Polynesian Swiftlet vs Alpine Swift
Aerodramus leucophaeus 对比 Tachymarptis melba
Side-by-Side Comparison
| 属性 | Polynesian Swiftlet | Alpine Swift |
|---|---|---|
| 学名 | Aerodramus leucophaeus | Tachymarptis melba |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 23.7 cm (9.3 in) | 43.9 cm (17.3 in) |
| 体重 | 13.4 g (0.47 oz) | 97.5 g (3.44 oz) |
| 食性 | Aerial insectivore catching tiny flying insects, midges, and airborne spiders in fast low-altitude flight near … | Aerial insectivore taking small flying insects and spiders; may forage at great heights following thermal … |
| 产卵数 | 2 | 1-4 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Polynesian Swiftlet
High twittering; thin 'chip-chip' over French Polynesian islands; echolocation clicks in cave roosts; light-colored underparts distinguish it visually; calls unremarkable
Alpine Swift
Rapid series of short, clipped whistles; bright, clean notes delivered in quick succession with occasional doubled phrase.
Geographic Range & Migration
Polynesian Swiftlet
Found across French Polynesia including the Society Islands, Marquesas, and Tuamotu. Resident in forest and open areas; 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
Polynesian Swiftlet
Alpine Swift
How to Tell Them Apart
Polynesian Swiftlet
Small; dark brown-grey upperparts with minimal gloss; pale grey rump band; underparts whitish-grey; forked tail; East Polynesian endemic from Society Islands; slightly more uniformly dark than some Pacific congeners.
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
Polynesian Swiftlet
一种小型金丝燕（体长10-11厘米），分布于法属波利尼西亚各地，包括社会群岛、马克萨斯群岛和澳斯特拉尔群岛。属雨燕科（Apodidae），是南太平洋分布较广的金丝燕。
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。