 2025 Release · 1966–2024
Dusky Grouse In Great Basin
Dusky Grouse in Great Basin has fallen sharply: down 67% on the route-weighted index since 1976.
-67%Since 1976
6Routes In Region
31Years
Notable Signals
long arc declinecomputed index
Dusky Grouse has fallen sharply in Great Basin: down 67% on the route-weighted index since 1976.
Forecast
If the recent trend holds, Dusky Grouse in Great Basin is projected to stay roughly flat through 2029, near 0.00 (95% range 0.00–0.04). A 5-year backtest shows a typical error of ±92.4%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2029
0.00Projected 2029 index
0.00–0.0495% range
±92.4%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.01 | 0.00 | 0.04 |
| 2026 | 0.01 | 0.00 | 0.04 |
| 2027 | 0.00 | 0.00 | 0.04 |
| 2028 | 0.00 | 0.00 | 0.04 |
| 2029 | 0.00 | 0.00 | 0.04 |
Routes In Great Basin
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.