Short-tailed Swift vs Great Dusky Swift
Chaetura brachyura 对比 Cypseloides senex
Side-by-Side Comparison
| 属性 | Short-tailed Swift | Great Dusky Swift |
|---|---|---|
| 学名 | Chaetura brachyura | Cypseloides senex |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 23.7 cm (9.3 in) | 33.8 cm (13.3 in) |
| 体重 | 18.625 g (0.66 oz) | 83.0 g (2.93 oz) |
| 食性 | Feeds exclusively on aerial plankton — tiny flies, aphids, and spiders — captured in continuous … | Feeds on aerial plankton of tiny insects and spiders; entire diet captured during non-stop aerial … |
| 产卵数 | 2-7 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Short-tailed Swift
Harsh, screaming chatter with emphatic delivery; loud coarse notes erupting suddenly during competitive aerial encounters.
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
Short-tailed Swift
Found across South America east of the Andes, from Trinidad and the Guianas south to Bolivia and the Río de la Plata. Lowland 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
Short-tailed Swift
Great Dusky Swift
How to Tell Them Apart
Short-tailed Swift
Small; dark sooty-brown upperparts; very pale whitish rump and tail contrasting sharply with dark body; underparts pale greyish; extremely short tail giving distinctive blunt-ended flight silhouette; widespread Trinidad to Argentina.
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
Short-tailed Swift
短尾雨燕 (Chaetura brachyura)，体长约10厘米，尾极短，身体粗壮。体羽黑褐色，腰部灰色，喉部淡色。广泛分布于中美洲和南美洲北部。以飞行昆虫为食，在空中高速飞翔，常成群活动。
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。