Pygmy Swiftlet vs Alpine Swift
Collocalia troglodytes 比較対象 Tachymarptis melba
Side-by-Side Comparison
| 属性 | Pygmy Swiftlet | Alpine Swift |
|---|---|---|
| 学名 | Collocalia troglodytes | Tachymarptis melba |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 18.6 cm (7.3 in) | 43.9 cm (17.3 in) |
| 体重 | 5.55 g (0.20 oz) | 97.5 g (3.44 oz) |
| 食性 | Obligate aerial insectivore; catches minute flies, beetles, and aerial spiders while foraging near cave roosts. | Aerial insectivore taking small flying insects and spiders; may forage at great heights following thermal … |
| 一腹卵数 | -- | 1-4 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Pygmy Swiftlet
Extremely high, thin twittering; among highest-pitched calls of any bird; 'tseee-tseee' barely audible to adults; uses echolocation clicks in Philippine limestone caves
Alpine Swift
Rapid series of short, clipped whistles; bright, clean notes delivered in quick succession with occasional doubled phrase.
Geographic Range & Migration
Pygmy Swiftlet
Endemic to the Philippines, found on Mindanao and adjacent islands. Resident in lowland forest and coastal caves. One of the smallest swiftlets.
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
Pygmy Swiftlet
Alpine Swift
How to Tell Them Apart
Pygmy Swiftlet
Tiny; dark blue-black upperparts with faint iridescence; white or pale buff rump band; underparts pale greyish-white; slightly forked tail; one of the smallest swiftlets in the Philippines; cave-nesting with pale …
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
Pygmy Swiftlet
フィリピンアナツバメはフィリピン固有の小型アナツバメで、石灰岩の洞窟に巣を作ることで知られる。
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。