Southern Swift vs Great Dusky Swift
Chaetura meridionalis 比較対象 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 |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 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 … |
| 一腹卵数 | 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.
保全状況
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
ブラジルからアルゼンチンの南アメリカ南東部に生息する小型アマツバメ（11〜12 cm）。暗い灰褐色の羽衣。棘状の尾。空中昆虫食性。南部で繁殖し北部へ移動する長距離渡り鳥。
Great Dusky Swift
グレートダスキースウィフトはブラジルとアルゼンチンに分布し、大きな滝の周辺で繁殖するアマツバメである。