Anna's Hummingbird vs Amethyst Woodstar
Calypte anna 比較対象 Calliphlox amethystina
Side-by-Side Comparison
| 属性 | Anna's Hummingbird | Amethyst Woodstar |
|---|---|---|
| 学名 | Calypte anna | Calliphlox amethystina |
| 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) | 7.0 cm (2.8 in) |
| 体重 | 4.3 g (0.15 oz) | 2.9 g (0.10 oz) |
| 食性 | Nectar, small insects, and tree sap. Visits a wide variety of native and ornamental flowering … | Nectarivore visiting small flowers at forest edges and clearings; insect-like flight. Catches tiny flies and … |
| 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.
Amethyst Woodstar
High, crystalline notes in ascending phrase; clear bright musical tones climbing smoothly in lively morning song.
Geographic Range & Migration
Anna's Hummingbird
Western North America from southern British Columbia along the Pacific coast to Baja California. Range has expanded northward.
Amethyst Woodstar
Widespread in open habitats from Bolivia and Brazil south to Argentina, Paraguay, and Uruguay. Sea level to 1,200 m.
保全状況
Anna's Hummingbird
Amethyst 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
Amethyst Woodstar
Buff-breasted Sabrewing: males with glittering purple gorget; metallic bronze-green above; buff underparts; females green above; spots
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.
Amethyst Woodstar
南米（ブラジル、ボリビア、アルゼンチン北部）の熱帯林縁、庭園、二次林に生息する小型のハチドリ（体長6〜8cm）。雄のアメジスト色に輝く喉が最大の特徴。Calliphlox amethystina（アメジストウッドスター）は南米最小のハチドリの一つで、体重は1g程度しかない。Trochilidae科。