Species · Montana · BBS 2025 Release · 1966–2024
Plumbeous Vireo Population Trend in Montana
Plumbeous Vireo in Montana has fallen sharply: down 63% on the route-weighted index since 1984.
-63%Since 1984
17Routes In State
38Years
Notable Plumbeous Vireo Trends in Montana
No notable trend signals for Plumbeous Vireo in Montana. See the full index history below.
Plumbeous Vireo Population Forecast in Montana
If the recent trend holds, Plumbeous Vireo in Montana is projected to stay roughly flat through 2029, near 0.00 (95% range 0.00–1.1). A 5-year backtest shows a typical error of ±253.1%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2029
0.00Projected 2029 index
0.00–1.195% range
±253.1%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.00 | 0.00 | 1.1 |
| 2026 | 0.00 | 0.00 | 1.1 |
| 2027 | 0.00 | 0.00 | 1.1 |
| 2028 | 0.00 | 0.00 | 1.1 |
| 2029 | 0.00 | 0.00 | 1.1 |
Plumbeous Vireo Survey Routes in Montana
| Glen | 150 | 1991 | 1991 |
| Red Rock | 5 | 1989 | 1988 |
| Brandenberg | 2 | 2015 | 1994 |
| Flatwillow 2 | 1 | 2017 | 2017 |
| Sula | 1 | 1997 | 1986 |
| Chestnut | 1 | 2002 | 1985 |
| Reed Point | 1 | 2018 | 1984 |
| Laurel | 1 | 2018 | 1997 |
| Miles City | 1 | 2023 | 2023 |
| Bull Mtn. | 1 | 2001 | 2001 |
| Polson | 1 | 2000 | 2000 |
| Arlee | 1 | 2001 | 1998 |
| Highwood | 1 | 1974 | 1974 |
| Brusett | 1 | 1983 | 1983 |
| Jordan | 1 | 2024 | 2024 |
| Wise River | 1 | 1994 | 1993 |
| Elliston | 1 | 1997 | 1989 |
Plumbeous Vireo Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.