Pacific Swift vs White-collared Swift
Apus pacificus 对比 Streptoprocne zonaris
Side-by-Side Comparison
| 属性 | Pacific Swift | White-collared Swift |
|---|---|---|
| 学名 | Apus pacificus | Streptoprocne zonaris |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 34.6 cm (13.6 in) | 42.5 cm (16.7 in) |
| 体重 | 41.516666666666666 g (1.46 oz) | 106.45 g (3.75 oz) |
| 食性 | Feeds aerially on tiny insects and spiders, often following weather fronts where aerial plankton concentrates. | Obligate aerial insectivore; gathers small flying insects, winged ants, and airborne spiders during flight. |
| 产卵数 | 1-3 | 2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Pacific Swift
Thin, reedy trill with nasal overtone; soft chattering notes delivered continuously during rapid low-level flight over fields.
White-collared Swift
Loud, screaming 'shreee-shreee'; powerful screeching trill; calls from large flocks over mountains; very audible; one of the loudest Neotropical swifts; alarm a harsh rattle
Geographic Range & Migration
Pacific Swift
Breeds from Siberia and Japan south to China and the Himalayas. Long-distance migrant wintering in Southeast Asia and Australia.
White-collared Swift
Found from Mexico south through Central America to South America east of the Andes, reaching Bolivia and southern Brazil. Often in large flocks.
保护状况
Pacific Swift
White-collared Swift
How to Tell Them Apart
Pacific Swift
Dark blackish-brown upperparts; distinctive white rump patch contrasting with dark back; white throat patch; underparts dark with pale brown barring; deeply forked tail; white rump distinguishes it from Common Swift …
White-collared Swift
Large; glossy blue-black plumage with bold broad white collar encircling entire neck; collar clean and complete; underparts black; large slightly forked tail; among the most recognisable Neotropical swifts due to …
About These Birds
Pacific Swift
白腰雨燕在西伯利亚至东南亚繁殖，迁徙至澳大利亚越冬，是大型雨燕。
White-collared Swift
白领雨燕广泛分布于拉丁美洲山地，以白色颈环为特征的大型雨燕。