Caroline Swiftlet vs Great Dusky Swift
Aerodramus inquietus 对比 Cypseloides senex
Side-by-Side Comparison
| 属性 | Caroline Swiftlet | Great Dusky Swift |
|---|---|---|
| 学名 | Aerodramus inquietus | Cypseloides senex |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 22.8 cm (9.0 in) | 33.8 cm (13.3 in) |
| 体重 | 11.0 g (0.39 oz) | 83.0 g (2.93 oz) |
| 食性 | Feeds on aerial plankton including tiny flies and spiders; forages in large noisy flocks above … | 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
Caroline Swiftlet
Thin twittering calls; 'tsit-tsit' over Caroline Islands; echolocation clicks in cave roosts; moderate-pitched for swiftlet; produces soft chattering at colonial nesting sites
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
Caroline Swiftlet
Found across the Caroline Islands of Micronesia including Pohnpei and Chuuk. Resident in lowland forest and cave systems.
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
Caroline Swiftlet
Great Dusky Swift
How to Tell Them Apart
Caroline Swiftlet
Small; dark grey-brown upperparts; pale buff rump band; underparts pale greyish-white; forked tail; Micronesian endemic from Caroline Islands; very similar to Palau Swiftlet but distributed on a distinct island group.
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
Caroline Swiftlet
一种小型金丝燕（体长10-11厘米），特产于密克罗尼西亚卡罗林群岛（波纳佩岛、科斯雷岛）。体羽深色。属雨燕科（Apodidae），是太平洋岛屿的特有种。
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。