Pallid Swift vs Ashy-tailed Swift
Apus pallidus 比較対象 Chaetura andrei
Side-by-Side Comparison
| 属性 | Pallid Swift | Ashy-tailed Swift |
|---|---|---|
| 学名 | Apus pallidus | Chaetura andrei |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保全状況 | Least Concern | Vulnerable |
| 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) | 17.1 g (0.60 oz) |
| 食性 | Aerial insectivore foraging continuously in flight, taking tiny flies, beetles, and ballooning spiders. | Aerial insectivore foraging continuously in flight, taking tiny flies, beetles, and ballooning spiders. |
| 一腹卵数 | 1-4 | -- |
| 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.
Ashy-tailed Swift
Dry rattling chatter with sharp staccato onset; brief bursts of clicking notes followed by descending hissing sound.
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.
Ashy-tailed Swift
Found in eastern Brazil, Bolivia, Paraguay, and northern Argentina. Partially migratory; moves north in austral winter. Lowland forest.
保全状況
Pallid Swift
Ashy-tailed 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 …
Ashy-tailed Swift
Small; dark sooty-brown overall; distinctly pale ashy-grey rump and tail contrasting with dark body; underparts dark grey-brown; ashy rump and tail the defining feature separating it from other South American …
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。
Ashy-tailed Swift
ベネズエラ・ギアナ・トリニダードの低地林に生息する小型アマツバメ（11〜12 cm）で、ブラジル南東部にも別集団が存在。灰褐色の腰と下尾筒を持つ暗い羽衣。棘状の尾先。空中で昆虫を捕食。