Vaux's Swift vs Alpine Swift
Chaetura vauxi 对比 Tachymarptis melba
Side-by-Side Comparison
| 属性 | Vaux's Swift | Alpine Swift |
|---|---|---|
| 学名 | Chaetura vauxi | Tachymarptis melba |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 22.3 cm (8.8 in) | 43.9 cm (17.3 in) |
| 体重 | 18.033333333333335 g (0.64 oz) | 97.5 g (3.44 oz) |
| 食性 | Exclusively aerial insectivore catching small flying insects and spiders drifting in aerial plankton at altitude. | Aerial insectivore taking small flying insects and spiders; may forage at great heights following thermal … |
| 产卵数 | 1-7 | 1-4 |
| 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.
Alpine Swift
Rapid series of short, clipped whistles; bright, clean notes delivered in quick succession with occasional doubled phrase.
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.
Alpine Swift
Breeds from southern Europe and North Africa east through Central Asia and the Himalayas to India. Migratory; winters in sub-Saharan Africa.
保护状况
Vaux's Swift
Alpine 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 …
Alpine Swift
Large; dark brown upperparts; white throat patch separated from white belly by dark brown breast band; brown flanks; bold tricoloured underpart pattern; one of Europe's largest swifts with distinctive white …
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。
Alpine Swift
高山雨燕在欧洲山地和岩壁上繁殖，以白色腹部和较大体型为特征的长距离迁徙鸟类。