Species · Utah · BBS 2025 Release · 1966–2024
Wilson's Warbler Population Trend in Utah
Wilson's Warbler in Utah has collapsed: down 81% on the route-weighted index since 1977.
-81%Since 1977
29Routes In State
35Years
Notable Wilson's Warbler Trends in Utah
long arc declinecomputed index
Wilson's Warbler has collapsed in Utah: down 81% on the route-weighted index since 1977.
Wilson's Warbler Population Forecast in Utah
If the recent trend holds, Wilson's Warbler in Utah is projected to fall about 100% by 2029 — from 0.07 in 2024 to a central estimate of 0.00 (95% range 0.00–0.23). A 5-year backtest shows a typical error of ±168.9%, with 100% of held-out values landing inside the 95% band.
-100%Change by 2029
0.00Projected 2029 index
0.00–0.2395% range
±168.9%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.00 | 0.00 | 0.23 |
| 2026 | 0.00 | 0.00 | 0.23 |
| 2027 | 0.00 | 0.00 | 0.23 |
| 2028 | 0.00 | 0.00 | 0.23 |
| 2029 | 0.00 | 0.00 | 0.23 |
Wilson's Warbler Survey Routes in Utah
| Moon Lake 2 | 3 | 2016 | 2016 |
| La Sal | 3 | 1993 | 1993 |
| Goose Creek Mtn. | 3 | 2007 | 2002 |
| Newcastle | 3 | 2022 | 2022 |
| Notom | 3 | 1989 | 1989 |
| Beck | 2 | 1974 | 1974 |
| Lynn | 2 | 2011 | 1998 |
| Soapstone | 2 | 2007 | 2002 |
| Kamas | 2 | 2011 | 2011 |
| Heber Mtn. | 2 | 2012 | 2001 |
| Ant Flat-Ogden Can | 2 | 2021 | 1995 |
| Uintah Nf | 2 | 1991 | 1991 |
| Wasatch Nf | 2 | 2024 | 1988 |
| Hyrum | 1 | 1977 | 1976 |
| Altonah | 1 | 2006 | 1995 |
| Grizzly Rdge | 1 | 2024 | 2024 |
| Bryce Canyon | 1 | 1994 | 1993 |
| Beaver | 1 | 1991 | 1991 |
| Hanksville | 1 | 2011 | 2011 |
| Navajo Lake | 1 | 2011 | 1990 |
| Moon Lake | 1 | 2002 | 2002 |
| Skyline Driv | 1 | 2007 | 2007 |
| Richfield | 1 | 2018 | 2018 |
| Gooseberry | 1 | 2024 | 1996 |
| Hanna | 1 | 2011 | 2005 |
Wilson's Warbler Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.