Species · BCR 23 · BBS 2025 Release · 1966–2024
Least Bittern In Prairie Hardwood Transition
Least Bittern in Prairie Hardwood Transition has declined: down 33% on the route-weighted index since 1972.
-33%Since 1972
25Routes In Region
38Years
Notable Signals
No notable trend signals for Least Bittern in Prairie Hardwood Transition. See the full index history below.
Forecast
If the recent trend holds, Least Bittern in Prairie Hardwood Transition is projected to stay roughly flat through 2024, near 0.01 (95% range 0.00–0.02). A 5-year backtest shows a typical error of ±35.5%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2024
0.01Projected 2024 index
0.00–0.0295% range
±35.5%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2020 | 0.01 | 0.00 | 0.02 |
| 2021 | 0.01 | 0.00 | 0.02 |
| 2022 | 0.01 | 0.00 | 0.02 |
| 2023 | 0.01 | 0.00 | 0.02 |
| 2024 | 0.01 | 0.00 | 0.02 |
Routes In Prairie Hardwood Transition
| Money Creek | MINNESOTA | 2 | 1989 |
| Unity | WISCONSIN | 2 | 2009 |
| Nashville | MICHIGAN | 1 | 1998 |
| Coopersville | MICHIGAN | 1 | 2004 |
| Galesburg | MICHIGAN | 1 | 1980 |
| Monterey | MICHIGAN | 1 | 1995 |
| Pettysville | MICHIGAN | 1 | 1976 |
| Chippewa Lk. | MICHIGAN | 1 | 2006 |
| Osseo | MINNESOTA | 1 | 1979 |
| St Stephen | MINNESOTA | 1 | 2002 |
| Glenwood | MINNESOTA | 1 | 1993 |
| Sherburne Nr | MINNESOTA | 1 | 2017 |
| Hudson | WISCONSIN | 1 | 2014 |
| Dresser | WISCONSIN | 1 | 1970 |
| Loraine | WISCONSIN | 1 | 2003 |
| Merrill | WISCONSIN | 1 | 1997 |
| Cochrane | WISCONSIN | 1 | 2010 |
| Mather | WISCONSIN | 1 | 1986 |
| Omro | WISCONSIN | 1 | 1983 |
| Fall River | WISCONSIN | 1 | 1994 |
| Beaver Dam | WISCONSIN | 1 | 2013 |
| Mount Horeb | WISCONSIN | 1 | 1971 |
| Stetsonville | WISCONSIN | 1 | 2019 |
| Buena Vista | WISCONSIN | 1 | 2000 |
| Briggsville | WISCONSIN | 1 | 2017 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.