Species · Michigan · BBS 2025 Release · 1966–2024
Chestnut-sided Warbler Population Trend in Michigan
Chestnut-sided Warbler in Michigan has surged: up 100% on the route-weighted index since 1968.
+100%Since 1968
92Routes In State
58Years
Notable Chestnut-sided Warbler Trends in Michigan
long arc increasecomputed index
Chestnut-sided Warbler has surged in Michigan: up 100% on the route-weighted index since 1968.
Chestnut-sided Warbler Population Forecast in Michigan
If the recent trend holds, Chestnut-sided Warbler in Michigan is projected to fall about 28% by 2029 — from 4.2 in 2024 to a central estimate of 3.0 (95% range 1.6–4.4). A 5-year backtest shows a typical error of ±25%, with 80% of held-out values landing inside the 95% band.
-28%Change by 2029
3.0Projected 2029 index
1.6–4.495% range
±25%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 3.0 | 1.6 | 4.4 |
| 2026 | 3.0 | 1.6 | 4.4 |
| 2027 | 3.0 | 1.6 | 4.4 |
| 2028 | 3.0 | 1.6 | 4.4 |
| 2029 | 3.0 | 1.6 | 4.4 |
Chestnut-sided Warbler Survey Routes in Michigan
| Brocky Lake | 28 | 2024 | 1980 |
| Pickford | 25 | 2024 | 1974 |
| Ned Lake | 22 | 2024 | 1986 |
| Raco | 18 | 2024 | 1971 |
| Marenisco | 15 | 2019 | 1981 |
| Herman | 15 | 2022 | 1983 |
| Shingleton | 14 | 2024 | 1967 |
| Sidnaw | 13 | 2024 | 1993 |
| Isabella 2 | 12 | 2024 | 2017 |
| Maple Grove | 10 | 2024 | 1969 |
| Imp Lake | 10 | 2019 | 1992 |
| Ontonagon | 9 | 2019 | 1967 |
| Hubbard Lake | 9 | 1996 | 1975 |
| Crystal Fls | 8 | 2024 | 1979 |
| Gibbs City | 8 | 2024 | 1979 |
| Muskallonge | 6 | 2024 | 1966 |
| Gilchrist | 6 | 2021 | 1974 |
| Cathro | 6 | 2008 | 1967 |
| Harrietta | 6 | 2024 | 1990 |
| Scott'S Marsh | 6 | 2010 | 2006 |
| Bootjack | 5 | 2023 | 1967 |
| Ishpeming | 5 | 2023 | 1980 |
| Scottville | 5 | 2024 | 1971 |
| Tahquamenon | 5 | 2024 | 1974 |
| Pleasant Valley 2 | 5 | 2023 | 2023 |
Chestnut-sided Warbler Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.