White-rumped Swift vs Great Dusky Swift
Apus caffer 对比 Cypseloides senex
Side-by-Side Comparison
| 属性 | White-rumped Swift | Great Dusky Swift |
|---|---|---|
| 学名 | Apus caffer | Cypseloides senex |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 29.0 cm (11.4 in) | 33.8 cm (13.3 in) |
| 体重 | 23.0 g (0.81 oz) | 83.0 g (2.93 oz) |
| 食性 | Aerial insectivore taking small flying insects and spiders; may forage at great heights following thermal … | Feeds on aerial plankton of tiny insects and spiders; entire diet captured during non-stop aerial … |
| 产卵数 | 1-3 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
White-rumped Swift
Deep, guttural churring with resonant buzzing quality; prolonged low-frequency trill vibrating persistently through dense foliage.
Great Dusky Swift
Loud, churring trill; harsher and louder than other Cypseloides; calls over Iguacu Falls and major Neotropical waterfalls; buzzy 'bzzzt-bzzzt' in aerial groups
Geographic Range & Migration
White-rumped Swift
Breeds in southern Europe and North Africa east to Central Asia. Migratory; winters in sub-Saharan Africa from Senegal south to South Africa.
Great Dusky Swift
Found in eastern South America from Venezuela and the Guianas south to Bolivia and Paraguay. Resident near rocky cliffs and waterfalls.
保护状况
White-rumped Swift
Great Dusky Swift
How to Tell Them Apart
White-rumped Swift
Dark sooty-brown; narrow elongated white rump patch; white throat; underparts dark; forked tail; African species; narrower and more elongated white rump than Little Swift; deeply forked tail unlike the square …
Great Dusky Swift
Very large; entirely dark sooty-brown with pale grey forehead and chin scaling; slightly paler underparts; broad wings; largest Cypseloides swift; South American waterfall specialist with dusky uniform plumage and imposing …
About These Birds
White-rumped Swift
白腰雨燕广泛分布于撒哈拉以南非洲，以白色腰部为特征的中型雨燕。
Great Dusky Swift
大暗色雨燕分布于巴西和阿根廷，在大型瀑布附近繁殖的雨燕。