Species · Michigan · BBS 2025 Release · 1966–2024
Least Bittern Population Trend in Michigan
Least Bittern in Michigan has fallen sharply: down 53% on the route-weighted index since 1978.
-53%Since 1978
9Routes In State
12Years
Notable Least Bittern Trends in Michigan
No notable trend signals for Least Bittern in Michigan. See the full index history below.
Least Bittern Survey Routes in Michigan
| Nashville | 1 | 1998 | 1978 |
| Coopersville | 1 | 2004 | 2004 |
| Galesburg | 1 | 1980 | 1970 |
| Pettysville | 1 | 1976 | 1976 |
| Monterey | 1 | 1995 | 1995 |
| Chippewa Lk. | 1 | 2006 | 2006 |
| Pickford | 1 | 1979 | 1979 |
| Brocky Lake | 1 | 2022 | 2022 |
| Lake City | 1 | 2014 | 2014 |
Least Bittern Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.