Nyanza Swift vs White-chested Swift
Apus niansae 对比 Cypseloides lemosi
Side-by-Side Comparison
| 属性 | Nyanza Swift | White-chested Swift |
|---|---|---|
| 学名 | Apus niansae | Cypseloides lemosi |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 31.0 cm (12.2 in) | 30.0 cm (11.8 in) |
| 体重 | 32.4 g (1.14 oz) | 28.400000000000002 g (1.00 oz) |
| 食性 | Obligate aerial forager; feeds entirely on the wing on small flying insects, midges, and airborne … | Obligate aerial forager catching small flies, aphids, winged termites, and airborne spiders on the wing. |
| 产卵数 | 1-3 | -- |
| 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.
White-chested Swift
High, thin twittering; soft 'tsit' calls in flight; calls over Colombian waterfalls; very poorly known; thin, reedy contact notes; one of most rarely documented swifts
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.
White-chested Swift
Known from Colombia and adjacent Ecuador. One of the world's rarest swifts; recorded at waterfalls in humid forest foothills at 500–1,200 m.
保护状况
Nyanza Swift
White-chested 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 …
White-chested Swift
Black upperparts and wings; distinctive large white chest patch contrasting sharply with black throat and belly; white confined to central breast; Colombian endemic with unique bold bicoloured plumage unlike any …
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。
White-chested Swift
哥伦比亚雨燕限于哥伦比亚南部，是罕见的雨燕。