Anna's Hummingbird vs Red-billed Streamertail
Calypte anna 比較対象 Trochilus polytmus
Side-by-Side Comparison
| 属性 | Anna's Hummingbird | Red-billed Streamertail |
|---|---|---|
| 学名 | Calypte anna | Trochilus polytmus |
| 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) | 11.8 cm (4.6 in) |
| 体重 | 4.3 g (0.15 oz) | 4.9 g (0.17 oz) |
| 食性 | Nectar, small insects, and tree sap. Visits a wide variety of native and ornamental flowering … | Visits flowering trees and epiphytes for nectar; supplements diet with small arthropods including gnats, midges, … |
| 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-billed Streamertail
Sharp, emphatic two-note call; high accented first note followed by lower brief second, clearly projected.
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-billed Streamertail
Endemic to Jamaica. National bird. Resident across the island in forests, gardens, and plantations at all elevations.
保全状況
Anna's Hummingbird
Red-billed Streamertail
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-billed Streamertail
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-billed Streamertail
ロングテイルドジャマイカンハミングバードはジャマイカ固有のハチドリです。雄は極めて長い尾羽と緑の羽毛が特徴的です。