Pallid Swift vs Southern Swift
Apus pallidus 对比 Chaetura meridionalis
Side-by-Side Comparison
| 属性 | Pallid Swift | Southern Swift |
|---|---|---|
| 学名 | Apus pallidus | Chaetura meridionalis |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 33.4 cm (13.1 in) | 26.3 cm (10.4 in) |
| 体重 | 42.25 g (1.49 oz) | 19.8 g (0.70 oz) |
| 食性 | Aerial insectivore foraging continuously in flight, taking tiny flies, beetles, and ballooning spiders. | Completely aerial diet of small flying insects and spiders; never forages on the ground or … |
| 产卵数 | 1-4 | 3-5 |
| 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.
Southern Swift
Faint, thin squealing trill; rapid metallic chips cascading high-pitched over coastal forest, almost ventriloquial in quality.
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.
Southern Swift
Found in southern South America from Brazil to Argentina. Migratory, moving north to Amazonia during the austral winter. Open areas and forest.
保护状况
Pallid Swift
Southern 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 …
Southern Swift
Small; dark sooty-brown overall; pale grey rump band moderately contrasting with dark back; underparts dark grey-brown; short spiny tail; southern South American migratory species; closely resembles Ashy-tailed Swift but rump …
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。
Southern Swift
南方雨燕 (Chaetura meridionalis)，体长约12厘米。体羽深褐色，腰部灰褐色，喉淡色，尾短而刚硬。分布于南美洲中南部，包括巴西中部和阿根廷北部。在空中觅食昆虫，常成大群迁徙。