Pallid Swift vs Sooty Swift
Apus pallidus 对比 Cypseloides fumigatus
Side-by-Side Comparison
| 属性 | Pallid Swift | Sooty Swift |
|---|---|---|
| 学名 | Apus pallidus | Cypseloides fumigatus |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 33.4 cm (13.1 in) | 29.0 cm (11.4 in) |
| 体重 | 42.25 g (1.49 oz) | 41.666666666666664 g (1.47 oz) |
| 食性 | Aerial insectivore foraging continuously in flight, taking tiny flies, beetles, and ballooning spiders. | Catches aerial plankton — tiny midges, gnats, and ballooning spiders — continuously during soaring flight. |
| 产卵数 | 1-4 | 1 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Pallid Swift
Melodic, rolling trill with rich timbre; sustained musical phrase with slight variations on repeated delivery at dusk.
Sooty Swift
Soft twittering 'tsit-tsit'; thin, buzzy notes in flight; calls over Neotropical waterfalls and gorges; quiet, raspy trill; rarely as vocal as larger swift species
Geographic Range & Migration
Pallid Swift
Breeds in the Mediterranean and North Africa east to Pakistan. Migratory; winters in sub-Saharan Africa from Senegal to Ethiopia.
Sooty Swift
Found in the Guiana Shield and Amazon Basin in Brazil, Venezuela, and the Guianas. Nomadic; associated with rocky outcrops and waterfalls.
保护状况
Pallid Swift
Sooty Swift
How to Tell Them Apart
Pallid Swift
Medium-large; pale brownish-grey overall, distinctly paler than Common Swift; larger pale throat patch; wing coverts show pale scaly edges; Mediterranean and Middle Eastern species; pale sandy-brown tone separates it from …
Sooty Swift
Uniformly dark sooty-brown plumage throughout; no contrasting pale markings anywhere; slightly paler brownish-grey on throat; large and uniform; South American species whose entirely dark coloration recalls blackish swiftlets but much …
About These Birds
Pallid Swift
淡色雨燕在地中海沿岸和北非繁殖，颜色比普通雨燕更淡。
Sooty Swift
烟色雨燕栖息于南美洲热带地区，具有煤烟色暗色羽毛。