Anna's Hummingbird vs Red-tailed Comet
Calypte anna 比較対象 Sappho sparganurus
Side-by-Side Comparison
| 属性 | Anna's Hummingbird | Red-tailed Comet |
|---|---|---|
| 学名 | Calypte anna | Sappho sparganurus |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Trochilidae | Trochilidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | 10.0 cm (3.9 in) | — |
| 翼開長 | 12.0 cm (4.7 in) | 12.6 cm (5.0 in) |
| 体重 | 4.3 g (0.15 oz) | 5.4 g (0.19 oz) |
| 食性 | Nectar, small insects, and tree sap. Visits a wide variety of native and ornamental flowering … | Nectarivore of Andean high-altitude scrub; visits Chuquiraga and Ericaceae flowers. Catches small insects near blooms. |
| 一腹卵数 | 2 | 2 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Anna's Hummingbird
Chaparral, coastal sage scrub, gardens, parks, and open woodland along the Pacific coast. One of few hummingbirds not fully migratory.
Song & Call Comparison
Anna's Hummingbird
Male produces a complex, scratchy song with buzzy 'dzzzzt' notes. Gives a nasal 'chee-chee-chee'. Males sing year-round, even in winter; one of few hummingbirds with true song.
Red-tailed Comet
Pure, bell-like tones in descending sequence; clear musical notes stepping down smoothly with resonant ringing quality.
Geographic Range & Migration
Anna's Hummingbird
Western North America from southern British Columbia along the Pacific coast to Baja California. Range has expanded northward.
Red-tailed Comet
Found in the Andes and Patagonian scrub of Argentina and Bolivia from 1,000–4,200 m. Partly migratory southward.
保全状況
Anna's Hummingbird
Red-tailed Comet
How to Tell Them Apart
Anna's Hummingbird
Metallic bronze-green upperparts. Males have an iridescent rose-red crown and gorget. Females have green upperparts with grey underparts and a small red gorget patch.
Medium-length, straight, thin black bill
Red-tailed Comet
About These Birds
Anna's Hummingbird
Anna's hummingbird is the most common hummingbird along the Pacific coast and one of only three species resident in the United States year-round. Males perform spectacular dive displays, plummeting from 40 meters and pulling up with a loud chirp produced by tail feathers. Their body temperature can drop to near ambient at night to conserve energy.
Red-tailed Comet
A stunning hummingbird (15-22 cm including tail) found in dry inter-Andean valleys from Bolivia to northwestern Argentina at 2,000-4,500 m. Males have a deeply forked, iridescent red-orange tail. Nectarivore of arid scrub and cactus flowers. An iconic Andean species.