Anna's Hummingbird vs Esmeraldas Woodstar
Calypte anna 比較対象 Chaetocercus berlepschi
Side-by-Side Comparison
| 属性 | Anna's Hummingbird | Esmeraldas Woodstar |
|---|---|---|
| 学名 | Calypte anna | Chaetocercus berlepschi |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Trochilidae | Trochilidae |
| 保全状況 | Least Concern | Vulnerable |
| 体長 | 10.0 cm (3.9 in) | — |
| 翼開長 | 12.0 cm (4.7 in) | 5.3 cm (2.1 in) |
| 体重 | 4.3 g (0.15 oz) | 2.505 g (0.09 oz) |
| 食性 | Nectar, small insects, and tree sap. Visits a wide variety of native and ornamental flowering … | Critically rare; feeds on nectar from flowering shrubs in Ecuadorian lowland forest. Takes small insects … |
| 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.
Esmeraldas Woodstar
Soft, melodic warbling with flowing character; gentle notes weaving smoothly in quiet phrase at forest edge.
Geographic Range & Migration
Anna's Hummingbird
Western North America from southern British Columbia along the Pacific coast to Baja California. Range has expanded northward.
Esmeraldas Woodstar
Endemic to western Ecuador in the Chocó lowlands and foothills. Classified as Endangered due to severe deforestation.
保全状況
Anna's Hummingbird
Esmeraldas 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
Esmeraldas Woodstar
Inagua Woodstar: tiny; males with brilliant violet gorget; metallic green above; white underparts; females green above; spotted below
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.
Esmeraldas Woodstar
エクアドル西部固有の微小ハチドリ（7 cm）。雄はきらめくゴージェット羽を持つ。低地・山麓の林縁で花蜜を吸う。チョコウ熱帯雨林の著しい喪失により絶滅危惧種に分類。