Vaux's Swift vs White-chested Swift
Chaetura vauxi 对比 Cypseloides lemosi
Side-by-Side Comparison
| 属性 | Vaux's Swift | White-chested Swift |
|---|---|---|
| 学名 | Chaetura vauxi | Cypseloides lemosi |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 22.3 cm (8.8 in) | 30.0 cm (11.8 in) |
| 体重 | 18.033333333333335 g (0.64 oz) | 28.400000000000002 g (1.00 oz) |
| 食性 | Exclusively aerial insectivore catching small flying insects and spiders drifting in aerial plankton at altitude. | Obligate aerial forager catching small flies, aphids, winged termites, and airborne spiders on the wing. |
| 产卵数 | 1-7 | -- |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Vaux's Swift
Soft, high sibilant whisper followed by ticking notes; delicate trill barely audible beyond immediate roosting vicinity.
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
Vaux's Swift
Breeds in western North America from Alaska south to Central America. Migrates to winter in Venezuela and northwestern South America.
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
Vaux's Swift
White-chested Swift
How to Tell Them Apart
Vaux's Swift
Small; dark sooty-brown upperparts; pale grey rump slightly paler than back; underparts pale greyish-brown; short spiny tail; smaller and paler-bellied than Chimney Swift; Pacific coast North American species with 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
Vaux's Swift
沃氏雨燕 (Chaetura vauxi)，体长约11厘米，为北美最小的雨燕之一。体羽褐灰色，喉和腹部较淡，腰部略浅，尾短。繁殖于北美洲西部，冬季迁至中美洲和南美洲。以飞行昆虫为食，常在烟囱中营巢。
White-chested Swift
哥伦比亚雨燕限于哥伦比亚南部，是罕见的雨燕。