Species · BCR 10 · BBS 2025 Release · 1966–2024
Plumbeous Vireo In Northern Rockies
Plumbeous Vireo in Northern Rockies has collapsed: down 87% on the route-weighted index since 1974.
-87%Since 1974
38Routes In Region
44Years
Notable Signals
long arc declinecomputed index
Plumbeous Vireo has collapsed in Northern Rockies: down 87% on the route-weighted index since 1974.
Forecast
If the recent trend holds, Plumbeous Vireo in Northern Rockies is projected to stay roughly flat through 2029, near 0.00 (95% range 0.00–0.54). A 5-year backtest shows a typical error of ±78.8%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2029
0.00Projected 2029 index
0.00–0.5495% range
±78.8%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.00 | 0.00 | 0.54 |
| 2026 | 0.00 | 0.00 | 0.54 |
| 2027 | 0.00 | 0.00 | 0.54 |
| 2028 | 0.00 | 0.00 | 0.54 |
| 2029 | 0.00 | 0.00 | 0.54 |
Routes In Northern Rockies
| Glen | MONTANA | 150 | 1991 |
| Red Rock | MONTANA | 5 | 1989 |
| Moose | WYOMING | 4 | 1991 |
| Cascade | IDAHO | 3 | 1983 |
| Sunbeam | IDAHO | 3 | 1994 |
| Featherville | IDAHO | 3 | 1998 |
| Savery | WYOMING | 3 | 1995 |
| Centerville | IDAHO | 2 | 2015 |
| Cabarton | IDAHO | 2 | 1995 |
| Ne Entrance | WYOMING | 2 | 1993 |
| Hunter Peak | WYOMING | 2 | 2004 |
| Maybell | COLORADO | 1 | 2007 |
| Great Divide | COLORADO | 1 | 1994 |
| Browns Park | COLORADO | 1 | 1997 |
| Cape Horn | IDAHO | 1 | 1998 |
| Yellow Pine | IDAHO | 1 | 1994 |
| Polson | MONTANA | 1 | 2000 |
| Arlee | MONTANA | 1 | 2001 |
| Elliston | MONTANA | 1 | 1997 |
| Sula | MONTANA | 1 | 1997 |
| Chestnut | MONTANA | 1 | 2002 |
| Laurel | MONTANA | 1 | 2018 |
| Wise River | MONTANA | 1 | 1994 |
| Saleratus Cr | UTAH | 1 | 2005 |
| E. Bear Lake | UTAH | 1 | 2022 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.