Anna's Hummingbird vs Rufous-capped Thornbill
Calypte anna 对比 Chalcostigma ruficeps
Side-by-Side Comparison
| 属性 | Anna's Hummingbird | Rufous-capped Thornbill |
|---|---|---|
| 学名 | Calypte anna | Chalcostigma ruficeps |
| 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) | 11.6 cm (4.6 in) |
| 体重 | 4.3 g (0.15 oz) | 3.6666666666666665 g (0.13 oz) |
| 食性 | Nectar, small insects, and tree sap. Visits a wide variety of native and ornamental flowering … | Nectarivore of Peruvian and Bolivian puna; forages at Chuquiraga and low shrubs. Catches tiny arthropods. |
| 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.
Rufous-capped Thornbill
Melodic, descending phrase with warm timbre; clear notes stepping down smoothly in relaxed musical progression.
Geographic Range & Migration
Anna's Hummingbird
Western North America from southern British Columbia along the Pacific coast to Baja California. Range has expanded northward.
Rufous-capped Thornbill
Found on the eastern Andean slope from Ecuador south to Bolivia in lower montane forest. 1,200–2,600 m elevation.
保护状况
Anna's Hummingbird
Rufous-capped Thornbill
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
Rufous-capped Thornbill
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.
Rufous-capped Thornbill
棕顶金刚尾蜂鸟 (Chalcostigma ruficeps)，体长约12厘米。头顶棕红色，上体橄榄绿色，喉部具蓝紫色斑点，尾较长。分布于厄瓜多尔和秘鲁安第斯山脉的高海拔地带。以花蜜为主食。