Species · BCR 32 · BBS 2025 Release · 1966–2024
Calliope Hummingbird In Coastal California
Calliope Hummingbird in Coastal California has collapsed: down 89% on the route-weighted index since 1971.
-89%Since 1971
7Routes In Region
27Years
Notable Signals
long arc declinecomputed index
Calliope Hummingbird has collapsed in Coastal California: down 89% on the route-weighted index since 1971.
Forecast
If the recent trend holds, Calliope Hummingbird in Coastal California is projected to stay roughly flat through 2028, near 0.00 (95% range 0.00–0.11). A 5-year backtest shows a typical error of ±652.3%, with 40% of held-out values landing inside the 95% band.
n/aChange by 2028
0.00Projected 2028 index
0.00–0.1195% range
±652.3%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2024 | 0.00 | 0.00 | 0.11 |
| 2025 | 0.00 | 0.00 | 0.11 |
| 2026 | 0.00 | 0.00 | 0.11 |
| 2027 | 0.00 | 0.00 | 0.11 |
| 2028 | 0.00 | 0.00 | 0.11 |
Routes In Coastal California
| Big Bear | CALIFORNIA | 7 | 1981 |
| Mt Pinos | CALIFORNIA | 1 | 1993 |
| Lake Hemet | CALIFORNIA | 1 | 1970 |
| Valyermo | CALIFORNIA | 1 | 1978 |
| Fallsvale | CALIFORNIA | 1 | 1973 |
| Green Valley | CALIFORNIA | 1 | 2023 |
| Gold Hill | CALIFORNIA | 1 | 1985 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.