Species · BCR 10 · BBS 2025 Release · 1966–2024
Northern Mockingbird In Northern Rockies
Northern Mockingbird in Northern Rockies has fallen sharply: down 57% on the route-weighted index since 1996.
-57%Since 1996
17Routes In Region
29Years
Notable Signals
long arc declinecomputed index
Northern Mockingbird has fallen sharply in Northern Rockies: down 57% on the route-weighted index since 1996.
Forecast
If the recent trend holds, Northern Mockingbird in Northern Rockies is projected to stay roughly flat through 2029, near 0.00 (95% range 0.00–0.09). A 5-year backtest shows a typical error of ±207.8%, with 60% of held-out values landing inside the 95% band.
n/aChange by 2029
0.00Projected 2029 index
0.00–0.0995% range
±207.8%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.01 | 0.00 | 0.10 |
| 2026 | 0.01 | 0.00 | 0.10 |
| 2027 | 0.00 | 0.00 | 0.09 |
| 2028 | 0.00 | 0.00 | 0.09 |
| 2029 | 0.00 | 0.00 | 0.09 |
Routes In Northern Rockies
| Baggs | WYOMING | 6 | 2022 |
| Rock Springs | WYOMING | 2 | 2022 |
| Maybell | COLORADO | 1 | 2024 |
| Great Divide | COLORADO | 1 | 2018 |
| Lay | COLORADO | 1 | 2024 |
| Crane Creek | IDAHO | 1 | 1997 |
| Elliston | MONTANA | 1 | 2007 |
| Glen | MONTANA | 1 | 2019 |
| Willow Creek 2 | MONTANA | 1 | 2006 |
| Clover Creek | OREGON | 1 | 1991 |
| Randolph | UTAH | 1 | 2008 |
| Neponset Res | UTAH | 1 | 2000 |
| Otto | WYOMING | 1 | 2003 |
| Ervay | WYOMING | 1 | 2014 |
| Sand Draw | WYOMING | 1 | 2017 |
| Lamont | WYOMING | 1 | 1998 |
| Flamin Gorge | WYOMING | 1 | 2024 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.