Species · Idaho · BBS 2025 Release · 1966–2024
Bufflehead Population Trend in Idaho
Bufflehead in Idaho has declined: down 43% on the route-weighted index since 1987.
-43%Since 1987
10Routes In State
17Years
Notable Bufflehead Trends in Idaho
No notable trend signals for Bufflehead in Idaho. See the full index history below.
Bufflehead Survey Routes in Idaho
| Salmon River | 8 | 2002 | 2002 |
| Naples | 6 | 2016 | 1981 |
| Iron Springs | 4 | 2018 | 1999 |
| Lolo Pass | 3 | 2019 | 2000 |
| Carey | 2 | 1999 | 1999 |
| Springfield | 2 | 1978 | 1978 |
| Blackft Res | 1 | 1987 | 1987 |
| Cabarton | 1 | 2023 | 2002 |
| Burgdorf | 1 | 2003 | 2003 |
| Pasadena Val | 1 | 1991 | 1991 |
Bufflehead Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.