Nyanza Swift vs Great Dusky Swift
Apus niansae 对比 Cypseloides senex
Side-by-Side Comparison
| 属性 | Nyanza Swift | Great Dusky Swift |
|---|---|---|
| 学名 | Apus niansae | Cypseloides senex |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 31.0 cm (12.2 in) | 33.8 cm (13.3 in) |
| 体重 | 32.4 g (1.14 oz) | 83.0 g (2.93 oz) |
| 食性 | Obligate aerial forager; feeds entirely on the wing on small flying insects, midges, and airborne … | 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
Nyanza Swift
High, thin sibilant trill with insect-like quality; barely perceptible rapid modulation of a single high-pitched note.
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
Nyanza Swift
Found in East Africa from Ethiopia and Sudan south to Uganda and Kenya. Resident or intra-African migrant in open savanna near Lake Victoria.
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
Nyanza Swift
Great Dusky Swift
How to Tell Them Apart
Nyanza Swift
Dark sooty-brown overall; pale whitish chin and throat patch; underparts slightly paler brown; moderately forked tail; East African species similar to Common Swift but slightly paler below with a subtly …
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
Nyanza Swift
尼安萨雨燕栖息于东非和埃塞俄比亚高原，在岩石崖壁上繁殖。
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。