Southern Swift vs Great Dusky Swift
Chaetura meridionalis 对比 Cypseloides senex
Side-by-Side Comparison
| 属性 | Southern Swift | Great Dusky Swift |
|---|---|---|
| 学名 | Chaetura meridionalis | Cypseloides senex |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 26.3 cm (10.4 in) | 33.8 cm (13.3 in) |
| 体重 | 19.8 g (0.70 oz) | 83.0 g (2.93 oz) |
| 食性 | Completely aerial diet of small flying insects and spiders; never forages on the ground or … | Feeds on aerial plankton of tiny insects and spiders; entire diet captured during non-stop aerial … |
| 产卵数 | 3-5 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Southern Swift
Faint, thin squealing trill; rapid metallic chips cascading high-pitched over coastal forest, almost ventriloquial in quality.
Great Dusky Swift
Loud, churring trill; harsher and louder than other Cypseloides; calls over Iguacu Falls and major Neotropical waterfalls; buzzy 'bzzzt-bzzzt' in aerial groups
Geographic Range & Migration
Southern Swift
Found in southern South America from Brazil to Argentina. Migratory, moving north to Amazonia during the austral winter. Open areas and forest.
Great Dusky Swift
Found in eastern South America from Venezuela and the Guianas south to Bolivia and Paraguay. Resident near rocky cliffs and waterfalls.
保护状况
Southern Swift
Great Dusky Swift
How to Tell Them Apart
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 …
Great Dusky Swift
Very large; entirely dark sooty-brown with pale grey forehead and chin scaling; slightly paler underparts; broad wings; largest Cypseloides swift; South American waterfall specialist with dusky uniform plumage and imposing …
About These Birds
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。
Great Dusky Swift
大暗色雨燕分布于巴西和阿根廷，在大型瀑布附近繁殖的雨燕。