Species · Wisconsin · BBS 2025 Release · 1966–2024
Bell's Vireo Population Trend in Wisconsin
Bell's Vireo in Wisconsin has declined: down 39% on the route-weighted index since 1971.
-39%Since 1971
16Routes In State
29Years
Notable Bell's Vireo Trends in Wisconsin
No notable trend signals for Bell's Vireo in Wisconsin. See the full index history below.
Bell's Vireo Population Forecast in Wisconsin
If the recent trend holds, Bell's Vireo in Wisconsin is projected to stay roughly flat through 2028, near 0.02 (95% range 0.00–0.03). A 5-year backtest shows a typical error of ±33.5%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2028
0.02Projected 2028 index
0.00–0.0395% range
±33.5%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2024 | 0.02 | 0.00 | 0.03 |
| 2025 | 0.02 | 0.00 | 0.03 |
| 2026 | 0.02 | 0.00 | 0.03 |
| 2027 | 0.02 | 0.00 | 0.03 |
| 2028 | 0.02 | 0.00 | 0.03 |
Bell's Vireo Survey Routes in Wisconsin
| Trempealeau | 2 | 2011 | 1972 |
| Annaton | 2 | 2023 | 2014 |
| N Andover | 1 | 2018 | 2018 |
| Gilmanton | 1 | 2007 | 2007 |
| Wiota | 1 | 1997 | 1966 |
| Hebron | 1 | 2013 | 2013 |
| Beloit | 1 | 2010 | 2010 |
| Mather | 1 | 1974 | 1973 |
| Verona | 1 | 2015 | 2015 |
| Clintonville | 1 | 1996 | 1996 |
| Newburg Crns | 1 | 2015 | 1966 |
| Viroqua | 1 | 1982 | 1982 |
| Rolling Grnd | 1 | 1990 | 1980 |
| Pardeeville | 1 | 1994 | 1994 |
| Fall River | 1 | 2017 | 2017 |
| Highland | 1 | 1999 | 1999 |
Bell's Vireo Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.