Ashy-tailed Swift vs Alpine Swift
Chaetura andrei 比較対象 Tachymarptis melba
Side-by-Side Comparison
| 属性 | Ashy-tailed Swift | Alpine Swift |
|---|---|---|
| 学名 | Chaetura andrei | Tachymarptis melba |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保全状況 | Vulnerable | Least Concern |
| 体長 | — | — |
| 翼開長 | 22.3 cm (8.8 in) | 43.9 cm (17.3 in) |
| 体重 | 17.1 g (0.60 oz) | 97.5 g (3.44 oz) |
| 食性 | Aerial insectivore foraging continuously in flight, taking tiny flies, beetles, and ballooning spiders. | Aerial insectivore taking small flying insects and spiders; may forage at great heights following thermal … |
| 一腹卵数 | -- | 1-4 |
| Population Trend | — | — |
Song & Call Comparison
Ashy-tailed Swift
Dry rattling chatter with sharp staccato onset; brief bursts of clicking notes followed by descending hissing sound.
Alpine Swift
Rapid series of short, clipped whistles; bright, clean notes delivered in quick succession with occasional doubled phrase.
Geographic Range & Migration
Ashy-tailed Swift
Found in eastern Brazil, Bolivia, Paraguay, and northern Argentina. Partially migratory; moves north in austral winter. Lowland forest.
Alpine Swift
Breeds from southern Europe and North Africa east through Central Asia and the Himalayas to India. Migratory; winters in sub-Saharan Africa.
保全状況
Ashy-tailed Swift
Alpine Swift
How to Tell Them Apart
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 …
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
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。
Alpine Swift
アルプスアマツバメはヨーロッパの山岳地帯と岩壁に繁殖し、白い腹と大きな体が特徴的な長距離渡り鳥である。