Great Dusky Swift vs Sabine's Spinetail
Cypseloides senex 对比 Rhaphidura sabini
Side-by-Side Comparison
| 属性 | Great Dusky Swift | Sabine's Spinetail |
|---|---|---|
| 学名 | Cypseloides senex | Rhaphidura sabini |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 33.8 cm (13.3 in) | 24.7 cm (9.7 in) |
| 体重 | 83.0 g (2.93 oz) | 17.75 g (0.63 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 | 2-3 |
| 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
Sabine's Spinetail
Faint, needle-thin whistle tapering at the end; soft twittering interspersed with clicking flight notes, barely audible.
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.
Sabine's Spinetail
Found in West and Central Africa from Sierra Leone east to the DRC and Uganda. Resident in lowland rainforest and forest edge.
保护状况
Great Dusky Swift
Sabine's Spinetail
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 …
Sabine's Spinetail
Small; dark blackish-brown upperparts; white rump patch; underparts pale grey-white; short spiny tail; West African rainforest species; closely resembles Silver-rumped Spinetail but purer white rump with less silvery sheen.
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。
Sabine's Spinetail
A small spinetail swift (11-12 cm) of lowland forests across West and Central Africa. Dark plumage with a white rump patch. Spine-tipped tail. Aerial insectivore, often seen foraging over forest canopy in mixed-species swift flocks. Nests in hollow trees.