Costa's Hummingbird
Costa's Hummingbird has increased: up 42% on the route-weighted index since 1970.
About the Costa's Hummingbird
The Costa's Hummingbird (Calypte costae) is a North American member of the Hummingbirds (Trochilidae). In this analysis it is grouped with the forest birds.
- Size
- 3–5 in long (8–13 cm) — a tiny hovering bird (typical for the family)
- Habitat
- Woodlands and forest edges, including wooded suburbs and parks.
- Diet
- Insects and spiders gleaned from foliage and bark, with seeds and berries in season.
- Range
- Recorded on 113 Breeding Bird Survey routes across 4 states, most concentrated in the Sonoran and Mojave Deserts.
- Family
- Trochilidae · Forest birds
Notable Costa's Hummingbird Trends
No notable trend signals for Costa's Hummingbird. See the full index history below.
Costa's Hummingbird Population Forecast
If the recent trend holds, Costa's Hummingbird is projected to stay roughly flat through 2029, near 0.02 (95% range 0.00–0.04). A 5-year backtest shows a typical error of ±20.1%, with 100% of held-out values landing inside the 95% band.
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.02 | 0.00 | 0.04 |
| 2026 | 0.02 | 0.00 | 0.04 |
| 2027 | 0.02 | 0.00 | 0.04 |
| 2028 | 0.02 | 0.00 | 0.04 |
| 2029 | 0.02 | 0.00 | 0.04 |
Where the Costa's Hummingbird Is Detected
BBS routes recording Costa's Hummingbird, sized by most recent count.
Costa's Hummingbird Population Trend by State
| Arizona | +200% | 1976 | 27 |
| California | +6% | 1970 | 78 |
| Nevada | +39% | 1994 | 4 |
| Utah | insufficient data | n/a | 4 |
Costa's Hummingbird Population Trend by Region
Bird Conservation Regions are the ecological unit for trends.
| Coastal California | +75% | 1970 | 41 |
| Sonoran and Mojave Deserts | +47% | 1970 | 55 |
| Sierra Madre Occidental | -33% | 1977 | 8 |
Costa's Hummingbird Conservation Status
Our route-weighted index shows it up about 42% since 1970.
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. Trend is a route-weighted relative-abundance index, not an absolute population.