Great Dusky Swift vs Brown-backed Needletail
Cypseloides senex 对比 Hirundapus giganteus
Side-by-Side Comparison
| 属性 | Great Dusky Swift | Brown-backed Needletail |
|---|---|---|
| 学名 | Cypseloides senex | Hirundapus giganteus |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 33.8 cm (13.3 in) | 40.6 cm (16.0 in) |
| 体重 | 83.0 g (2.93 oz) | 145.0 g (5.11 oz) |
| 食性 | Feeds on aerial plankton of tiny insects and spiders; entire diet captured during non-stop aerial … | Aerial insectivore feeding on tiny flies, beetles, and ballooning spiders in rapid powerful aerial pursuit. |
| 产卵数 | 1-2 | 3-5 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
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
Brown-backed Needletail
Rough, buzzy chatter with intermittent higher squeaks; coarse twittering delivered continuously throughout aerial foraging.
Geographic Range & Migration
Great Dusky Swift
Found in eastern South America from Venezuela and the Guianas south to Bolivia and Paraguay. Resident near rocky cliffs and waterfalls.
Brown-backed Needletail
Found from India and Sri Lanka through Southeast Asia to Borneo and the Philippines. Resident in lowland and hill forest, soaring over ridges.
保护状况
Great Dusky Swift
Brown-backed Needletail
How to Tell Them Apart
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 …
Brown-backed Needletail
Very large; dark brown upperparts with bronze gloss; no pale back saddle unlike congeners; white throat patch; white undertail coverts; short spiny tail; largest Hirundapus; brown rather than black overall …
About These Birds
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。
Brown-backed Needletail
棕喉针尾雨燕是该属体型最大的物种，分布于南亚和东南亚的热带森林。喉部棕色，背部深褐，具白色腰斑。飞行速度极快，在空中度过大部分时间，以飞行昆虫为食。栖息于森林和山地地带。