White-rumped Swiftlet vs Alpine Swift
Aerodramus spodiopygius 比較対象 Tachymarptis melba
Side-by-Side Comparison
| 属性 | White-rumped Swiftlet | Alpine Swift |
|---|---|---|
| 学名 | Aerodramus spodiopygius | Tachymarptis melba |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 23.4 cm (9.2 in) | 43.9 cm (17.3 in) |
| 体重 | 7.4 g (0.26 oz) | 97.5 g (3.44 oz) |
| 食性 | Feeds on aerial plankton including tiny flies and spiders; forages in large noisy flocks above … | Aerial insectivore taking small flying insects and spiders; may forage at great heights following thermal … |
| 一腹卵数 | 1-2 | 1-4 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
White-rumped Swiftlet
Rapid thin twittering; high 'tsit-tsit' notes over Pacific islands; echolocation clicks in caves; colonial; produces soft chattering in roost cavities; unremarkable call
Alpine Swift
Rapid series of short, clipped whistles; bright, clean notes delivered in quick succession with occasional doubled phrase.
Geographic Range & Migration
White-rumped Swiftlet
Found across the southwestern Pacific including Fiji, Samoa, Tonga, and Vanuatu east to the Cook Islands. Resident from coast to mountains.
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
White-rumped Swiftlet
Alpine Swift
How to Tell Them Apart
White-rumped Swiftlet
Small; dark brownish-black upperparts with faint gloss; white rump patch contrasting sharply with dark back and tail; underparts pale greyish-white; forked tail; widespread Pacific species with diagnostically bright white rump.
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
White-rumped Swiftlet
シロアナツバメは太平洋諸島に広く分布し、腰部の白色が特徴的なアナツバメである。
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。