Species · BCR 10 · BBS 2025 Release · 1966–2024
Great Gray Owl In Northern Rockies
Great Gray Owl in Northern Rockies has fallen sharply: down 68% on the route-weighted index since 1992.
-68%Since 1992
11Routes In Region
14Years
Notable Signals
No notable trend signals for Great Gray Owl in Northern Rockies. See the full index history below.
Routes In Northern Rockies
| Naples | IDAHO | 2 | 1981 |
| Lolo Pass | IDAHO | 1 | 2014 |
| Cape Horn | IDAHO | 1 | 2023 |
| Centerville | IDAHO | 1 | 2005 |
| Burgdorf | IDAHO | 1 | 2009 |
| Libby Dam | MONTANA | 1 | 1985 |
| Woodman | MONTANA | 1 | 1999 |
| Sula | MONTANA | 1 | 2021 |
| Cramer Creek | MONTANA | 1 | 2017 |
| Flora | OREGON | 1 | 1999 |
| Eagle Creek | OREGON | 1 | 2003 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.