Anna's Hummingbird vs Slender-tailed Woodstar
Calypte anna 比較対象 Microstilbon burmeisteri
Side-by-Side Comparison
| 属性 | Anna's Hummingbird | Slender-tailed Woodstar |
|---|---|---|
| 学名 | Calypte anna | Microstilbon burmeisteri |
| 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) | 6.0 cm (2.4 in) |
| 体重 | 4.3 g (0.15 oz) | 2.09 g (0.07 oz) |
| 食性 | Nectar, small insects, and tree sap. Visits a wide variety of native and ornamental flowering … | Nectarivore of montane scrub, probing small tubular flowers. Catches spiders and minute flies to supply … |
| 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.
Slender-tailed Woodstar
Soft, liquid descending cascade; gentle mellow notes flowing downward in quiet musical sequence at dawn.
Geographic Range & Migration
Anna's Hummingbird
Western North America from southern British Columbia along the Pacific coast to Baja California. Range has expanded northward.
Slender-tailed Woodstar
Found in arid scrub and woodland of central Bolivia and northwestern Argentina at 1,000-3,000 m. Resident and partial migrant.
保全状況
Anna's Hummingbird
Slender-tailed Woodstar
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
Slender-tailed Woodstar
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.
Slender-tailed Woodstar
アルゼンチンとボリビアの低木林や森林縁部に生息するシャムショールドハミングバード。体長7〜8cm。雄の輝く緑と赤紫色の羽毛が特徴的な小型ハチドリ。花の蜜を主食とする。低危険種。