Pale-rumped Swift vs Great Dusky Swift
Chaetura egregia 比較対象 Cypseloides senex
Side-by-Side Comparison
| 属性 | Pale-rumped Swift | Great Dusky Swift |
|---|---|---|
| 学名 | Chaetura egregia | Cypseloides senex |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 23.4 cm (9.2 in) | 33.8 cm (13.3 in) |
| 体重 | 23.68 g (0.84 oz) | 83.0 g (2.93 oz) |
| 食性 | Obligate aerial insectivore; gathers small flying insects, winged ants, and airborne spiders during flight. | Feeds on aerial plankton of tiny insects and spiders; entire diet captured during non-stop aerial … |
| 一腹卵数 | -- | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Pale-rumped Swift
Breathy, rippling chatter with airy quality; light twittering notes loosely strung together in relaxed arrhythmic sequences.
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
Pale-rumped Swift
Found in the western Amazon basin from eastern Peru and Bolivia east to central Brazil. Resident in lowland tropical forest near rivers.
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
Pale-rumped Swift
Great Dusky Swift
How to Tell Them Apart
Pale-rumped Swift
Small; dark sooty-brown upperparts; distinctively very pale whitish rump strongly contrasting with dark back; underparts dark grey-brown; short spiny tail; Amazonian species with one of the most striking white rumps …
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
Pale-rumped Swift
コロンビアからペルー・ブラジル西部の湿潤低地林に生息する小型アマツバメ（11〜12 cm）。顕著な淡い腰帯を持つ暗い羽衣。棘状の尾。空中で昆虫を捕食。
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。