Pallid Swift vs Vaux's Swift
Apus pallidus 比較対象 Chaetura vauxi
Side-by-Side Comparison
| 属性 | Pallid Swift | Vaux's Swift |
|---|---|---|
| 学名 | Apus pallidus | Chaetura vauxi |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 33.4 cm (13.1 in) | 22.3 cm (8.8 in) |
| 体重 | 42.25 g (1.49 oz) | 18.033333333333335 g (0.64 oz) |
| 食性 | Aerial insectivore foraging continuously in flight, taking tiny flies, beetles, and ballooning spiders. | Exclusively aerial insectivore catching small flying insects and spiders drifting in aerial plankton at altitude. |
| 一腹卵数 | 1-4 | 1-7 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Pallid Swift
Melodic, rolling trill with rich timbre; sustained musical phrase with slight variations on repeated delivery at dusk.
Vaux's Swift
Soft, high sibilant whisper followed by ticking notes; delicate trill barely audible beyond immediate roosting vicinity.
Geographic Range & Migration
Pallid Swift
Breeds in the Mediterranean and North Africa east to Pakistan. Migratory; winters in sub-Saharan Africa from Senegal to Ethiopia.
Vaux's Swift
Breeds in western North America from Alaska south to Central America. Migrates to winter in Venezuela and northwestern South America.
保全状況
Pallid Swift
Vaux's Swift
How to Tell Them Apart
Pallid Swift
Medium-large; pale brownish-grey overall, distinctly paler than Common Swift; larger pale throat patch; wing coverts show pale scaly edges; Mediterranean and Middle Eastern species; pale sandy-brown tone separates it from …
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 …
About These Birds
Pallid Swift
カフリアマツバメは地中海沿岸やアフリカ北部に繁殖し、ヨーロッパアマツバメより淡い色合いが特徴的である。
Vaux's Swift
アラスカから中米にかけての北米西部に生息する小型アマツバメ（11〜12 cm）。煙突アマツバメに似るが小さい暗い灰褐色の羽衣。棘状の尾。空中昆虫食性。木の洞に営巣。