Species · BCR 16 · BBS 2025 Release · 1966–2024
Summer Tanager In Southern Rockies / Colorado Plateau
Summer Tanager in Southern Rockies / Colorado Plateau has fallen sharply: down 63% on the route-weighted index since 1992.
-63%Since 1992
5Routes In Region
18Years
Notable Signals
No notable trend signals for Summer Tanager in Southern Rockies / Colorado Plateau. See the full index history below.
Forecast
If the recent trend holds, Summer Tanager in Southern Rockies / Colorado Plateau is projected to stay roughly flat through 2028, near 0.00 (95% range 0.00–0.01). A 5-year backtest shows a typical error of ±102.7%, with 80% of held-out values landing inside the 95% band.
n/aChange by 2028
0.00Projected 2028 index
0.00–0.0195% range
±102.7%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2024 | 0.00 | 0.00 | 0.02 |
| 2025 | 0.00 | 0.00 | 0.02 |
| 2026 | 0.00 | 0.00 | 0.01 |
| 2027 | 0.00 | 0.00 | 0.01 |
| 2028 | 0.00 | 0.00 | 0.01 |
Routes In Southern Rockies / Colorado Plateau
| Peach Spring | ARIZONA | 1 | 2023 |
| La Cienega | NEW-MEXICO | 1 | 2014 |
| Valencia | NEW-MEXICO | 1 | 1972 |
| Vallecitos | NEW-MEXICO | 1 | 2018 |
| Shivwitz | UTAH | 1 | 2021 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.