Species · BCR 17 · BBS 2025 Release · 1966–2024
Bell's Vireo In Badlands and Prairies
Bell's Vireo in Badlands and Prairies has fallen sharply: down 50% on the route-weighted index since 1969.
-50%Since 1969
18Routes In Region
46Years
Notable Signals
long arc declinecomputed index
Bell's Vireo has fallen sharply in Badlands and Prairies: down 50% on the route-weighted index since 1969.
Forecast
If the recent trend holds, Bell's Vireo in Badlands and Prairies is projected to stay roughly flat through 2029, near 0.06 (95% range 0.00–0.17). A 5-year backtest shows a typical error of ±53.3%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2029
0.06Projected 2029 index
0.00–0.1795% range
±53.3%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.07 | 0.00 | 0.17 |
| 2026 | 0.07 | 0.00 | 0.17 |
| 2027 | 0.06 | 0.00 | 0.17 |
| 2028 | 0.06 | 0.00 | 0.17 |
| 2029 | 0.06 | 0.00 | 0.17 |
Routes In Badlands and Prairies
| Rosebud | SOUTH-DAKOTA | 7 | 2010 |
| Chamberlain | SOUTH-DAKOTA | 4 | 2011 |
| Oglala Nat. Grass. | NEBRASKA | 3 | 2002 |
| Crookston | NEBRASKA | 2 | 2024 |
| Solen | NORTH-DAKOTA | 2 | 2017 |
| Winner | SOUTH-DAKOTA | 2 | 2022 |
| Rockyford | SOUTH-DAKOTA | 2 | 2023 |
| Laplant | SOUTH-DAKOTA | 2 | 1971 |
| Promise | SOUTH-DAKOTA | 2 | 2015 |
| Lacreek | SOUTH-DAKOTA | 2 | 2023 |
| Ft Thompson | SOUTH-DAKOTA | 1 | 2011 |
| Owanka | SOUTH-DAKOTA | 1 | 1985 |
| Ottumwa | SOUTH-DAKOTA | 1 | 1973 |
| Cedar Pass | SOUTH-DAKOTA | 1 | 1975 |
| Fort Pierre | SOUTH-DAKOTA | 1 | 2021 |
| Maurine | SOUTH-DAKOTA | 1 | 2023 |
| Badlands | SOUTH-DAKOTA | 1 | 2023 |
| White River | SOUTH-DAKOTA | 1 | 2013 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.