Anna's Hummingbird vs Narrow-tailed Emerald
Calypte anna 对比 Chlorostilbon stenurus
Side-by-Side Comparison
| 属性 | Anna's Hummingbird | Narrow-tailed Emerald |
|---|---|---|
| 学名 | Calypte anna | Chlorostilbon stenurus |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Trochilidae | Trochilidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | 10.0 cm (3.9 in) | — |
| 翼展 | 12.0 cm (4.7 in) | 8.4 cm (3.3 in) |
| 体重 | 4.3 g (0.15 oz) | 3.4000000000000004 g (0.12 oz) |
| 食性 | Nectar, small insects, and tree sap. Visits a wide variety of native and ornamental flowering … | Feeds on floral nectar at forest edges in northwestern South America. Supplements diet with small … |
| 产卵数 | 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.
Narrow-tailed Emerald
Melodic, two-note ascending whistle; pure tones stepping upward clearly, given repeatedly near territory boundary.
Geographic Range & Migration
Anna's Hummingbird
Western North America from southern British Columbia along the Pacific coast to Baja California. Range has expanded northward.
Narrow-tailed Emerald
Found in Andean highlands from Venezuela to Peru at 800-2,500 m elevation. Resident in montane forest edges.
保护状况
Anna's Hummingbird
Narrow-tailed Emerald
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
Narrow-tailed Emerald
White-chinned Sapphire (alt): males with glittering blue gorget; metallic green above; white chin; 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.
Narrow-tailed Emerald
窄尾翠蜂鸟(Chlorostilbon stenurus)是一种体长8-9厘米的小型蜂鸟，分布于委内瑞拉至秘鲁海拔800-2500米的安第斯高地。雄鸟通体翠绿色，尾羽修长而窄。以花蜜为食。