Species · Michigan · BBS 2025 Release · 1966–2024
Trumpeter Swan Population Trend in Michigan
Trumpeter Swan in Michigan has surged: up 315% on the route-weighted index since 1996.
+315%Since 1996
23Routes In State
27Years
Notable Trumpeter Swan Trends in Michigan
long arc increasecomputed index
Trumpeter Swan has surged in Michigan: up 315% on the route-weighted index since 1996.
Trumpeter Swan Population Forecast in Michigan
If the recent trend holds, Trumpeter Swan in Michigan is projected to rise about 62% by 2029 — from 0.21 in 2024 to a central estimate of 0.34 (95% range 0.00–0.96). A 5-year backtest shows a typical error of ±359.7%, with 100% of held-out values landing inside the 95% band.
+62%Change by 2029
0.34Projected 2029 index
0.00–0.9695% range
±359.7%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.34 | 0.00 | 0.95 |
| 2026 | 0.34 | 0.00 | 0.95 |
| 2027 | 0.34 | 0.00 | 0.95 |
| 2028 | 0.34 | 0.00 | 0.96 |
| 2029 | 0.34 | 0.00 | 0.96 |
Trumpeter Swan Survey Routes in Michigan
| Ontonagon | 4 | 2019 | 2016 |
| Tahquamenon | 4 | 2024 | 2023 |
| Bergland | 3 | 2014 | 2012 |
| Marenisco | 3 | 2019 | 2015 |
| Cohoctah | 3 | 2024 | 2022 |
| Maple Grove | 2 | 2023 | 2023 |
| Betchler Lks | 2 | 2023 | 2023 |
| Creighton | 2 | 2004 | 2004 |
| Beaver Lake | 2 | 2011 | 2011 |
| Gibbs City | 1 | 2024 | 2019 |
| Brocky Lake | 1 | 2019 | 2019 |
| Hamburg 2 | 1 | 2021 | 2021 |
| Seney Nwr | 1 | 2024 | 1995 |
| Sidnaw | 1 | 2019 | 2016 |
| Barry S.G.A. | 1 | 2006 | 2006 |
| Bear Lake | 1 | 2022 | 2019 |
| Gooseneck | 1 | 2010 | 2010 |
| Lawrence | 1 | 2023 | 2023 |
| Nashville | 1 | 2006 | 2006 |
| Galesburg | 1 | 2019 | 1990 |
| Howardsville | 1 | 2015 | 2009 |
| Rochester | 1 | 2017 | 2017 |
| Raco | 1 | 2024 | 2015 |
Trumpeter Swan Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.