Anna's Hummingbird vs Hooded Visorbearer
Calypte anna 比較対象 Augastes lumachella
Side-by-Side Comparison
| 属性 | Anna's Hummingbird | Hooded Visorbearer |
|---|---|---|
| 学名 | Calypte anna | Augastes lumachella |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Trochilidae | Trochilidae |
| 保全状況 | Least Concern | Near Threatened |
| 体長 | 10.0 cm (3.9 in) | — |
| 翼開長 | 12.0 cm (4.7 in) | 12.0 cm (4.7 in) |
| 体重 | 4.3 g (0.15 oz) | 4.4 g (0.16 oz) |
| 食性 | Nectar, small insects, and tree sap. Visits a wide variety of native and ornamental flowering … | Nectarivore specializing in montane campo rupestre blooms. Supplements nectar diet with small arthropods. |
| 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.
Hooded Visorbearer
Harsh, buzzy chatter with raspy edge; rough notes interspersed with sharper chips in energetic vocal display.
Geographic Range & Migration
Anna's Hummingbird
Western North America from southern British Columbia along the Pacific coast to Baja California. Range has expanded northward.
Hooded Visorbearer
Endemic to the campo rupestre highlands of eastern Bahia, Brazil, in the Chapada Diamantina region. 800–1,600 m.
保全状況
Anna's Hummingbird
Hooded Visorbearer
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
Hooded Visorbearer
Booted Racket-tail: males with elongated violet-blue racket tail feathers; glittering blue-violet gorget; white leg puffs; green body
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.
Hooded Visorbearer
ブラジル・バイア州のシャパーダ・ジアマンティーナ高地固有の小型ハチドリ（8〜9cm）。黄金色に輝く緑色の前額バイザーと暗色の羽毛を持つ。岩礁のカンポ・ルペストレ生息地の蜜食者。極めて限られた分布域と生息地劣化により絶滅危惧種に分類。