Ridgetop Swiftlet vs Alpine Swift
Collocalia isonota 比較対象 Tachymarptis melba
Side-by-Side Comparison
| 属性 | Ridgetop Swiftlet | Alpine Swift |
|---|---|---|
| 学名 | Collocalia isonota | Tachymarptis melba |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保全状況 | Not Evaluated | Least Concern |
| 体長 | — | — |
| 翼開長 | — | 43.9 cm (17.3 in) |
| 体重 | 6.483333333333333 g (0.23 oz) | 97.5 g (3.44 oz) |
| 食性 | Obligate aerial feeder on microscopic flying insects and spiders; highly social forager over tropical forest. | 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
Ridgetop Swiftlet
Thin, high twittering; soft 'chip-chip' over Solomon Islands ridges; echolocation clicks in caves; one of smallest swiftlets; calls barely audible; rapid chittering in flight
Alpine Swift
Rapid series of short, clipped whistles; bright, clean notes delivered in quick succession with occasional doubled phrase.
Geographic Range & Migration
Ridgetop Swiftlet
Endemic to the Solomon Islands. Found on Bougainville, Guadalcanal, and other major islands in lowland rainforest.
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
Ridgetop Swiftlet
Alpine Swift
How to Tell Them Apart
Ridgetop Swiftlet
Tiny swiftlet; glossy dark blue-green upperparts; pale buff rump band; dark sooty-brown underparts; slightly forked tail; recently described Philippine endemic; differs from congeners primarily in voice and ridge-top ridge habitat.
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
Ridgetop Swiftlet
A small swiftlet (9-10 cm) found in montane regions of the Philippines and the Lesser Sundas. Dark glossy plumage. Aerial insectivore. Recently split from Glossy Swiftlet. A high-altitude specialist, often found above 1,000 m on mountain ridges.
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。