Species · Utah · BBS 2025 Release · 1966–2024
Common Merganser Population Trend in Utah
Common Merganser in Utah has declined: down 38% on the route-weighted index since 1995.
-38%Since 1995
9Routes In State
18Years
Notable Common Merganser Trends in Utah
No notable trend signals for Common Merganser in Utah. See the full index history below.
Common Merganser Population Forecast in Utah
If the recent trend holds, Common Merganser in Utah is projected to stay roughly flat through 2029, near 0.03 (95% range 0.00–0.10). A 5-year backtest shows a typical error of ±113.4%, with 80% of held-out values landing inside the 95% band.
n/aChange by 2029
0.03Projected 2029 index
0.00–0.1095% range
±113.4%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.03 | 0.00 | 0.10 |
| 2026 | 0.03 | 0.00 | 0.10 |
| 2027 | 0.03 | 0.00 | 0.10 |
| 2028 | 0.03 | 0.00 | 0.10 |
| 2029 | 0.03 | 0.00 | 0.10 |
Common Merganser Survey Routes in Utah
| Ferron | 6 | 2021 | 2018 |
| Jensen | 3 | 2007 | 2007 |
| Kamas | 3 | 2015 | 2004 |
| Neponset Res | 1 | 2003 | 1995 |
| Lost Cr. Res | 1 | 2015 | 2015 |
| Delta | 1 | 1994 | 1994 |
| Hanna | 1 | 2024 | 2000 |
| Aneth | 1 | 2010 | 2010 |
| Lynn | 1 | 2009 | 1990 |
Common Merganser Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.