Species · BCR 9 · BBS 2025 Release · 1966–2024
Hooded Merganser In Great Basin
Hooded Merganser in Great Basin has declined: down 48% on the route-weighted index since 1989.
-48%Since 1989
9Routes In Region
13Years
Notable Signals
No notable trend signals for Hooded Merganser in Great Basin. See the full index history below.
Routes In Great Basin
| Joseph | OREGON | 6 | 2005 |
| Nighthawk | WASHINGTON | 2 | 2013 |
| Dell Spring | OREGON | 1 | 1972 |
| Newhalem | WASHINGTON | 1 | 1989 |
| Twisp | WASHINGTON | 1 | 2024 |
| Kendall | WASHINGTON | 1 | 2021 |
| Carlton | WASHINGTON | 1 | 1998 |
| Columbia Nwr | WASHINGTON | 1 | 2021 |
| Turnbull Nwr | WASHINGTON | 1 | 2017 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.