Bradfield's Swift vs Alpine Swift
Apus bradfieldi 对比 Tachymarptis melba
Side-by-Side Comparison
| 属性 | Bradfield's Swift | Alpine Swift |
|---|---|---|
| 学名 | Apus bradfieldi | Tachymarptis melba |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 35.2 cm (13.9 in) | 43.9 cm (17.3 in) |
| 体重 | 44.25 g (1.56 oz) | 97.5 g (3.44 oz) |
| 食性 | Entirely aerial insectivore consuming swarms of tiny flies, winged ants, and ballooning spiders on the … | 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
Bradfield's Swift
Pure, whistled two-note phrase; first note high and sustained, second lower and brief, repeated every few seconds clearly.
Alpine Swift
Rapid series of short, clipped whistles; bright, clean notes delivered in quick succession with occasional doubled phrase.
Geographic Range & Migration
Bradfield's Swift
Found in Namibia and adjacent parts of South Africa, Botswana, and Angola. Resident in rocky desert, escarpment cliffs, and semi-arid terrain.
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
Bradfield's Swift
Alpine Swift
How to Tell Them Apart
Bradfield's Swift
Dark sooty-brown overall; pale greyish throat patch; underparts slightly paler; large for an African Apus swift; Southern Africa dry-country specialist; slightly larger and greyer-toned than Pallid Swift with less 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
Bradfield's Swift
布拉德菲尔德雨燕栖息于纳米比亚和安哥拉周边的南部非洲，是淡色的雨燕。
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。