Bradfield's Swift vs White-collared Swift
Apus bradfieldi 对比 Streptoprocne zonaris
Side-by-Side Comparison
| 属性 | Bradfield's Swift | White-collared Swift |
|---|---|---|
| 学名 | Apus bradfieldi | Streptoprocne zonaris |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 35.2 cm (13.9 in) | 42.5 cm (16.7 in) |
| 体重 | 44.25 g (1.56 oz) | 106.45 g (3.75 oz) |
| 食性 | Entirely aerial insectivore consuming swarms of tiny flies, winged ants, and ballooning spiders on the … | Obligate aerial insectivore; gathers small flying insects, winged ants, and airborne spiders during flight. |
| 产卵数 | 2 | 2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Bradfield's Swift
Pure, whistled two-note phrase; first note high and sustained, second lower and brief, repeated every few seconds clearly.
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
Bradfield's Swift
Found in Namibia and adjacent parts of South Africa, Botswana, and Angola. Resident in rocky desert, escarpment cliffs, and semi-arid terrain.
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
Bradfield's Swift
White-collared Swift
How to Tell Them Apart
Bradfield's Swift
Dark sooty-brown overall; pale greyish throat patch; underparts slightly paler; large for an African Apus swift; Southern Africa dry-country specialist; slightly larger and greyer-toned than Pallid Swift with less pale …
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
Bradfield's Swift
布拉德菲尔德雨燕栖息于纳米比亚和安哥拉周边的南部非洲，是淡色的雨燕。
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。