Anna's Hummingbird vs Bronze-tailed Comet
Calypte anna 比較対象 Polyonymus caroli
Side-by-Side Comparison
| 属性 | Anna's Hummingbird | Bronze-tailed Comet |
|---|---|---|
| 学名 | Calypte anna | Polyonymus caroli |
| 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) | 12.9 cm (5.1 in) |
| 体重 | 4.3 g (0.15 oz) | 5.125 g (0.18 oz) |
| 食性 | Nectar, small insects, and tree sap. Visits a wide variety of native and ornamental flowering … | Nectarivore of high puna and queñual woodland; forages at Chuquiraga and Polylepis flowers. Gleans small … |
| 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.
Bronze-tailed Comet
Soft, thin twittering barely audible; delicate minute notes cascading gently almost lost in surrounding forest sounds.
Geographic Range & Migration
Anna's Hummingbird
Western North America from southern British Columbia along the Pacific coast to Baja California. Range has expanded northward.
Bronze-tailed Comet
Endemic to Peru in the Río Marañón drainage and adjacent valleys in arid scrub and dry forest. 1,800–3,200 m.
保全状況
Anna's Hummingbird
Bronze-tailed Comet
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
Bronze-tailed Comet
Esmeraldas Woodstar: males with glittering purple gorget; metallic bronze-green above; white underparts; females green above with 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.
Bronze-tailed Comet
A medium-sized hummingbird (13-15 cm) endemic to the Andes of Peru at 2,700-4,000 m. Green plumage with a bronze-colored, forked tail. Nectarivore of montane scrub and Polylepis forest. Uncommon and restricted to high-elevation habitats.