Uniform Swiftlet vs Great Dusky Swift
Aerodramus vanikorensis 对比 Cypseloides senex
Side-by-Side Comparison
| 属性 | Uniform Swiftlet | Great Dusky Swift |
|---|---|---|
| 学名 | Aerodramus vanikorensis | Cypseloides senex |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 23.2 cm (9.1 in) | 33.8 cm (13.3 in) |
| 体重 | 10.4 g (0.37 oz) | 83.0 g (2.93 oz) |
| 食性 | Tiny aerial insectivore taking small flying insects and spiders; congregates where insects emerge over water. | Feeds on aerial plankton of tiny insects and spiders; entire diet captured during non-stop aerial … |
| 产卵数 | 1-2 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Uniform Swiftlet
Thin, high-pitched twittering; 'tsit-tsit' notes over Pacific islands; echolocation clicks inside caves; uniform dark plumage matched by simple unremarkable call 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
Uniform Swiftlet
Found across Melanesia from the Moluccas and New Guinea east through the Solomons, Vanuatu, and Fiji. Resident in diverse habitats.
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
Uniform Swiftlet
Great Dusky Swift
How to Tell Them Apart
Uniform Swiftlet
Small; dark grey-brown plumage throughout with rump barely or not at all paler than back; underparts slightly paler grey-brown; forked tail; unusually for Aerodramus, has minimal rump contrast; widespread Melanesian …
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
Uniform Swiftlet
一种小型金丝燕（体长11-12厘米），广泛分布于从马来半岛经印度尼西亚至美拉尼西亚的地区。体羽深色。属雨燕科（Apodidae），是西太平洋岛屿上常见的金丝燕。
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。