Seychelles Swiftlet vs Alpine Swift
Aerodramus elaphrus 对比 Tachymarptis melba
Side-by-Side Comparison
| 属性 | Seychelles Swiftlet | Alpine Swift |
|---|---|---|
| 学名 | Aerodramus elaphrus | Tachymarptis melba |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保护状况 | Vulnerable | Least Concern |
| 体长 | — | — |
| 翼展 | 22.6 cm (8.9 in) | 43.9 cm (17.3 in) |
| 体重 | 11.266666666666666 g (0.40 oz) | 97.5 g (3.44 oz) |
| 食性 | Feeds aerially on tiny flying insects and drifting spiders; often forages in mixed-species flocks over … | Aerial insectivore taking small flying insects and spiders; may forage at great heights following thermal … |
| 产卵数 | 1 | 1-4 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Seychelles Swiftlet
Rapid twittering; thin 'tsit-tsit' over Seychelles islands; audible echolocation clicks in caves; endangered endemic; calls weakly in small flocks over forest and coast
Alpine Swift
Rapid series of short, clipped whistles; bright, clean notes delivered in quick succession with occasional doubled phrase.
Geographic Range & Migration
Seychelles Swiftlet
Endemic to the Seychelles Islands in the western Indian Ocean. Resident on the main granitic islands including Mahé. Nests in sea caves.
Alpine Swift
Breeds from southern Europe and North Africa east through Central Asia and the Himalayas to India. Migratory; winters in sub-Saharan Africa.
保护状况
Seychelles Swiftlet
Alpine Swift
How to Tell Them Apart
Seychelles Swiftlet
Small; dark brownish-grey upperparts with slight gloss; pale grey-buff rump band; underparts whitish-grey; forked tail; Seychelles endemic and vulnerable due to restricted range; slightly larger and less glossy than sympatric …
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
Seychelles Swiftlet
一种小型金丝燕（体长10-11厘米），特产于印度洋塞舌尔群岛。体羽深灰褐色。属雨燕科（Apodidae），在岛上的洞穴和悬崖上繁殖，种群数量有限。
Alpine Swift
高山雨燕在欧洲山地和岩壁上繁殖，以白色腹部和较大体型为特征的长距离迁徙鸟类。